Emergencies — recognize deterioration

Both potassium extremes destabilize cardiac myocyte membranes; in hyperkalemia the first manifestation can be a lethal arrhythmia.

Sodium and water derangements move water into (hyponatremia) or out of (hypernatremia) brain cells — any new mental-status change is a report-immediately finding.

Cerebral edema, intracellular brain dehydration, and neuromuscular hyperirritability all lower the seizure threshold.

Hypermagnesemia sedates the neuromuscular system in stages; lost reflexes are the warning that respiratory depression and cardiac arrest are next.

For hyperkalemia with ECG changes the sequence is fixed: IV calcium gluconate first to stabilize the cardiac membrane (it does not lower K⁺) → shift K⁺ into cells with regular insulin 10 units + D50 (check glucose) and/or high-dose albuterol → remove it with exchangers, diuretics, or dialysis (definitive in renal failure). Unmanaged severe hyperkalemia carries a mortality approaching two-thirds.

Untreated it progresses to multiorgan failure and death. Anticipate rapid isotonic crystalloid resuscitation (30 mL/kg boluses in adults) and balanced blood products for hemorrhage; the resuscitation endpoint is urine output back above 0.5 mL/kg/hr.

Stridor or spasm after thyroid or parathyroid surgery is this until proven otherwise (surgical injury is the leading cause of hypoparathyroidism). Anticipate IV calcium gluconate 1–2 g over 10–20 min and keep airway support at hand.

Rising CO₂ depresses the CNS — the CO₂ narcosis picture. A moribund, lethargic, or confused patient in acute respiratory acidosis needs ICU-level monitoring — rising CO₂ can progress to seizures and coma.

Severe hypercapnic cerebral vasodilation raises intracranial pressure — the end of the respiratory-acidosis road.

The hypokalemia and hypocalcemia that travel with alkalosis can produce life-threatening arrhythmias — the reason "just hyperventilation" still gets a monitor check.

Severe alkalosis decreases cerebral blood flow and impairs peripheral O₂ unloading — a deteriorating LOC in alkalosis is a report-now finding.

This patient needs ICU-level monitoring. Anticipate CPAP/BiPAP or intubation and mechanical ventilation for hypoventilation — and expect gradual CO₂ correction: rapid alkalization of the CSF can cause seizures. Respiratory stimulants are not effective.

Treatment is the underlying cause, not the number: fluid resuscitation and electrolyte correction. IV sodium bicarbonate is considered only in severe acidosis (pH < 7.1) — in DKA the 2024 ADA/EASD consensus reserves it for pH < 7.0 — because it carries its own risks: hypernatremia, hypocalcemia, intracellular acidification, increased lactate, reduced contractility.

Escalate any alkalosis with confusion, seizures, arrhythmias, or hypotension — uncorrected metabolic alkalosis can cause hypotension and cardiac dysfunction.

A late finding — it appears only after compensatory mechanisms fail. Waiting for a low BP to call shock means missing the whole compensated stage.

Cerebral hypoperfusion — the early anxiety has progressed. Altered mental status is an excellent predictor of poor outcomes and demands immediate escalation.

Late catecholamine-driven vasoconstriction — even distributive shock converts to this “cold” picture as compensation is exhausted.

The neurogenic outlier: lost sympathetic tone leaves unopposed vagal influence on the heart (bradycardia) and dilates skin vessels (warm and dry) — the opposite of the cool, tachycardic pattern every other shock produces.

Pericardial fluid under pressure blocks diastolic filling (tamponade). Pulsus paradoxus = an inspiratory systolic drop over 10 mmHg. This is obstructive shock needing immediate pericardiocentesis.

Tension pneumothorax: one-way-valve air trapping shifts the mediastinum and compresses the vena cava, cutting venous return. A clinical diagnosis — decompress, do not wait for imaging.

The nurse’s counter is early recognition: treat rising heart rate, narrowing pulse pressure, restlessness, falling urine output, and climbing lactate as the emergency — not the eventual low BP. Escalate on the trend, not the threshold.

Keep the patient warm, limit crystalloid in hemorrhage in favor of balanced blood products, and watch coagulation labs — a degree of coagulopathy begins in 25–56% of trauma patients before resuscitation even starts.

Its vicious cycle (low output → coronary ischemia → weaker pump) will not respond to volume — anticipate norepinephrine over dopamine, inotropes such as dobutamine, and urgent revascularization (PCI irrespective of time delay).

The brain is losing perfusion. In older adults, a change in mental status is often the first sign of sepsis — classically from a UTI, with no dysuria at all. New altered mentation is a report-immediately finding.

The underperfused kidney shuts down: urine output < 0.5 mL/kg/hr signals acute kidney injury, and anuria is a report-immediately finding.

Vasodilation plus capillary leak have outrun compensation. Report immediately — this is the trigger for the 30 mL/kg crystalloid bolus and, if it persists, vasopressors.

The warm-to-cold inversion: compensation has failed and vasoconstriction is sacrificing the periphery — the late, decompensating phase of septic shock.

The herald of DIC: widespread clotting has consumed platelets and clotting factors, so the patient thromboses and hemorrhages at once. Report immediately.

Watch for the heralds and report immediately: bleeding from multiple sites (gingiva, IV and surgical sites, vagina, rectum), widespread petechiae, purpura, cyanosis. Labs show ↑PT/aPTT, ↓fibrinogen, ↓platelets, ↑D-dimer, schistocytes. Treatment is treating the sepsis itself — and DIC roughly doubles a septic patient’s mortality.

The nurse’s lever is upstream: rigorous trending (urine output, mentation, SpO₂, lactate) catches each failing organ early, and every bundle element delivered on time is MODS prevention.

Ventilated septic patients get lung-protective settings with plateau pressure < 30 cm H₂O — the same capillary-leak physiology that drives shock also drives lung injury.

The distinction decides whether an antipyretic can possibly work. "In FEVER, there is an increase in the set-point temperature brought about by the hypothalamus, enabling the body to maintain a CONTROLLED increase… In HYPERTHERMIA, the rise in core temperature is BEYOND the confines of the set-point temperature and regulation of the hypothalamus," and "the thermoregulatory set-point remains unaltered at normothermic levels." Named causes include heat exhaustion and heat stroke, obesity, metabolic conditions, and adverse drug reactions — malignant hyperthermia and neuroleptic malignant syndrome — with those under 4 and over 65 at increased risk.

"Exceptionally high fever, which can occur in patients with severe infections… also seen in patients with CNS hemorrhages and associated with a POOR OUTCOME," and capable of causing "increased intracranial pressure, ischemic brain injury, exacerbation of cerebral edema, and death." The sourced bands put it above the high-grade range of 39.1 to 41 °C.

This is the single most important negative finding on the page. "During infections, FEVER MAY NOT BE OBSERVED IN BABIES, OLDER ADULTS, PATIENTS WITH CHRONIC KIDNEY DISEASE, OR PATIENTS TAKING CORTICOSTEROIDS; instead, HYPOTHERMIA MAY BE PRESENT." The shipped sepsis page makes the same point from the other direction — an infected patient can be cold, not febrile — and this page supplies the four named populations.

"SEPSIS accounts for up to 74% of fever in hospitalized patients. MALIGNANCY, TISSUE ISCHEMIA, AND DRUG REACTIONS account for most of the remainder." That single proportion is the sourced reason an inpatient fever is worked up as sepsis until something else explains it — and the sepsis page owns the recognition criteria and the bundle.

The mechanism is already on this page: TLR4 recognises gram-negative lipopolysaccharide, signalling through NF-κB; complement, bradykinin, prostaglandins and cytokines are released; vasodilation and permeability that are useful in one limb become catastrophic across a whole circulation. The recognition criteria, the Sepsis-3 definitions and the bundle belong to the sepsis page and are not restated here — what this page adds is why those criteria describe a coherent physiological state, and the four populations who may not mount the fever that would trigger them.

The distinction from fever is what decides the treatment. In hyperthermia and hyperpyrexia, "the thermoregulatory set-point remains unaltered at normothermic levels, while body temperature elevates in an UNCONTROLLED manner and beyond the capacity to lose heat" — so an antipyretic, which works by lowering a raised set-point, has nothing to lower. Named causes include heat exhaustion and heat stroke, malignant hyperthermia and neuroleptic malignant syndrome, with the youngest and oldest patients at greatest risk.

A "rapidly progressive, life-threatening necrotizing infection caused by gas-forming bacteria, most commonly Clostridium species." Mortality is highest with leukocytosis, hyperglycemia or sepsis. Early findings can be nonspecific: "Patients often have a recent history of trauma or surgery, though nonspecific early findings can delay diagnosis. A typical presentation may include severe pain disproportionate to physical findings" — crepitus may appear only "As the condition progresses."

Gas gangrene "carries a high mortality rate, particularly in patients with leukocytosis, hyperglycemia, or sepsis." Crepitance in a wound is an emergency call, not a finding to chart and recheck.

Open RN: "Instances of sudden, severe pain or chest pain/pressure require immediate notification or contact of emergency services."

Opioid overdose. Open RN: "If the person does not respond, call 911 or obtain emergency assistance." "Naloxone should be administered to anyone suspected of an opioid overdose."

Naloxone "immediately reverses all analgesic effect." In hospital, AHRQ: "Naloxone must be titrated carefully" — too much, too fast can cause severe pain, hypertension, tachycardia, ventricular dysrhythmias, pulmonary edema and cardiac arrest. After community overdose, give a second dose if there is no response within 2–3 minutes and monitor for at least 4 hours: "Because naloxone has a relatively short duration of effect, overdose symptoms may return."

CNS dysfunction marks heat stroke. NIOSH: "Call 911 for emergency medical care." CDC flyer: "Call 911 right away-heat stroke is a" medical emergency.

CDC lists "Hot, red, dry, or damp skin"; in exertional heat stroke "prolonged sweating may continue after exercise has stopped." Sweating does not rule it out.

CDC: "Get medical help right away if:" "You are throwing up," "Your symptoms get worse," "Your symptoms last longer than 1 hour." Heat exhaustion "can progress to life-threatening heatstroke."

Muscle breakdown releasing myoglobin and potassium. NIOSH: "Seek immediate care at the nearest medical facility."

"altered mental status in a patient with normal body temperature and a history of taking in large volumes of water suggests hyponatremia." "Treating clinicians should restrict fluid if hyponatremia is suspected."

Cold slows the brain; the person may not recognize the danger. CDC: "Hypothermia is a medical emergency."

CDC: "If it is below 95° F, get medical attention immediately!"

Late hypothermia (NIOSH) — moderate to severe; dysrhythmia risk rises. "A person with severe hypothermia may be unconscious and may not seem to have a pulse or to be breathing."

CDC infant warning signs; newborns cannot shiver.

Compartment syndrome signs "should also prompt urgent fasciotomy" — though "the classic signs may be unreliable because affected extremities may be insensate."

"Gangrenous tissue can progress from dry gangrene to wet gangrene, increasing the risk of sepsis"; "sepsis caused by wet gangrene warrants earlier surgical debridement."

CDC: "In some cases, hypothermia victims who appear to be dead can be successfully resuscitated."

Hypoxia "rapidly leads to loss of consciousness, apnea, and hypoxic cardiac arrest" (StatPearls). "Rescue breaths should be initiated promptly for apneic patients"; BLS "should be initiated immediately" with emergency department transport for anyone given any resuscitation (StatPearls).

StatPearls: "Rarely, victims with normal initial chest radiography may develop fulminant pulmonary edema within 12 hours, potentially reflecting delayed ARDS, neurogenic edema, or airway hyperreactivity."

StatPearls (Hypothermia): patients with moderate or severe hypothermia "should be handled gently because rough movement may increase myocardial irritability and precipitate fatal dysrhythmias."

StatPearls: "Survivors may still suffer severe neurologic sequelae, including persistent vegetative state, due to prolonged cerebral hypoxia." "Among children with brain injury, 10% to 30% require long-term rehabilitation."

StatPearls: "In hemodynamically unstable patients, extracorporeal membrane oxygenation may be considered as salvage therapy for refractory hypoxemia or severe hypothermia."

NIOSH: "Seek emergency medical attention as soon as possible to start antivenom (if needed) and stop irreversible damage." "Do not wait for symptoms to appear; get medical help right away."

StatPearls: "5 to 10% of envenomations result in life-threatening coagulopathies." Neurotoxicity can progress to "respiratory failure secondary to obstruction or paralysis of the diaphragm." NIOSH: "In extreme cases, breathing may stop."

StatPearls: patients need "Clear guidance on when to seek emergency care, such as for bites involving the face, hands, or genitals, or those with extensive tissue damage." Head, neck and face bites "have a high mortality, especially in children"; "Chest bites pose a risk for pneumothorax and spinal cord injury."

StatPearls: "Once symptoms manifest, the infection has an almost 100% fatality rate." Early illness is "vague, febrile" with "pain and paresthesias at the wound site."

StatPearls: in children "the systemic reaction is more severe" and can include "hemolytic anemia, thrombocytopenia, organ failure, disseminated intravascular coagulation, seizures, and death." "Hemolysis has been reported up to 7 days after spider bite."

StatPearls: "Antivenom should be administered within four hours, or as soon as possible thereafter, from the snakebite for optimal effect. Antivenom administration is intravenous." Resuscitation includes "intubation for those with respiratory distress or paralysis and IV fluids for those exhibiting signs of shock." "There is no evidence of the empiric use of blood products, such as platelets or fresh frozen plasma."

The retinal vessels are being injured by the pressure — a target-organ cue that pushes the crisis toward emergency.

Direct visual evidence of emergency-grade vascular damage — the retina is the one vascular bed the clinician can actually see.

Loss of cerebral autoregulation — the hallmark of hypertensive emergency — is producing encephalopathy. Altered LOC is a report-immediately finding.

The pressure-loaded myocardium is ischemic — MI and unstable angina are on the target-organ-damage list that defines emergency.

Acute LV failure with pulmonary edema: the left ventricle cannot eject against the abruptly raised resistance and blood backs into the lungs.

The hypoperfused, pressure-injured kidney is failing acutely — renal failure is target-organ damage, and falling urine output is one of its earliest bedside signals.

The nurse’s frame: frequent BP checks knowing the prescribed target, serial neuro checks, and titratable IV agents — lower MAP by no more than 20–25% in the first 1–2 hours, then toward 160/100 over 2–6 hours, then to ~130–140 systolic over 24–48 hours. Untreated hypertensive emergency carries a reported 1-year mortality above 79%; treated in-hospital mortality is ~10%.

IV beta-blockade (esmolol) is first-line here — the one crisis where beta-blockers lead. (An older convention says "below 140"; the newer crisis literature says ≤ 120.) Anticipate CT angiography and rapid escalation.

Ischemic stroke eligible for thrombolysis: BP must be < 185/110 before lysis and kept < 180/105 for 24 hours. Hemorrhagic stroke: SBP reduction to < 140 may improve outcomes. Nicardipine is favored in acute stroke.

Severe pregnancy hypertension: IV hydralazine or oral nifedipine. Eclampsia adds magnesium sulfate — 4–6 g IV load then 1–2 g/h — with deep-tendon-reflex and respiratory monitoring for magnesium toxicity.

The pattern has broken: a nonocclusive thrombus on a disrupted plaque — unstable angina, which can progress to complete occlusion.

These are the patient-facing red flags that separate "angina" from "possible infarction in progress."

Relief that doesn’t hold is not relief — pain that keeps coming back despite nitroglycerin may be unstable angina, a medical emergency.

The accompaniments of unstable angina. Any pain, pressure, tightness, or discomfort in the chest, neck, arms, shoulders, upper abdomen, or back counts.

The heralding cue is a change in the established pattern — stronger, more frequent, longer, at rest, or no longer relieved. The nurse’s move: treat it as ACS — stop activity, emergency evaluation, 12-lead ECG, troponin. This clot can complete the occlusion at any time.

MI survivors carry an annual mortality 5–6× higher than people without CAD — which is why the unglamorous work of aspirin, statins, and risk-factor control is the treatment. Chest pain at rest, pain > 15–20 minutes, or pain unrelieved by nitrates gets 911, not observation.

This is why acute chest pain gets a continuous cardiac monitor: the point is to catch arrhythmias and ischemic changes while they are still catchable. New palpitations or an irregular rhythm during an episode is a report-immediately finding.

A thrombus on a disrupted plaque is starving myocardium of oxygen. Ischemic cardiac pain is pressure-like and poorly localized — patients often call it discomfort rather than pain — and it may radiate to the jaw, neck, either shoulder, one or both arms, the back, or the upper abdomen.

Women, older adults, and patients with diabetes or renal insufficiency infarct without the textbook script: women often present with abdominal pain or dizziness, elderly patients with shortness of breath. The nurse who waits for crushing chest pain in these patients misses the MI.

The three classic faces of unstable angina — a plaque has destabilized, and progression to infarction may be imminent even while troponin is still normal.

Pain that outlasts maximal venodilation means the occlusion is not yielding — the teaching line is “no relief after 3 doses: call 911.”

Ischemic and infarcting myocardium is electrically unstable; lethal ventricular arrhythmias dominate the acute phase and are the reason for continuous ECG monitoring.

The heralding cue of cardiogenic shock — the infarcted ventricle is failing as a pump and can no longer hold the pressure it arrived with.

Think mechanical catastrophe: papillary muscle rupture causing acute mitral regurgitation, or ventricular septal rupture — first-week emergencies that need the surgeon, not the next scheduled assessment.

A mural thrombus formed on the infarcted wall has embolized — or output has fallen critically. Either way it is on the report-immediately list.

This is why the patient goes on a continuous monitor immediately and stays on it — early CPR and defibrillation are the major determinants of surviving an arrest. Sudden-death risk stays highest through the first months post-MI.

Emergency revascularization of the culprit vessel is indicated; a microaxial flow pump is considered in selected patients. The nurse’s move is recognizing the pressure trend early and escalating — not chasing it with fluids on autopilot.

Each needs emergent surgery. The bedside cue that buys the patient a chance is auscultation: a sudden new loud murmur in the first week post-MI is a call-now finding, never a “note for rounds.”

Alveoli flooding with protein-rich fluid — acute pulmonary edema, not "bad congestion." Sit the patient up and get help now.

The brain is losing perfusion — a low-output warning sign, and one of the findings that must be reported immediately.

The nurse’s first moves are positional and fast: high-Fowler’s with legs dependent (drops preload), oxygen per protocol, rapid-acting IV diuretics as ordered, and an immediate provider/rapid-response call. Minutes matter.

The end-stage of the vicious cycle — the compensations have nothing left to squeeze. Managed in critical care with inotropes and vasopressors (see the vasopressors class page).

This is why an ICD is offered for primary prevention at LVEF ≤ 35% (NYHA II–III) — and why any new irregular, very fast, or very slow rhythm gets reported.

A transient collapse of cardiac output — rapid rates gut preload and stroke volume; escape rhythms below 45–50 bpm can’t sustain cerebral perfusion.

Coronary hypoperfusion from low output — and one of the unstable criteria that turns a tachyarrhythmia into a synchronized-cardioversion decision.

Poor filling backs blood into the lungs while output falls — another unstable criterion; worsening heart failure is also a face of symptomatic bradycardia.

The rhythm is no longer perfusing the brain and vital organs — unstable criteria; prepare for immediate synchronized cardioversion (tachycardia) or atropine/pacing (bradycardia).

An atrial thrombus has embolized — afib is the leading cardiac cause of stroke. Emboli can also occlude peripheral vessels, so check peripheral pulses.

An arrest rhythm: VF/pulseless VT (disorganized or futile ventricular activity → cessation of output), asystole, or PEA. Begin high-quality CPR and get the defibrillator.

Minutes decide this: prompt defibrillation carries 39.3% survival vs 22.2% when delayed ≥ 2 minutes. Pulseless patient → high-quality CPR with interruptions < 5 seconds, defibrillate VF/pVT at 120–200 J biphasic, epinephrine 1 mg IV every 3–5 minutes; bring the ACLS cart, place leads, assign a documenter.

The defense is the CHA₂DS₂-VASc score: the 2023 ACC/AHA/ACCP/HRS AF guideline anticoagulates once estimated annual stroke risk is ≥ 2%/year — conventionally ≥ 2 in men / ≥ 3 in women. Teach every afib patient the stroke signs and to return immediately; check peripheral pulses too — emboli can occlude limb vessels.

Initiate pacing as soon as Mobitz II is identified — these infranodal blocks often do not respond to atropine. Third-degree block: transcutaneous then transvenous pacing; most patients leave with a permanent pacemaker.

First-line is IV magnesium — 2 g slow IV push, then infusion; unstable with a pulse → synchronized cardioversion; pulseless → defibrillate; overdrive pacing for refractory runs. Your job upstream: flag the QTc and the culprit drug before the run happens.

Complete thrombosis of the limb’s venous outflow — the most severe form of acute DVT, with venous hypertension and microvascular thrombosis that can progress to venous gangrene.

The clot has dislodged and lodged in the pulmonary vasculature, cutting gas exchange — the leading symptom of embolization.

The embolus irritates the pleura over the infarcting lung segment; paired with sudden dyspnea it completes the classic PE cue cluster.

Obstructed pulmonary flow strains the right heart and drops output; syncope in PE tracks with a higher prevalence of hemodynamic instability.

Infarcted, congested lung tissue bleeds into the airways — one of the report-immediately PE cues patients must be taught before discharge.

Massive PE: the obstructed pulmonary circuit overwhelms the right ventricle — distended neck veins, parasternal lift, S3, and collapse. A PE can develop quickly, even without noticeable DVT symptoms.

The most common preventable cause of in-hospital death — and the reason the whole prevention apparatus exists. 30% of untreated patients die versus 8% with timely therapy, so the cue cluster is treated as a now-emergency: get help immediately. A PE can develop quickly, even without noticeable symptoms of a DVT.

Severe venous hypertension with collateral and microvascular thrombosis can progress to venous gangrene, particularly with warfarin-mediated protein C depletion in cancer or heparin-induced thrombocytopenia. Escalate immediately.

Murmur intensity tracks stroke volume; when the LV fails, less blood crosses the valve and the murmur fades. A quieter murmur plus hypotension is a decompensating ventricle, not improvement.

Aortic dissection, endocarditis, or trauma dumps volume into a non-dilated LV; end-diastolic pressure spikes, the mitral valve closes prematurely, and the patient heads toward cardiovascular collapse. A medical emergency requiring urgent imaging and cardiothoracic surgery evaluation.

Thrombus from the enlarged, fibrillating left atrium or from a mechanical valve with a subtherapeutic INR has embolized to the brain — or a vegetation has fragmented in endocarditis. Stroke workup now.

Papillary muscle rupture → acute MR: the non-compliant left atrium cannot buffer the regurgitant volume, cardiac output collapses, and the lungs flood. Cardiogenic shock — urgent surgery.

Thrombus on the prosthesis — especially when the INR has been subtherapeutic — is jamming the leaflets. Prosthetic valve thrombosis is a surgical emergency.

A non-dilated chamber cannot buffer sudden volume, so there is no compensated phase. Acute MR gets afterload reduction, an intra-aortic balloon pump, and urgent surgery; acute AR gets urgent surgery but no balloon pump (it worsens the leak). A new murmur with hemodynamic collapse is a rapid-response call.

Acute valvular incompetence (about one-third of cases) floods the lungs; acute aortic regurgitation can precipitate pulmonary edema and cardiogenic shock within hours. Heart failure is the most common serious complication and the leading reason for surgery.

Tachycardia and tachypnea reflect systemic infection. Hypotension means septic or cardiogenic shock — especially with acute leaflet perforation — and is a rapid-response finding.

A left-sided vegetation fragment has reached the brain: embolic stroke, ruptured mycotic aneurysm, brain abscess, or meningitis. Symptomatic neurologic events occur in roughly 1 in 4–5 patients, silent lesions in far more. Stroke pathway — but thrombolysis is not indicated for IE stroke because of hemorrhage risk.

Acute valvular incompetence occurs in about one-third of cases and heart failure in about 27% of aortic-valve IE. It is the most common serious complication and the first item on every surgery-indication list — a new murmur with breathlessness is a same-hour escalation, not a note for rounds.

Emboli complicate about 25% of IE (20–50% in left-sided series); symptomatic neurologic events strike 15–30% and independently predict death. Mycotic aneurysms (1–9%) are usually silent until they rupture into intracranial hemorrhage. Risk features: vegetation > 10 mm, mobile, mitral, S. aureus. Most embolic risk falls once effective antibiotics start — so delay after cultures raises it. Thrombolysis is not indicated, and anticoagulants and antiplatelets are held at least 2 weeks after intracranial hemorrhage.

Compensation has failed: rising intrapericardial pressure limits ventricular filling, stroke volume collapses and arterial pressure follows. Hypotension with an elevated JVP is the obstructive-shock pattern shared by tamponade, tension pneumothorax and massive pulmonary embolism — all needing urgent intervention.

Impaired right-heart filling backs blood up into the venous system. Assess at a 30–45° head-of-bed angle: the vertical height of the venous column above the sternal angle plus 5 cm estimates right atrial pressure (normal 1–8 cm H₂O).

Fluid between the heart and the chest wall dampens the sound. With hypotension and JVD this completes Beck’s triad — classic, but present in only a minority of tamponade patients.

Ventricular interdependence: the pressurized sac stops the right ventricle from expanding on inspiration, so the septum bows into the left ventricle and left-sided stroke volume falls with each breath. Sensitivity above 80% for tamponade in a patient with an effusion; absence does not exclude it.

Hypoperfusion of skin, kidneys and brain as cardiac output falls — the multiorgan face of obstructive shock and, per the nursing chapter, part of the escalation list alongside low blood pressure and diminished heart sounds.

Ventricular free-wall rupture bleeding into the pericardium — rapid hemorrhage that tamponades the heart with only 100–150 mL. Risk is highest after a first anterior or transmural infarct, with ST elevation on the initial ECG, in women, and over age 70.

Rising intrapericardial pressure stops the right heart from filling; when sympathetic compensation fails, cardiac output collapses. Untreated tamponade is universally fatal. Escalate immediately; the only definitive treatment is drainage (echo-guided pericardiocentesis, or surgery for purulent or bleeding causes).

Risk rises with large effusions plus ventricular dysfunction, large malignant effusions, and rapid removal of more than 1 L. It is the reason drainage is staged: remove enough to relieve tamponade, then leave the catheter to drain gradually. New hypotension or crackles after the drain is a report-immediately event, not an expected settling.

Hematoma or retained shed blood (clogged chest tubes — up to 36% of patients) compresses the heart inside the confined sac. Anticoagulation, valve surgery, transfusion, re-intervention within 48 h and a higher post-op creatinine raise the risk; early echo sensitivity is poor (36.8%) and the chest film can be normal. Treatment is a subxiphoid window, guided pericardiocentesis, or re-sternotomy for clot; mortality runs about 11–30%.

Secondary infection of necrotic tissue, common in diabetics, spreads rapidly and seeds sepsis — treatment within 24 hours significantly improves survival.

Acute arterial occlusion (thrombosis or embolus) has cut off flow. Skeletal muscle tolerates ischemia for about 4–6 hours — a vascular emergency diagnosed at the bedside with a handheld Doppler, not after imaging.

Rutherford class IIb, immediately threatened — sensory loss precedes motor loss, so weakness means the window is closing. Complete anesthesia plus paralysis with no venous Doppler signal is class III, already nonsalvageable.

The leg is where the atherosclerosis is visible; the coronary and carotid beds carry the same plaque. This is why every symptomatic PAD patient is on an antiplatelet and a statin regardless of LDL, and why the heart and brain are part of every PAD plan: the plaque in the leg usually means plaque that can cause a heart attack or stroke.

Evaluate on an emergency basis; IV unfractionated heparin on diagnosis unless contraindicated; revascularization (surgical thromboembolectomy, catheter-directed thrombolysis, or mechanical thrombectomy) to prevent amputation in a salvageable limb — a class III limb is amputated, not revascularized. Even with rapid treatment, 1-year morbidity and mortality after ALI are high.

Free radicals released on reperfusion make capillaries leaky; pressure in the closed compartment strangles venous outflow, then arterial inflow. Absolute compartment pressure ≥ 30 mm Hg or a delta pressure (diastolic BP minus compartment pressure) ≤ 30 mm Hg confirms it. Fasciotomy ideally within 6 hours; sequelae include rhabdomyolysis, Volkmann contracture, infection, amputation, and death. Keep the limb at heart level and remove constrictive dressings immediately.

A symptomatic unruptured AAA is a wall under acute strain — these are the high-risk signs of impending rupture. Tenderness to palpation over the aneurysm warrants expedited repair; the guideline pathway is ICU admission with arterial BP monitoring and repair within 24–48 hours.

Hemorrhage into the retroperitoneum produces hypovolemic shock; the abdomen may be diffusely painful and distended. Most ruptures are retroperitoneal, where ultrasound cannot reliably see them — the picture, not the scan, makes the call. Mortality is 80–90%, and more than half of patients die before reaching the ED.

The aneurysm has eroded into a neighbor: an aortoenteric fistula bleeds into the gut, an aortocaval fistula shunts aortic flow straight into the vena cava and overloads the heart.

The intimal tear and the blood splitting the media happen in an instant, so the pain peaks within minutes rather than building like ischemic pain. Anterior chest pain points to the ascending aorta, back pain to the descending; pain migrates as the dissection extends. ACC/AHA notes that "sharp/stabbing" is actually reported more often than "tearing/ripping" — the abrupt maximal onset is the discriminator.

The flap or a compressed false lumen chokes flow into a branch artery (subclavian, iliac, femoral), so the pressure and pulse on that side fall. The guideline rule: measure BP in both arms and both legs. It is a red flag, not a screen — this and the other classic signs appear in fewer than 50% of confirmed dissections, so their absence excludes nothing.

Dissection into the root tethers the valve leaflets or prolapses a cusp, so the valve no longer closes — AR commonly accompanies type A dissection, and acute severe AR is one route to shock.

Carotid or vertebral involvement causes stroke; syncope signals carotid compromise or tamponade; spinal or intercostal malperfusion causes paraplegia; compression of the sympathetic chain gives ptosis-miosis-anhidrosis, and of the recurrent laryngeal nerve, hoarseness.

Each is a branch vessel obstructed by the flap — renal, mesenteric, iliac, or coronary. Malperfusion syndrome raises dissection mortality from about 6% to over 30% and converts an uncomplicated type B into a complicated one that needs intervention.

Dissection normally presents hypertensive; hypotension is a grave sign meaning rupture, cardiac tamponade, acute severe AR, or myocardial ischemia. Stop titrating the antihypertensives and call for help now.

Rupture mortality is 80–90%, and most patients never reach the hospital. For those who do, the ACC/AHA pathway is a rupture protocol: a hemodynamically stable patient gets a CT to judge endovascular suitability and goes to rEVAR over open repair when anatomy allows, under permissive hypotension — deliberately not driving the pressure up, because higher pressure means faster bleeding — with door-to-intervention under 90 minutes the goal. Rupture into the pericardium in type A dissection presents as tamponade instead.

Retrograde extension into the root and pericardium is why type A is an emergency surgical diagnosis, not a medical one: mortality climbs 1–2% per hour untreated, and medical management carries 2–3 times the mortality of surgery. Any of these findings in a dissection patient means the dissection has reached the heart — escalate immediately; do not treat the hypotension by pushing more vasodilator or by aggressive fluids.

"Delayed SCI may occur up to 2 weeks after surgery," so lower-extremity motor and sensory checks continue long after the ICU. Early recognition matters because the deficit can be reversed: the cord-perfusion bundle is a cerebrospinal fluid drain, MAP raised above 100 mm Hg, transfusion to hemoglobin > 10 g/dL, volume, and cardioversion of tachyarrhythmias — which is why post-repair hypotension and anemia are treated as spinal emergencies, not inconveniences.

Either dynamic obstruction dropping output or a ventricular arrhythmia; recent unexplained syncope is an ICD-level sudden-death risk factor. Treat exertional syncope as an emergency.

Catecholamine stunning mimics a STEMI — ST elevation, troponin rise — and it cannot be told apart without coronary angiography.

Blood stagnating in a ballooned apex or a dilated, poorly contracting chamber forms thrombus that can embolize to the brain.

Severe systolic dysfunction can present as fulminant failure — the emergency end of the PPCM spectrum.

An ICD is considered for anyone with risk factors: recent unexplained syncope, HCM-related sudden death in a close relative, an apical aneurysm with scarring, frequent or prolonged VT on monitoring, extensive late gadolinium enhancement, or massive LVH (> 30 mm). The ICD is credited with most of the fall in HCM mortality over 20 years — but it is not placed solely so someone can play competitive sport.

In takotsubo the treatment depends on the outflow tract: shock without outflow obstruction gets inotropes; shock with outflow obstruction must avoid inotropes — phenylephrine is the pressor of choice, often with a beta-blocker.

NHLBI lists stroke among the complications for this reason. Any new focal neurologic sign is an emergency.

NHS: the bandage must be removed or cut off if these occur; "Once you remove the bandage, make sure you keep your leg highly elevated and contact your doctor or nurse as soon as possible."

NHS directs anyone with bleeding varicose veins to urgent help; heavy bleeding is an emergency.

NIAMS: "It is important to see a health care provider right away if you develop visual symptoms, because if left untreated, they can lead to permanent vision loss within hours or days." StatPearls: transient visual loss is "an early warning sign of permanent visual impairment, necessitating urgent attention." "Diplopia is a highly specific indicator of the disease."

"Small-vessel vasculitis often produces life-threatening complications, eg, alveolar hemorrhage, renal failure, and intestinal ischemia."

"Timely initiation of glucocorticoids is crucial to prevent blindness" (StatPearls). Clinicians "begin glucocorticoid therapy as soon as the diagnosis of GCA is suspected" (StatPearls, citing ACR 2021). Even so, vision "loss can progress despite glucocorticoid therapy in nearly 10% of patients" (StatPearls).

Narrowed airways make exhalation slow and effortful; hypoxemia and work of breathing drive the rate up. In a known asthmatic in distress, these mark a severe exacerbation.

When tidal breaths are this hard to move, speech loses its air supply and the patient recruits posture and neck muscles to breathe — the visible severity markers of a severe exacerbation.

Severe air trapping swings intrathoracic pressure hard enough to dent stroke volume with every inspiration — a severe-exacerbation finding you can measure on the monitor.

Wheeze requires moving air. As obstruction worsens, alveolar airflow falls until there is nothing left to whistle — absence of wheezing signals worsening obstruction, not improvement. No air entry on auscultation is a pre-arrest emergency.

Systemic hypoxia has reached the visible tissues — a late sign that oxygenation has failed, and one of the taught 911 triggers.

The hypoxic, hypercarbic brain is failing. GINA lists drowsiness and confusion — alongside silent chest — as the criteria for ICU transfer.

A late finding: the pO₂ holds until compensation fails, so a normal saturation early in an attack is not reassurance — and a falling one means you are behind.

The nurse’s move is recognition plus immediate escalation: a quieter chest in a still-distressed asthmatic is worsening obstruction, not improvement. GINA: transfer to intensive care if the patient is drowsy, confused, or has a silent chest. Stay with the patient, call for help, and prepare for ICU-level care.

Anticipate escalation: IV magnesium sulfate 2 g over 20 minutes for inadequate response to intensive initial treatment (FEV1 < 25–30% predicted; not routine), and intubation for respiratory arrest, severe obtundation, frank fatigue with gasping or inability to speak, persistent hypoxia despite multimodal treatment, or worsening respiratory acidosis — ketamine is the preferred induction agent.

Status asthmaticus can end in respiratory or cardiac arrest and end-organ dysfunction; adult ICU mortality is roughly 10%. Sudden deterioration in a ventilated or severely trapped patient should raise tension pneumothorax on the differential.

Bracing the arms stabilizes the shoulder girdle so the sternocleidomastoid and scalenes can pull the sternum, clavicle and rib cage upward to assist ventilation. A recognized field sign of obvious respiratory distress and impending failure.

Rising CO₂ depresses the brain — early CO₂ narcosis. Drowsiness in a COPD patient on oxygen is an ABG, not a nap.

The nurse’s move: treat new drowsiness or confusion as a stat-ABG finding, titrate oxygen back toward SpO₂ 88–92% (never off), and anticipate NIV for hypercapnic respiratory failure. Remember the chronic retainer may not look sick until PaCO₂ is extreme.

Sudden new unilateral chest pain with abruptly worsening dyspnea in an emphysema patient is a collapsed lung until proven otherwise — rapid assessment and immediate provider notification.

The herald of pneumonia progressing to sepsis and septic shock — this trio is a report-immediately emergency, not a “continue to monitor.”

The heralds are hypotension or unstable hemodynamics, altered mental status, and worsening hypoxia — report immediately and anticipate rapid response. Hypotension is one of the early-deterioration signs, and septic shock needing vasopressors is ICU-level illness.

Respiratory failure needing mechanical ventilation is ICU-level illness — and a respiratory rate above 30 or a P/F ratio ≤ 250 is already an early-deterioration sign. Breathing that turns harder, faster, or shallower with falling SpO₂ is a report-immediately cue — do not wait for the ABG to prove it.

Dead-space ventilation and V/Q mismatch drop oxygenation abruptly — the most common symptom (73% in PIOPED). Acute and severe in central PE; may be mild and transient with a small peripheral embolus.

The alveoli are open and dry — the problem is perfusion, not ventilation. Unexplained hypoxemia with a normal chest exam should raise suspicion for PE, not lower it.

A transient collapse of left-heart filling. Syncope with PE is associated with higher rates of hemodynamic instability and RV dysfunction — treat it as a marker of a big clot.

The acute RV-failure picture of massive PE — the right heart is losing against the obstructed pulmonary bed. PE is reportedly behind roughly 8% of sudden cardiac arrests.

This is the thrombolytics scenario — systemic thrombolysis is the treatment of choice for hemodynamically unstable PE. The nurse’s part: recognize the heralds, call the rapid response, and know that aggressive IV fluids are not routine here — over-filling worsens RV overload; vasopressors may be needed instead.

Large-vessel erosion or airway obstruction — among TB’s named emergencies, alongside septic shock. Get help now.

Any hemoptysis is reported; massive hemoptysis or obstructed breathing is a rapid-response call. The patient is still on airborne precautions — responders wear fit-tested N95s even while moving fast.

Highest risk when immunity is lowest: HIV with CD4 < 200 cells/mm³, immunosuppressive therapy, diabetes, CKD, advanced age. A deteriorating, febrile, immunocompromised patient with known TB infection is this until proven otherwise.

Right-to-left intrapulmonary shunt: flooded and collapsed alveoli are perfused but not ventilated, so raising FiO₂ cannot oxygenate the blood streaming past them. Persistent hypoxia is a report-immediately cue.

Severe hypoxemia has desaturated enough hemoglobin to show through the skin — a late, high-severity cue.

Cerebral hypoxemia, with or without hypercapnia, depresses consciousness; "unresponsive" heads the nursing when-to-seek-help list.

Positive pressure cuts venous return and cardiac output, worst in sepsis or hypovolemia; right-ventricular failure and the underlying sepsis add to it. On positive-pressure ventilation, new hypotension is investigated for pneumothorax.

Barotrauma: a ruptured alveolus has become a pneumothorax, and under positive pressure it can tension within minutes — tracheal deviation and subcutaneous crepitus confirm it. Clinical diagnosis; needle decompression does not wait for the X-ray.

Alveolar rupture under high pressure (risk climbs with plateau above 35, high tidal volume and auto-PEEP) leaks air into the pleural space, and positive pressure keeps pumping it in until the mediastinum shifts and venous return stops — death within minutes. Tension pneumothorax is a clinical diagnosis: urgent needle decompression, then a chest tube. Do not wait for the chest radiograph. Chest-tube kits stay at the bedside when PEEP is high; barotrauma raised mortality from 39% to 51% in a 361-ICU cohort.

Hypoxic vasoconstriction, overdistension, microthrombi and hypercapnia all raise pulmonary vascular resistance; the RV fails against it in 21–50% of ventilated ARDS patients, and the RV-failure phenotype carries a reported 78% mortality. Prone positioning unloads the RV; norepinephrine and epinephrine raise its contractility. Report hemodynamic deterioration as the vent settings change.

Work-of-breathing cues: the neck and intercostal muscles are recruited when the diaphragm can no longer generate enough ventilation alone; the tripod posture braces the shoulder girdle to help them. These are act-now signs of distress, and a patient who cannot finish a sentence is running out of reserve.

The hypercapnia trap: "some clients with hypercapnia may not initially exhibit changes in their vital signs. Instead, they may present with increased sedation or somnolence and decreased respiratory depth or rate." Supplemental oxygen keeps the saturation normal while CO₂ climbs; as it worsens "the client will become increasingly unstable and may experience respiratory arrest."

"Confusion or loss of consciousness (LOC) — this is a worsening sign." Severe hypoxia and severe hypercapnia both end in altered mentation and coma; a patient who was restless and is now quiet has not improved.

A late sign: color changes only when deoxygenated hemoglobin exceeds about 5 g/dL, roughly an arterial saturation under 80–85%. Anemia masks it and polycythemia exaggerates it, so its absence never rules out hypoxemia.

The pump is giving out. In status asthmaticus a falling rate and depth, inability to speak, and a PaCO₂ that "may falsely normalize as fatigue reduces respiratory effort" signal impending arrest — prepare for NIV or intubation rather than mistaking the quiet for improvement.

Severe CO₂ retention destabilizes neuronal membranes and cerebral perfusion; asterixis and papilledema on exam point to hypercapnia specifically. Any of these in a patient at risk of retention is an emergency ABG-and-escalate finding.

Together these "form the opioid overdose triad." Severe depression is "shallow breathing, hypopnea, and bradypnea, with a respiratory rate of 4 to 6 breaths per minute." Caution: miosis is not present in every overdose — meperidine, morphine, and propoxyphene can leave pupils midpoint or dilated, so never let normal pupils argue you out of the other two signs.

CO₂ is a CNS depressant, so retention breeds more retention. There is no single PaCO₂ that defines narcosis — the picture is qualitative and the trend is what counts. Intubated AECOPD carries an in-hospital mortality of about 38%, which is why the NIV window (pH ≤ 7.35 with a raised PaCO₂) is treated as urgent, not optional.

Two lung threats stack on the central one: a leaky pulmonary capillary bed and an unprotected airway. Position and suction the obtunded patient, support ventilation with a bag-valve mask on 100% oxygen before naloxone, and expect precipitated withdrawal with vomiting in a subset once reversal takes hold — another aspiration risk.

Positive pressure "elevates intrathoracic pressure, leading to decreased right ventricular preload" — check the BP after every pressure change and keep IV access ready. Sudden deterioration on the ventilator runs the DOPES list: Displacement, Obstruction, Pneumothorax/PE/pulmonary edema, Equipment failure, Stacked breaths. "A ventilator alarm should never be ignored or silenced without first checking the problem."

The one-way valve is raising intrapleural pressure with every breath; the lung is collapsing and gas exchange is failing while the circulation still compensates. This is the window in which decompression is a rescue rather than a resuscitation.

The mediastinum has shifted and the superior vena cava is compressed — venous return and cardiac output collapse (obstructive shock). Tracheal deviation is late and unreliable; it is a clinical diagnosis, and imaging must not delay decompression.

Positive pressure is pumping air through a pleural leak into a closed chest; the machine feels the rising intrathoracic pressure before the exam shows it. Ventilator-associated tension frequently proves fatal — treat the alarm as the cue.

The drain has stopped doing its job — occlusion, kink, dependent loop, clamping, or malposition lets air re-accumulate and the tension chain restarts. Report immediately.

Blood occupies the pleural space and compresses the lung, while up to 40% of the circulating volume can drain into one hemithorax — hypovolemic shock from lost preload. Flat neck veins distinguish it from the distended veins of tension.

A segment of ribs broken in two places sinks inward on inspiration as the rest of the chest expands — ineffective ventilation on top of the contusion beneath. Splinting can mask it, so it may only appear after extubation or once the intercostal muscles fatigue.

Bright-red high-volume output signals vascular injury that may need surgical repair; an abrupt stop early on suggests dislodgement or a clot occluding the tube, letting air or blood re-accumulate. Both are report-now findings.

The nursing precipitants are all plumbing: a clamped, kinked, or looped chest tube, a dislodged-tube site sealed on all four sides over an ongoing leak, or positive-pressure ventilation, NIV, or high-flow nasal cannula applied to an undrained pneumothorax. Delays in diagnosis and intervention are strongly associated with poor outcomes — decompress on clinical suspicion.

One hemithorax can hold about 40% of the circulating blood volume, so the collection chamber is a hemorrhage monitor. Those thresholds are the trigger for thoracotomy; blunt-mechanism hemothorax carries a 9.4% mortality, and outcome depends on the cause, the volume lost, and how quickly treatment is given.

A very large effusion (these signs correlate with more than 1500 mL) pushes the mediastinum across; rarely an effusion is large enough to mimic tamponade physiology.

Pneumothorax is the commonest procedural complication; NHLBI teaches that severe chest pain or trouble breathing can signal a tension pneumothorax and shock.

Re-expansion pulmonary edema — frequently in the first hour, usually within 24 hours; potentially lethal if untreated.

Needs antibiotics plus drainage; mortality from parapneumonic effusion is still around 10%, higher when drainage is delayed. Report persistent fever on antibiotics in a patient with an effusion.

Prevented by limiting each session to about 1500 mL and avoiding negative intrapleural pressures; presents as cough, dyspnea, pink frothy sputum and cyanosis in severe cases, and is potentially lethal in 20% if untreated. Report immediately. Care is supportive (oxygen for hypoxia, ventilation if severe); StatPearls notes "The use of diuretics is contraindicated due to their tendency to worsen a fluid-depleted state."

Sudden dyspnea or sharp chest pain after the tap needs immediate assessment and a chest X-ray; a large, progressive or symptomatic pneumothorax may need a chest tube.

Bloody fluid on a tap is reportable information; an undrained hemothorax can also become an empyema.

CDC’s emergency warning signs: "People experiencing these warning signs should obtain medical care right away."

CDC’s pediatric emergency warning signs — obtain care right away.

A CDC warning sign in adults and children alike — the pattern of a secondary complication such as bacterial pneumonia arriving on the stripped airway.

Influenza can decompensate heart failure and trigger MI, stroke, DKA, COPD and asthma exacerbations. CDC lists "Worsening of chronic medical conditions" among the emergency warning signs.

Both can lead to acute lung injury, respiratory failure, ARDS, sepsis, septic shock and multi-organ failure. Preventing and treating secondary bacterial pneumonia "also is critical for severely ill patients." Watch for the improve-then-worsen pattern.

Severe complications can develop within 48 hours of symptom onset: tachycardia, hypotension and escalating oxygen needs are emergency cues.

Severe muscle pain (a child refusing to walk), confusion or seizures are warning signs.

Nine out of ten people hospitalized with flu in recent seasons had at least one underlying condition.

Low output from right-ventricular failure; syncope is highly predictive of PH and a fast-track warning sign.

NHLBI: seek emergency care — it may be a heart attack or a pulmonary embolism.

Rebound pulmonary hypertension from a drug with a 3–5 minute half-life.

Rapidly evolving right-ventricular failure, syncope, low-output signs, hemodynamic decompensation and poorly tolerated arrhythmias are warning signs for fast-track referral to a PH center.

The FDA label: "Avoid abrupt withdrawal." Treat any interruption as an emergency and report at once.

Sleep apnea puts patients "at increased risk of complications associated with PCA administration, such as decreased level of consciousness, respiratory distress, and hypotension," and complications are most likely when an infusion is first started. "Mechanical ventilation should be considered if signs of clinical deterioration are evident."

"Continuous pulse oximetry, end tidal carbon dioxide monitoring, and frequent vital signs monitoring may be required with initiation and ongoing use of a PCA pump," and "nurses must be especially vigilant when first initiating PCA infusion." Before surgery, the patient should "tell your healthcare provider that you have sleep apnea."

Blood fills the airways: "a patient presenting with distress, tachypnea, and hypoxia alongside significant hemoptysis should prompt immediate resuscitation efforts." Massive hemoptysis "is a life-threatening condition that requires immediate and effective assessment and management."

NCI: "Unless there is airway obstruction or cerebral edema, treatment may be delayed until after an assessment" — so airway obstruction or cerebral edema makes it an emergency.

"Symptomatic severe hypercalcemia due to malignancy is associated with a poor prognosis and requires urgent treatment."

With a known or one-sided source, "place the affected side down to isolate bleeding and spare the remaining lung." Labs include type and crossmatch, blood gas and coagulation panel; bronchial artery embolization succeeds in up to 90%, but rebleeding "occurs in approximately 30% of patients within 30 days."

Loss of each cell line can show as "fatigue and shortness of breath, opportunistic infections, and easy bleeding or a vasculitic rash."

After chest-tube removal, watch for "respiratory distress, decreased breath sounds, or hemodynamic instability."

CDC emergency warning signs: "call 911 or call ahead to your local emergency facility. Notify the operator that you are seeking care for someone who has or may have COVID-19."

"Prior to prescribing PAXLOVID: 1) Review all medications taken by the patient to assess potential drug-drug interactions with a strong CYP3A inhibitor like PAXLOVID and 2) Determine if concomitant medications require a dose adjustment, interruption, and/or additional monitoring." IDSA (approach section, 9/23/2026): "Patients’ medications should be screened for serious drug interactions."

Anaphylaxis during or after the infusion is an emergency (see Anaphylaxis).

Possible acute exacerbation — "Exacerbations from IPF can be life threatening" (NHLBI); in-hospital mortality exceeds 50% (StatPearls).

NHLBI: "Your doctor may treat exacerbations with medicines, such as glucocorticoids, or increased levels of supplemental oxygen." StatPearls: high-dose corticosteroids, "but immunosuppression in the context of pneumonia can be fatal."

Both labels require liver tests before starting.

NHLBI: "Call 9-1-1 for help if you suddenly have trouble breathing or talking, you feel confused, or your family or caregivers notice a bluish color on your skin or lips. These are signs of respiratory failure."

NHLBI: "Also call 9-1-1 or go to the hospital if you start coughing up a lot of blood." "Coughing or spitting up blood may be a sign that an artery has broken and is bleeding into the airway."

"TRIKAFTA should not be used in patients with severe hepatic impairment (Child-Pugh Class C)." Also watch for hypersensitivity: "Hypersensitivity reactions, including cases of angioedema and anaphylaxis, have been reported in the postmarketing setting."

StatPearls: "Lung transplant is the treatment of choice for end-stage lung disease." "Notably, transplantation is not a cure for cystic fibrosis." "Invasive mechanical ventilation is an option, and although it has been associated with increased mortality, recent studies showed that it can serve as a bridge for transplant with decreased mortality over time."

One-sided cortical territory losing perfusion — face drooping on one side when smiling, an arm that drifts when raised, speech slurred or strange. The T is Time: call 911 right away — the most-used prehospital recognition screen.

FAST was built for anterior-circulation stroke and can miss over 70% of posterior-circulation strokes, which present with balance and vision deficits — adding Balance and Eyes catches them.

The hemorrhagic flags: the hematoma is a mass — raising ICP as it compresses tissue — with DBP often > 110 and rapidly developing signs. SAH classically announces itself with a thunderclap headache, syncope, photophobia, and nuchal rigidity; a pontine bleed causes coma and quadriparesis.

Transient ischemia without tissue injury — but indistinguishable from a stroke at onset, and the herald of one: stroke risk peaks in the next 48 hours. Same 911 response, every time.

This is why serial neuro checks continue for days after the deficit stabilizes: falling level of consciousness is the alarm. For malignant cerebellar edema, ventriculostomy for obstructive hydrocephalus and decompressive suboccipital craniectomy are strongly recommended — the nurse’s job is to catch the decline early enough for surgery to matter.

The first-hours playbook: serial neuro checks, acute SBP lowering toward 140 mm Hg for presenting SBP 150–220 (AHA/ASA, per StatPearls), reversal of any anticoagulant, and head of bed at 30°. A CTA spot sign means the bleeding has not stopped.

A TIA that is worked up and treated urgently cuts recurrence risk by at least 80% — reassurance and outpatient follow-up "next week" is the error. ABCD2 ≥ 4 warrants admission.

The trend is the alarm, not the absolute number: a ≥ 2-point decline is clinically significant, an impending-herniation red flag, and must be reported to the provider.

Uncal herniation: the medial temporal lobe compresses the ipsilateral oculomotor nerve (CN III) against the tentorial edge — typically with contralateral hemiparesis. Herniation in progress.

The late sign — sympathetic surge forcing perfusion across the pressure, reflex bradycardia answering it, brainstem compression breaking the breathing. Brainstem herniation is imminent — act immediately.

Injury above the red nucleus (hemispheres / corticospinal tract); scores motor 3 on the GCS. A late sign of severe brain damage.

Brainstem injury at or below the red nucleus; scores motor 2 and carries the worse prognosis (≈ 10% survival vs 37% for decorticate). Progression from decorticate to decerebrate means the injury is descending toward the brainstem — report immediately.

The epidural hematoma’s signature: transient recovery while the arterial bleed expands, then rapid deterioration. Seen in ~14–21% of EDH and not pathognomonic — but deterioration after a lucid spell is a surgical emergency.

Memorize the red-flag list and escalate on any one: new dilated/nonreactive or asymmetric pupils · GCS decline > 2 points · new or decerebrate posturing · Cushing’s reflex · irregular respirations or apnea · sustained ICP elevation despite treatment · sudden deterioration during handling · seizures with altered consciousness.

The nurse’s serial checks ARE the treatment window. A lucid patient who begins to slip gets a stat provider call and prep for emergent craniotomy — not another hour of observation.

Defend the numbers: SpO₂ > 90%, PaO₂ > 60 mmHg, SBP ≥ 100 (ages 50–69) or ≥ 110 mmHg (15–49 and > 70). And investigate hypotension elsewhere — isolated head trauma usually does not cause it.

This is the operational definition of status epilepticus — past t1 the seizure is unlikely to stop on its own. Call for emergency help now; every minute of delay makes benzodiazepines less effective.

Think nonconvulsive status epilepticus — ongoing electrographic seizure without convulsion. Only an EEG can make the diagnosis; escalate rather than waiting for the patient to “wake up.”

Past t1 = 5 minutes the seizure is unlikely to stop on its own; past t2 = 30 minutes neuronal death and lasting network injury begin. First-episode convulsive status carries ≈ 16–20% mortality — roughly 40% or higher when refractory. The nurse’s move: time every seizure from onset, call for emergency help at 5 minutes (or per policy sooner), and anticipate the benzodiazepine pathway — underdosed or delayed benzodiazepines are a frequent, avoidable cause of treatment failure.

This is why the response is airway-first: side-lying position so secretions drain, oxygen and suction ready at the bedside, and monitoring for apneic periods during and immediately after a generalized seizure.

Suspect it whenever altered consciousness persists unexplained — including the patient who “just isn’t waking up” after a convulsion stops. EEG is required for the diagnosis; escalate for a stat EEG rather than observing.

Meningococcal endothelial destruction — capillary hemorrhage plus microthrombi. Press a glass against it: a rash that does not fade is vessel damage, not irritation (harder to see on brown or black skin). Purpura and shock can follow within hours — and its absence excludes nothing.

The earliest herald of rising intracranial pressure from diffuse cerebral edema — report immediately, every time.

Cortical involvement — from raised ICP and inflammation in meningitis, or direct parenchymal infection in encephalitis (54% of HSV encephalitis per StatPearls; 28% of neonatal cases present this way).

Localized cortical injury or pressure on the optic discs — both signal rising ICP, both are report-immediately findings, and both trigger the CT-before-LP rule.

Meningococcal sepsis shutting down peripheral perfusion — circulatory collapse can develop within hours of the first symptoms.

Infants rarely show the classic signs — neck stiffness appears in only ~3% of neonatal cases, a bulging fontanelle in ~22% (StatPearls). Fever or hypothermia, lethargy, irritability, feeding intolerance, and an unusual high-pitched cry are the real presentation.

Abnormal tone in a febrile (or hypothermic) infant is an emergency cue in its own right; a baby need not have every listed sign for the family to seek immediate help.

Parenchymal (encephalitic) dysfunction — HSV-1 targeting the temporal lobes and limbic system. This picture triggers empiric IV acyclovir without waiting for confirmation: a delay beyond 48 hours worsens outcomes.

The heralds are deteriorating LOC and papilledema. The nurse’s counters: head of bed at 30°, serial neuro checks, and immediate escalation — anticipate osmotic therapy (mannitol or hypertonic saline) and, in the intubated patient, mild hyperventilation.

Spreading purpura with cold extremities is a now-emergency: anticipate aggressive 0.9% NaCl resuscitation (20 mL/kg over 5–10 min) with inotropic support; refractory shock may need stress-dose hydrocortisone (impaired adrenal response) in children.

Any seizure is a report-now event and a marker of cortical involvement. In neonates, watch too for ventriculitis, hydrocephalus, and abscess — convulsions and hydrocephalus together complicate ~26% of cases.

Neurogenic shock: lost sympathetic tone vasodilates the capacitance vessels (dropping venous return) while unopposed vagal tone slows the heart. Contrast hypovolemia: hypotension with tachycardia and cool, pale skin.

The phrenic nerve (C3–C5) drives the diaphragm; injury at or above C5 can weaken or eliminate it. Early-intubation indications: level above C5, total paralysis, low lung volumes, concomitant chest injuries.

Autonomic dysreflexia: unopposed sympathetic discharge below the lesion drives severe hypertension; the brain’s corrective signals can’t cross, so vagal effects (flushing, sweating, bradycardia) appear only above the level.

The rest of the AD picture — baroreceptor-driven vagal outflow above the lesion against ongoing vasoconstriction below it.

The response is a fixed sequence: 1) sit the patient upright, legs dangling, and loosen everything tight (clothing, shoes, belts, binders); 2) bladder first — the trigger in ~85% of cases (kinked or clogged catheter, distention); 3) bowel — check for impaction, lidocaine gel before the digital exam; BP every 5 minutes throughout; 4) if SBP stays > 150 mm Hg, rapid-onset/short-duration antihypertensive — most easily 1 to 2 inches of 2% nitroglycerin paste on the skin above the injury level, or nifedipine 10 mg bite-and-swallow. Escalate/call 911 if the cause can’t be found or the BP won’t come down.

Serial respiratory assessment is the watch: know the early-intubation indications (injury above C5, total paralysis, low lung volumes, chest injuries) and expect tracheostomy if ventilation runs past 2 weeks. Report fever and chills, cough, chest tightness, or shortness of breath — and screen for obstructive sleep apnea (loud snoring, waking choking or gasping, unrefreshing sleep).

Sudden loss of dopaminergic tone precipitates parkinsonism-hyperpyrexia syndrome, a neuroleptic-malignant-like state with tachycardia, labile BP, diaphoresis, a profound CK rise, and leukocytosis. This is a rapid-response emergency: the dopaminergic drug goes back in, cooling and fluids start, and the patient goes to the ICU.

A neuroleptic-malignant-like syndrome from abrupt loss of dopaminergic tone; levodopa and amantadine are the named triggers. CK "can be profound" and WBC runs 10,000–40,000. The treatment is the opposite of the reflex: restart the dopaminergic drug, cool aggressively, correct volume, ICU support, ± bromocriptine or dantrolene. Never stop these drugs abruptly — "stopping it suddenly can have potentially serious side effects." Mortality is now below 10% — with recognition.

The defining feature of delirium: network function waxes and wanes as the inflammatory and neurotransmitter insult fluctuates. A new or rapid change in mental status is reported immediately — delirium "requires urgent evaluation," and nurses are often the first to detect it.

Attention is the core deficit of delirium and the thing that separates it from dementia, where attention is relatively preserved early. Disorganized thinking, hallucinations or difficulty maintaining consciousness are delirium signs unless proven otherwise.

Decreased arousal from the same network failure. It is the most commonly missed form (in one study only 21% of nursing staff recognized it) and carries the highest morbidity and mortality — quiet is not the same as fine.

Dopamine excess and cholinergic depletion drive arousal and perceptual disturbance; easier to detect because the patient is agitated. In the ICU the mixed form, fluctuating between the two, is the most frequent.

Each infarct removes another block of function; deficits emerge within 6 months of a stroke. A sudden new focal deficit is a stroke work-up, not a dementia note.

Delirium can be "only partially reversible, persistent, or even irreversible," is an independent risk factor for later dementia, and accelerates decline in AD — with baseline dementia predicting persistence for more than 5 years. Patient framing: when the cause is treated, recovery often follows, but it can take weeks or sometimes months. Every hour of unrecognized delirium is time the cause goes untreated — a new acute confusion is an emergency-level work-up.

Coughing or choking at meals, wet voice, new dyspnea or fever after eating are report-now findings. The intervention is assisted hand feeding — upright, distraction-free, small pieces, thickened liquids as needed — not a feeding tube: AGS Choosing Wisely states tubes do not reduce aspiration pneumonia or improve nutrition and increase agitation, restraint use and pressure ulcers.

Search the immediate area, then call 911 if the person is not found within 15 minutes, telling responders about the dementia. Prevention: door and window alarms, deadbolts out of sight-line, hidden keys and coats, night lights, structured daytime activity, an ID bracelet and enrollment in a wandering response service such as MedicAlert’s Safe & Found. A person living with dementia is never left unsupervised in new or changed surroundings.

These are red flags against MS. MS symptoms build over days to weeks; a deficit that arrives in minutes points to a vascular event and is worked up as a stroke, not a relapse.

A JC-virus infection of the brain that is progressive and fatal, classically on natalizumab — risk stratified by anti-JCV antibody status, treatment beyond 2 years, and prior immunosuppression (0.09 vs 11.1 cases per 1,000), dispensed only through the TOUCH program — and watched for on ocrelizumab and other immunosuppressive DMTs. Management is stopping the drug and plasma exchange. A new progressive deficit on a DMT is not assumed to be a relapse.

Baclofen is a GABA-B agonist; remove it suddenly and the spinal reflexes it was suppressing fire unopposed. Drug holidays happen only in hospital with a 2–4 week taper; pump patients keep every refill appointment and monitor the pump. Tizanidine has its own rebound — tachycardia, hypertension, and increased spasticity — and is also tapered.

The diaphragm and intercostals have failed and the neck muscles are recruited to breathe — myasthenic crisis may be close. This is a respiratory emergency: "early intubation is needed for most patients," and elective intubation is favored over crash intubation.

MG itself spares the autonomic system, so muscarinic signs in a weak myasthenic point to cholinergic excess from the anticholinesterase, not to MG. Hold the drug, protect the airway, notify — atropine treats the muscarinic signs but not the weakness.

Affects 15–20% of patients at least once; most need early intubation, favoring elective over emergent. Mortality is now about 4.5%. Act on the bedside trend, not the gas — the neuromuscular criteria put vital capacity < 20 mL/kg and inspiratory force weaker than −30 cmH₂O in intubation range. Management: airway, hold or sharply reduce the anticholinesterase (ChEIs "increase airway secretions, which may exacerbate breathing difficulties"), PLEX or IVIG, treat the trigger, and aggressive chest physiotherapy and suctioning to prevent atelectasis.

Rare — "cholinergic crises are now rare" — but life-threatening: death comes from progressive respiratory failure. The textbook contrast (myasthenic = tachycardia, pale cool skin, no GI change; cholinergic = bradycardia, red warm skin, diarrhea, secretions) is a recognition aid, not the decision point: professional guidance treats both the same — airway first, hold the drug, PLEX/IVIG — and adds atropine 2 mg IV, repeated to atropinization, for the muscarinic signs. Atropine does nothing for the weakness, so ventilatory support still stands.

Demyelination or axonal injury of motor nerves and roots produces flaccid weakness that ascends over hours to days, and some courses are fulminant. Progressive weakness is an emergency, because the next muscles in line are the neck flexors and the diaphragm.

Oropharyngeal cranial nerves fail after the facial nerve. Bulbar weakness means aspiration and airway risk and is an ICU-admission criterion: hold oral intake, notify, anticipate speech-language evaluation and a feeding tube.

The neck flexors share innervation levels with the diaphragm, so neck-flexor weakness is the strongest bedside predictor of mechanical ventilation. Severe or rapidly worsening weakness of the neck and hip flexors is an ICU criterion.

The failing diaphragm and intercostals recruit accessory muscles and shorten each breath; the single-breath count is a bedside vital capacity. A count of ≤ 19 predicts a need for ventilation. Call the provider or rapid response — do not wait for the saturation to fall.

Autonomic fibers are peripheral nerves; about two-thirds of patients develop dysautonomia, and it worsens as respiratory failure deepens. Cardiac arrhythmias are part of why GBS carries significant mortality — severe bradycardia can put the patient at risk of asystole and may need a pacemaker — so heart rate and blood pressure are monitored continuously.

Rapid response and ICU: 84% of those who need ventilation need it within 7 days of admission. The goal is elective intubation on trend (VC < 15 mL/kg, or 20/30/40 plus clinical signs) — an emergency airway in a dysautonomic patient risks labile pressure, arrhythmia, and hyperkalemia with succinylcholine. Noninvasive ventilation is not recommended: these patients need full support for days and their dysautonomia worsens as failure deepens. Many of the intubated go on to tracheostomy.

About two-thirds of patients, and every ventilated patient in one series. Heart rate and blood pressure are monitored continuously, and severe autonomic cardiovascular dysfunction — arrhythmias or marked variation in blood pressure — is an ICU criterion. Treat paroxysmal hypertension only with short-acting, quickly titratable agents to avoid rebound hypotension, and expect plasma exchange to be withheld when the hemodynamics are unstable.

The improvement curve lulls everyone. Monitoring for arrhythmia, pressure swings and secretion retention is especially important in patients who have recently left the ICU and in those with cardiovascular risk factors — the step-down unit inherits the ICU’s vigilance, not its relief.

May signal an uncommon migraine type (e.g., hemiplegic) — or a stroke; treat new weakness, speech change or decreased consciousness as an emergency.

Thunderclap headache: subarachnoid hemorrhage until proven otherwise.

NINDS red flags for a secondary cause such as stroke; seek care right away.

Possible meningitis or intracranial injury — NINDS says get care as soon as possible.

NINDS and SNOOP red flags for a secondary headache — NINDS says to "Call or see a doctor right away".

Emergency evaluation: noncontrast CT first, lumbar puncture after imaging if CT is negative and suspicion is high. Do not treat it as a bad migraine.

In patients under 45, patent foramen ovale, female sex and oral-contraceptive use are common risk factors — patients with aura should avoid oral contraceptives because of stroke risk.

May be stroke, not Bell’s palsy. NHS: "Call 999 if: somebody’s face droops on 1 side" … "These can be signs of a stroke". StatPearls: "stroke may actually account for more occurrences of acute facial paralysis overall."

Possible corneal abrasion from exposure. StatPearls: patients should "follow up immediately if eye pain, photophobia, or a foreign body sensation develops, which can indicate a corneal abrasion and necessitate ophthalmological evaluation."

Eye pain, light sensitivity or a foreign-body feeling needs immediate follow-up.

"HLA-B*1502 IS FOUND ALMOST EXCLUSIVELY IN PATIENTS WITH ANCESTRY ACROSS BROAD AREAS OF ASIA."

See the depression page for suicide-risk assessment.

Blood suddenly fills the subarachnoid space. NINDS: "If you experience a sudden, severe headache, especially with any other symptoms, call 911 and seek immediate medical attention."

Raised pressure and blood irritating the meninges — "As the blood moves further down the spinal cord, it irritates surrounding nerves causing neck pain and stiffness."

NINDS lists "A brief or prolonged loss of consciousness" and "Cardiac arrest (the heart stops beating)" with rupture. "Seizures occur in less than 10% of patients, while sudden death develops in 10% to 15%."

A small warning leak — "But only a small number of people have a sentinel headache before a rupture."

"A development of neurologic deficits should be evaluated with an urgent head CT scan (to identify rebleeding, cerebral infarction, hydrocephalus), angiography (to identify symptomatic vasospasm), and/or EEG (to detect subclinical seizures)."

Severe hyponatremia — "in severe cases, seizures or coma."

Risk factors: "elevated systolic blood pressure, poor Hunt-Hess grades, intracerebral or intraventricular hematomas, aneurysms > 10 mm in size, and aneurysms in the posterior circulation." Keep BP within ordered limits; StatPearls describes stopping antithrombotics and reversing anticoagulation until repair.

Report any neurologic decline for urgent CT. Magnesium, statins and clazosentan have not proven beneficial; oral nimodipine is standard.

Treated with an external ventricular drain and, later, a shunt if needed.

Hypoglycemia unawareness — "You will need help right away to deal with severe hypoglycemia."

"The most common sign and symptoms are fever, headache, seizures, and altered mental status." Anyone suspected of encephalitis "should immediately contact a doctor or go to the hospital."

Temporal- and frontal-lobe inflammation — "psychiatric features, memory deficits, and aphasia." Often "misdiagnosed as psychiatric disorders." Altered mentation lasting more than 24 hours with fever or focal signs is typical.

Inflamed cortex; "the medial temporal and hippocampal regions affected by herpes simplex encephalitis are highly epileptogenic." Status epilepticus is a short-term complication.

Localized brain injury; papilledema signals raised pressure — "Lumbar puncture is contraindicated in the presence of brain shift, herniation, or any other signs of increased intracranial pressure."

NINDS: "Encephalitis can be dangerous in infants." Newborn HSV encephalitis usually appears in the first weeks of life — lethargy, irritability, tremors, seizures, poor feeding.

Acute flaccid myelitis "can cause limb weakness, paralysis, areflexia, cranial neuropathies, and neuromuscular respiratory failure."

"The rapid onset of symptoms contrasts with the slower progression typically observed in primary psychiatric disorders." Then "Significant autonomic dysfunction, including labile blood pressure and heart rate, cardiac arrhythmias, temperature instability, and central hypoventilation" — watch vital signs and breathing closely.

ICU care for "frequent neurologic checks, airway monitoring, hemodynamic instability, and blood pressure titration."

"As cerebral edema may be a life-threatening condition, aggressive treatment is necessary." Brain herniation and "acute, obstructive hydrocephalus" are listed complications. Full ICP assessment is on the increased-icp page.

Declining consciousness, worsening headache with vomiting or a new deficit needs immediate escalation; see the increased-icp page for the full assessment.

VMAT2 labels: "Patients with HD who express suicidal ideation should be evaluated immediately." About 25% of patients attempt suicide, and suicide is the second cause of death (StatPearls). EHDN: suicide risk should be assessed "irrespective of the stage."

EHDN: dysphagia can cause "repeated choking" and "even cardiac arrest." Chorea at mealtimes needs protective measures "to avoid traumatic injury or chokes."

"Close observation of patients for the emergence or worsening of depression, suicidality, or unusual changes in behavior should accompany therapy." "Patients, their caregivers, and families should be informed of the risk of depression and suicidality and should be instructed to report behaviors of concern promptly to the treating physician" (XENAZINE). XENAZINE and AUSTEDO are contraindicated in patients who are actively suicidal or have untreated or inadequately treated depression.

Management begins with "immediate discontinuation of XENAZINE." INGREZZA: "Advise patients to contact a healthcare provider or report to the emergency room if they experience signs or symptoms of NMS."

AUSTEDO and INGREZZA: "Inform patients to consult their physician immediately if they feel faint, lose consciousness, or have heart palpitations."

StatPearls: acute hydrocephalus "is a life-threatening condition" with herniation, and "It requires immediate neurosurgical intervention to relieve the pressure." "Acute hydrocephalus is a medical emergency."

NINDS: "People should seek medical help immediately if symptoms develop that suggest the shunt system is not working properly." FDA: "medical attention should be sought immediately." Malfunction lets CSF build up again, which "can increase the intracranial pressure resulting in cerebral edema and ultimately herniation" (StatPearls).

Watch for a falling level of consciousness, a dilated nonreactive pupil, autonomic dysfunction and loss of brainstem reflexes. "It requires immediate neurosurgical intervention to relieve the pressure."

Catheters can calcify, break or disconnect, and valves can stick (FDA). "The complications usually cluster in the first postoperative year and then decline" (StatPearls, iNPH).

StatPearls: infection is usually from skin flora, "usually from Staphylococcus epidermidis," and "The abdomen has to be monitored for peritonitis secondary to shunt infection." Some patients need antibiotic prophylaxis before dental or invasive procedures.

"No single intervention successfully prevents infection; however, limiting the duration of ventricular catheterization is the most effective." Obstruction "by air, blood, and debris is common, leading to false ICP recordings" (StatPearls).

Never an “expected finding to monitor” — thoughts of self-harm require getting help right away: call or text 988 (Suicide & Crisis Lifeline), or 911 in an emergency, and do not leave the person alone.

Warning signs of suicide — along with withdrawing from friends, making a plan or researching ways to die, preparatory behaviors such as acquiring a firearm, talking about being a burden, extreme mood swings, and dangerous risk-taking.

Marked mood changes are among the warning signs of more imminent risk, and a behavior change counts most when it is new. Behavior signs outrank verbal denial — many people who die by suicide deny suicidal thoughts during clinical encounters.

About 5–10% of MDD declares itself as bipolar disorder; antidepressant-induced activation or mania is a report-immediately finding, especially after a medication start or dose change.

Behavior signs outrank verbal denial — many people who die by suicide deny suicidal thoughts during clinical encounters. The nurse’s moves: do not leave the person alone, secure or remove medications, firearms, and alcohol, connect to 988/911, and escalate for possible hospitalization when risk is imminent.

Report increased activity and talkativeness immediately, especially after a medication start or dose change — the drug that helps unipolar depression can unmask bipolar disorder.

The SHIVERS cue set: Shivering, Hyperreflexia, Increased temperature, Vital-sign abnormalities, Encephalopathy, Restlessness, Sweating. Management: stop the serotonergic agents, supportive care, benzodiazepines. Switching to or from an MAOI needs a ≥ 14-day washout.

The lowered seizure threshold gives way. A seizure can come early — "within just a few hours of alcohol cessation" — and kindling raises the seizure risk with every successive withdrawal.

The herald of delirium tremens: altered mental status on top of autonomic signs is delirium, not hallucinosis. This is the moment to escalate, not observe.

Delirium tremens in full: severe autonomic hyperactivity plus fluctuating delirium and hallucinations — mortality ~1–5% even with treatment.

The Wernicke encephalopathy triad from thiamine deficiency — but only ~16% of patients show all three, so any one of them in a drinker demands thiamine now.

Consider another cause if the seizure is focal, if there is trauma or fever, or if the last drink was more than 48 hours earlier; a seizure with a likely alternative cause warrants further evaluation such as EEG or imaging. After a withdrawal seizure, another can follow: these seizures usually come singly or in brief clusters, and in a trial of adults with a witnessed withdrawal seizure, placebo carried a much higher risk of a recurrent seizure within six hours than a single IV lorazepam dose — benzodiazepines reduce recurrence. Phenytoin "has not been shown to be effective or safe in preventing recurrent alcohol withdrawal seizures."

Heralded by new confusion or disorientation on top of autonomic signs. The nurse’s move: escalate now — severe withdrawal is treated in a monitored setting, with adequate IV access for medication, fluids and electrolytes, and aggressive benzodiazepine dosing with sedation, respiratory rate and oxygen saturation checked around each dose.

Untreated Wernicke progresses to Korsakoff syndrome in ~80% of survivors — a chronic, largely irreversible amnestic disorder with confabulation. Prevention is cheap and yours to guard: IV/IM thiamine (oral absorption is unreliable), and never dextrose without thiamine in this population.

The emergency subtype. Assess with the sourced wording: "Are you hearing a voice that is telling you to do something?" followed by "Do you believe what you hear is real?" — if the answer is yes, the client is at increased risk for acting on the command. Patients with command hallucinations require close monitoring for suicide, homicide and other violence risk.

Assessed at every contact. Suicide is the most common cause of premature death in schizophrenia, lifetime risk is 5% to 10%, and two-thirds of patients report at least one episode of suicidal ideation. Two amplifiers are specific to this disorder rather than to depression: command hallucinations and akathisia, whose severity is linked to suicidal ideation, aggression and violence.

Acute dystonia occurs within 48 hours of drug exposure in 50% of cases and within 5 days in 90%, as involuntary muscle contractions producing abnormal posturing: oculogyric crisis, torticollis, trismus, opisthotonus. The priority is the airway — evaluate for acute laryngeal dystonia, "which can result in life-threatening airway obstruction with difficulty breathing, swallowing, and speaking," and which may require intubation. Young men are more likely to have dystonic reactions.

A life-threatening reaction to a dopamine-receptor antagonist or to rapid withdrawal of a dopaminergic drug, developing over 24 to 72 hours and driven by a sudden fall in central dopaminergic activity. The DSM-5 major criteria, as relayed by StatPearls, are all three of exposure to a dopamine-blocking agent, severe muscle rigidity, and fever; at least two other criteria are needed from diaphoresis, dysphagia, tremor, incontinence, altered consciousness, mutism, tachycardia, labile blood pressure, leukocytosis and elevated creatine kinase. The main risk factor is starting or increasing the dose, and prior NMS carries up to a 40% recurrence rate.

Two risk amplifiers belong to this disorder specifically rather than to depression: command hallucinations, where believing the voice is real raises the risk of acting on it, and akathisia, whose severity is linked to suicidal ideation, aggression and violence. Clozapine carries an FDA indication for "Reducing the risk of recurrent suicidal behavior in patients with schizophrenia or schizoaffective disorder" — which is a reason to push toward it rather than around it. The generic assessment sequence and safety planning are owned by the Depression page; what this page adds is the two disorder-specific amplifiers.

Discontinuing the offending agent is paramount, followed by aggressive cooling, volume and electrolyte correction, and ICU-level monitoring — patients are prone to cardiac dysrhythmias and respiratory failure from chest-wall rigidity. Bromocriptine and dantrolene are the pharmacologic rescues in severe cases, with benzodiazepines for agitation and ECT if refractory. With early recognition most patients fully recover in 2 to 14 days. Re-initiation waits at least two weeks after resolution, uses lower-potency agents at low doses, avoids lithium alongside the neuroleptic, and teaches the patient to avoid dehydration.

Many patients "engage in property damage or even harm themselves or others through verbal or physical assaults. They may also become highly aggressive, agitated, or irritable." The criteria account for this: if the mood is irritable rather than elevated, four symptoms are required instead of three. Mania is a medical emergency and often requires psychiatric hospitalization.

"People experiencing a manic episode may become physically exhausted," and "the client may not eat or sleep for days at a time with potential physiological consequences." This is why the acute nursing goals are stable cardiac status, good hydration, sufficient sleep and rest, and intact tissue integrity, and why the laboratory follow-up includes sodium, hematocrit, albumin and prealbumin — nutrition labs that become abnormal because of the mania itself.

StatPearls: "Mania also commonly presents with psychotic features, which include delusions or hallucinations," and psychotic symptoms during severe mania or depression can result in "an incorrect diagnosis of schizophrenia." The discriminator is timing: if psychosis occurs only during mood episodes, the diagnosis is the mood disorder. Note that psychosis in an episode means it is mania, not hypomania, by definition.

"Bipolar depression accounts for the majority of the symptomatic burden and is associated with the highest risk of suicide in bipolar disorder," and "most suicide attempts and completed suicides occur during depressive or mixed episodes rather than during manic episodes." The magnitude: lifetime suicide attempt rates are estimated at 25% to 50%, and the mortality ratio from suicide is 20 times above the general population rate, exceeding other mental health disorders.

The toxicity ladder. Gastrointestinal symptoms come first in acute toxicity; the neurologic system is the most commonly affected, especially in chronic toxicity — drowsiness, coarse tremor, slurred speech, hyperreflexia, agitation, muscle weakness, nystagmus and ataxia, progressing to mental status change, seizures, delirium and coma. The rule: vomiting, confusion or cerebellar signs in anyone with access to lithium is toxicity until proven otherwise.

The nursing version of the same ladder: early toxicity is "diarrhea, vomiting, drowsiness, muscular weakness, and lack of coordination," and "at higher levels giddiness, ataxia, blurred vision, tinnitus, and a large output of dilute urine may be seen." These are on the report-immediately list patients are given at discharge.

There is no antidote. Mild toxicity may need only discontinuation; moderate toxicity needs supportive care and intravenous isotonic fluid to promote renal clearance, watching volume status and sodium to avoid hypernatremia. Lithium does not bind to activated charcoal. Dialysis is recommended when renal function is impaired with a level above 4.0 mmol/L, or when decreased consciousness, seizures or life-threatening dysrhythmias are present regardless of the level; it is suggested above 5.0 mmol/L, with significant confusion, or when the expected time to fall below 1.0 mmol/L exceeds 36 hours. Hemodialysis is preferred, and repeated sessions may be needed because of rebound after dialysis. Mortality is now under 1%, but SILENT — irreversible lithium-effectuated neurotoxicity — can leave permanent cerebellar dysfunction with ataxia, dysarthria and dysmetria even without toxic levels.

The phase is the cue: "most suicide attempts and completed suicides occur during depressive or mixed episodes rather than during manic episodes," which is why suicide assessment "should be performed at initial evaluation and repeated throughout treatment." Sourced risk factors include prior attempts, bipolar depression, mixed features, rapid cycling, substance use and anxiety disorders, psychotic symptoms, early onset and recent hospitalization, and comorbid metabolic syndrome and borderline personality disorder both carry increased suicidality. Lithium is the one mood stabiliser "consistently associated with reduced suicide mortality," which is a reason to persist with it. Assessment technique and safety planning belong to the Depression page.

Work it up. Do not attribute it. Panic patients have "much higher lifetime rates of cardiovascular, respiratory, gastrointestinal, and other medical problems compared to the general population," and "there is a high risk of coronary artery disease in patients with panic disorder, and the risk of sudden death is increased compared to the general population." The sourced differential includes angina, congestive heart failure, pulmonary embolism, asthma and mitral valve prolapse.

The thirteen sourced symptoms are palpitations or accelerated heart rate, sweating, trembling, shortness of breath or smothering, feelings of choking, chest pain, nausea or abdominal distress, dizziness or faintness, chills or heat sensations, paresthesias, derealization or depersonalization, fear of losing control, and fear of dying. The sources give no number beyond peaking within minutes — not ten minutes. A panic attack is not the same as panic disorder: attacks "can occur alongside other anxiety, mood, psychotic, and substance use disorder."

The arousal and reactivity cluster, which also needs at least two of six, adding concentration problems and sleep disturbance. On examination this shows as "increased heart rate, elevated blood pressure, muscle tension, and disrupted sleep patterns," and these findings appear or intensify "while discussing the trauma specifically or during flashbacks." Reckless or self-destructive behavior is a criterion symptom and should be assessed as such, not as a personality trait.

A panic-level behavior alongside running, shouting, screaming or withdrawal, in which "acute panic can lead to exhaustion." The sourced nursing response is physical rather than verbal: fluids to prevent dehydration, blankets for warmth, rest to prevent exhaustion — and "if a person continues to constantly move or pace despite interventions, high-calorie finger foods may be offered to maintain their nutrition."

A sourced culture-mediated presentation "that may be exhibited in Hispanic populations," described as distress "characterized by a general sense of being out of control." Suicidal gestures, seizures or fainting episodes may be observed, and it typically follows "a distressing event such as an interpersonal conflict or the death of a loved one." It is a presentation to recognise, not a symptom to correct.

Hospitalization is uncommon in anxiety disorders and suicidality is the reason it happens: "people with anxiety disorders rarely require hospitalization unless they are suicidal," and in panic disorder "because of the risk of suicide, some patients may need inpatient monitoring until the symptoms have subsided." Non-suicidal self-injury — "intentional self-inflicted destruction of body tissue without suicidal intention," a maladaptive coping strategy — is common among adolescents and young adults in psychiatric inpatient settings and is assessed separately. The full assessment sequence and safety planning belong to the Depression page.

The clinical consequence is a rule about attribution. Chest pain, palpitations and dyspnea are simultaneously the commonest panic symptoms and the presentation of angina, heart failure and pulmonary embolism — all three of which are on the sourced panic differential. A diagnosis of panic disorder in the chart raises the cardiac risk rather than lowering it, so new or changed chest pain gets a work-up, not a reassurance.

The sourced signs are "unconsciousness or inability to awaken"; "pinpoint pupils"; "slow, shallow breathing; breathing difficulty manifested by choking sounds or a gurgling/snoring noise from a person who cannot be awakened; or respiratory arrest"; and "fingernails or lips turning blue or purple." The pupil earns its place diagnostically: "the presence of miosis in a prehospital patient with altered mental status is highly indicative of responsiveness to naloxone."

Naloxone is indicated "specifically to reverse respiratory depression from opioid use," and should be given "to anyone suspected of an opioid overdose when there is evidence of significant respiratory depression or CNS depression." This is the finding that decides the drug, not the level of consciousness alone and not the story.

The stimulant (amphetamine) toxicity picture: tachycardia and hypertension, agitation severe enough to endanger staff and the patient, impulsivity and aggression, psychosis, seizures, hyperthermia, and weight loss, dehydration and insomnia; stimulant intoxication also dilates the pupils (StatPearls). The contrast an exam builds on: pupils DILATE with stimulants and CONSTRICT with opioids.

The sourced warning is explicit and is a staff-safety instruction as much as a clinical one: "it is important for nurses to be aware that individuals with acute stimulant intoxication may, without provocation, develop severe agitation with extreme violence and place themselves, family members, medical staff, and other clients at risk of major injury." Patients may be "highly agitated, even to the point of risking the safety of healthcare staff and themselves."

Generated by muscular activity, not a shifted hypothalamic set point — which is why antipyretics fail and why cooling has to be physical. The sourced urgency thresholds are a body temperature over 41 °C, and "external cooling therapies should be rapidly administered when patients present with temperatures exceeding 107 °F." Untreated it runs to rhabdomyolysis, arrhythmia and cardiovascular collapse.

On the sourced cocaine presentation list alongside epistaxis, headache, paranoia, neurological deficits, hyperthermia, vascular spasm with loss of distal pulses, extreme diaphoresis and excited delirium. The workup named is an electrocardiogram, chest x-ray and troponin "to assess the presence of coronary ischemia, including myocardial infarction and aortic dissection," plus head computed tomography for haemorrhagic stroke.

Read it through the vascular mechanism this page has already drawn, not as a gastrointestinal upset. Stimulants "cause NECROTIZING VASCULITIS of small- and medium-sized blood vessels, which can yield a myriad of END-ORGAN COMPLICATIONS (strokes and neurodegenerative diseases, coronary artery disease, ISCHEMIC BOWEL DISEASE)." The same process that causes the stroke and the myocardial infarction on this page can infarct gut, which is why new abdominal pain in this patient is not treated symptomatically and sent home.

The sourced escalation: initial "tremors, anxiety, restlessness, and general malaise, often resembling rebound anxiety," then "perceptual disturbances such as visual or auditory hallucinations, intense agitation, and depersonalization," sometimes psychosis with paranoid delusions. "Of particular concern is the risk of seizures, which may occur within one to five days of abrupt cessation or rapid tapering," with autonomic instability. GABAergic withdrawal is the dangerous kind, and the alcohol page documents the same picture.

The rare naloxone complication worth recognising: it "can precipitate noncardiogenic pulmonary edema," estimated at "between 0.2% and 3.6% of patients who have received naloxone and are transported to the emergency department," and "symptoms include persistent hypoxia despite the resolution of respiratory depression." A patient who is breathing adequately but still desaturating has a second problem.

Sourced as its own entity: acute inhalant intoxication "can cause life-threatening seizures and coma," and sniffing these products "can cause the heart to stop within minutes. This condition, known as sudden sniffing death, can happen to otherwise healthy young people the first time they use." Inhalant use "was highest among adolescents aged 12 to 17."

The population most exposed to this is the one least warned about it. About 10% of overdose deaths involved someone recently released from jail, prison, inpatient rehabilitation or a psychiatric hospital, and the sourced reason is that they "were unaware of decreased tolerance to the drug due to abstinence while in the institution." A medical-surgical admission for something unrelated does the same thing. Tolerance-loss teaching belongs in every discharge from every setting where a patient has been abstinent, not just from addiction services.

The patient-facing version matters as much as the clinical one: "it is essential to get the person to an emergency department… even if the person revives after the initial dose of naloxone and seems to feel better," and patients themselves "should be educated that once the pharmacological effects of naloxone have worn off, there is a possibility of respiratory depression." Overdoses involving potent or large quantities of opioids "may require additional doses of naloxone," and long-acting or potent opioids may need "additional intravenous bolus doses or an infusion." If repeated doses produce no response, "providers must consider other causes of unconsciousness."

Two mechanisms run in parallel. The acute one is muscular: hyperactivity generates heat and breaks down muscle, producing lactic acidosis, hyperthermia and collapse. The chronic one is vascular: necrotizing vasculitis of small- and medium-sized vessels producing "strokes and neurodegenerative diseases, coronary artery disease, ischemic bowel disease," plus corneal ulceration and vision loss on the cocaine list. There is no antidote — "treating amphetamine toxicity is supportive… treatment should focus on symptom and complication management."

The fatal endpoint of the purging chain and of refeeding: hypokalemia "can contribute to QTc prolongation," and low potassium with low magnesium "may equally contribute to torsades de pointes, a potentially fatal polymorphic ventricular tachycardia." "Early detection is critical to prevent sudden cardiac arrest."

Open RN lists "Seizures (purging via self-induced vomiting lowers seizure threshold)" — and bupropion is contraindicated in eating disorders because of an increased risk of seizures.

The single starred item on Open RN’s assessment table: "*Suicidal ideation may be present in severe cases or with coexisting depression." "Suicide is a leading cause of death for people diagnosed with anorexia nervosa," and "People with eating disorders are also at a higher risk for suicide." A safety plan is implemented immediately when risk is present.

Refeeding syndrome presents with "multisystem complaints ranging from nausea to hypotension," cardiovascular changes up to "cardiac arrest," "respiratory failure, pulmonary edema, and hypoventilation," and "rhabdomyolysis, myalgias, fatigue, muscle twitching, and diaphragm weakness." Nausea may be the first warning of hypotension.

"Suicide is a leading cause of death for people diagnosed with anorexia nervosa," and risk extends across the disorders — "People with eating disorders are also at a higher risk for suicide," and patients with bulimia "should be screened for suicidality and comorbid psychiatric illness." Safety receives top priority: "If the client is exhibiting risk for suicide, a safety plan should be immediately implemented." Males "are at a higher risk of dying because they are often diagnosed later than females."

Prevention is the treatment. A thorough nutritional assessment, then "the slow reintroduction of nutrients and fluids according to evidence-based guidelines." ASPEN, as summarized by StatPearls, starts with 100 to 150 g of dextrose or 10 to 20 kcal/kg in the first 24 hours, then increases "by 33% of their overall replenishment goal every 1 to 2 days"; gives 100 mg of thiamine before dextrose-based solutions; checks electrolytes every 12 hours for the first 3 days in high-risk patients; and considers holding feeding until severely low potassium, phosphate or magnesium are corrected. Monitoring includes "vitals every 4 hours for the first 24 hours" and "daily weights, inputs, and outputs." Nausea may be the first sign of hypotension.

Open RN: "Electrolyte disturbances (especially hypokalemia) are life-threatening and common with vomiting, laxative use, and restriction." Monitor "for bradycardia, hypotension, orthostatic changes, and arrhythmias." Low magnesium "can exacerbate hypokalemia and increase renal potassium wasting." For torsades, magnesium is the provider-level rescue — StatPearls describes 2 g IV as the recommended initial dose — so the nurse’s role is recognising the rhythm and escalating.

Hematemesis or severe chest pain after vomiting in a patient who purges is an emergency. Stimulant-laxative abuse causes a separate chronic problem, cathartic colon syndrome.

Phase 4 danger to self or others. "Assume that all violent clients are armed until proven otherwise, especially those presenting to an emergency department." If threatened with a weapon, "try to appear calm and comply with the individual’s demands," and "Do not attempt to reach for the weapon." If the situation is life-threatening in the community, call 911.

Project BETA’s medical red flags, via StatPearls: "any abnormal vital signs (blood pressure, pulse, oxygen saturation, or temperature), abnormal point-of-care glucose, any overt trauma, pupil asymmetry, slurred speech, incoordination, seizures, or hemiparesis," and symptoms including "new-onset psychosis." These call for immediate medical evaluation — especially in anyone over 40 with a new psychiatric picture.

"Delirium is characterized by rapidly fluctuating mental status with onset in hours to days, whereas dementia involves a gradual deterioration of cognitive function over months to years." "When delirium and ADRD are comorbid, priority should be given to managing the delirium."

"Risk of suicide is always a priority concern for people with mental health disorders in crisis. Any talk of suicide should always be taken seriously."

"An individual who is difficult to arouse or cannot be aroused (BARS 1) should be transferred to a medical emergency department." Benzodiazepines "may cause respiratory depression and excessive sedation, so close monitoring is essential after administration."

Never apply pressure to the chest or back: "If chest restraints are used, it is vital to ensure adequate chest expansion for ventilation. Never apply pressure to the client’s chest or back while they are immobilized due to asphyxiation risk." Protect the airway — "protecting the head and neck and maintaining airway patency." Staff training must include recognising distress such as positional asphyxia and monitoring "respiratory and circulatory status, skin integrity, vital signs." A death during restraint or seclusion, within 24 hours of removal, or within a week where restraint contributed, must be reported to CMS "no later than the close of business on the next business day" (deaths in soft, wrist-only restraints without seclusion are recorded in an internal log instead).

Olanzapine is not combined with a benzodiazepine — it "should not be used in patients who are severely intoxicated or taking benzodiazepines," and StatPearls, summarizing ACEP, cites "the risk of hypotension, bradycardia, and respiratory depression." Ketamine, used when first-line drugs fail, carries "increased risk for respiratory distress" and may require intubation.

StatPearls: "A significant association between OCD and suicidal tendencies has been confirmed." NIMH: "If you or someone you know is struggling or having thoughts of suicide, call or text the 988 Suicide and Crisis Lifeline at 988 or chat at 988lifeline.org"; "In life-threatening situations, call 911."

"Patients of all ages who are started on antidepressant therapy should be monitored appropriately and observed closely for clinical worsening, suicidality, or unusual changes in behavior." Thoughts of suicide → 988, or 911 "In life-threatening situations" (NIMH).

"Treatment with Anafranil and any concomitant serotonergic agents should be discontinued immediately if the above events occur and supportive symptomatic treatment should be initiated." MAOIs with clomipramine or within 14 days of stopping it are contraindicated "because of an increased risk of serotonin syndrome." StatPearls warns the fluoxetine–clomipramine combination can cause "seizures, cardiac arrhythmias, and serotonergic syndrome."

Label: "Prescriptions for Anafranil should be written for the smallest quantity of capsules consistent with good patient management, in order to reduce the risk of overdose." It is contraindicated "during the acute recovery period after a myocardial infarction."

NIMH: "Anyone thinking of harming themselves or attempting suicide needs help right away"; "If you or someone you know is struggling or having thoughts of suicide, call or text the 988 Suicide & Crisis Lifeline"; "In life-threatening situations, call 911."

Open RN: "If the client continues to escalate, measures must be taken to keep the client and others safe," and "If interventions are not effective in de-escalating a client at risk to themselves or others, seclusion or restraints may be required."

"Men with BPD may have greater functional impairment, impulsivity, and aggression than women with BPD and may be at higher risk of dying by suicide" (StatPearls). Thoughts of suicide → 988; "In life-threatening situations, call 911" (NIMH). "Suicidal behaviors tend to remit over time, although suicidality may continue when BPD symptoms are untreated or severe or when functional impairment persists" (StatPearls).

De-escalation first: "Speaking in a calm voice," "Offering options instead of trying to take control," "Providing space so the client doesn’t feel trapped." Seclusion or restraint only "If interventions are not effective in de-escalating a client at risk to themselves or others" (Open RN).

Label Medication Guide: "Call your healthcare provider or go to the nearest hospital emergency room right away if you or your child have any signs of heart problems, such as chest pain, shortness of breath, or fainting during treatment with CONCERTA."

"CONCERTA-treated patients who develop abnormally sustained or frequent and painful erections should seek immediate medical attention" (label).

NIMH: "If you or someone you know is struggling or having thoughts of suicide, call or text the 988 Suicide & Crisis Lifeline"; "In life-threatening situations, call 911."

"Avoid CONCERTA use in patients with known structural cardiac abnormalities, cardiomyopathy, serious cardiac arrhythmia, coronary artery disease, or other serious cardiac disease." Chest pain, shortness of breath or fainting → emergency room right away (label).

"If you or your child take too much CONCERTA, call your healthcare provider or Poison Help line at 1-800-222-1222 or go to the nearest hospital emergency room right away" (label).

"Advise patients to contact their healthcare provider or report to the emergency room if they experience signs or symptoms of serotonin syndrome" (VYVANSE label). Stimulants are also contraindicated with MAO inhibitors or within 14 days of stopping one, "because of the risk of a hypertensive crisis" (CONCERTA label); atomoxetine is likewise contraindicated when "Taking, or within 14 days of stopping, a monoamine oxidase inhibitor (MAOI)" (STRATTERA label).

Glucose below 70 mg/dL starves the brain and triggers a sympathetic surge. Below 54 mg/dL is level 2; a severe event needing another person’s assistance is level 3. Treat first, investigate second.

The seek-immediate-care cluster — this is DKA or HHS declaring itself, not routine hyperglycemia (see the dedicated DKA and HHS pages).

Conscious and able to swallow → the 15-15 rule: 15–20 g fast carbohydrate (glucose preferred — avoid fat or protein, which slow absorption), recheck in 15 minutes, repeat if still < 70. Cannot swallow or altered → IM glucagon or IV dextrose, never oral carbohydrate. Everyone on insulin or at high risk should have glucagon prescribed.

Any glucose > 600 mg/dL warrants immediate evaluation. The full recognition and management pictures live on the dedicated DKA and HHS pages — from this page, know which type each crisis belongs to and that polyuria, polydipsia, polyphagia, diaphoresis, and mental-status change are the seek-care-now cluster.

A report-and-act-immediately finding — severe DKA, or cerebral edema declaring itself.

Breathing difficulty beyond compensatory Kussmaul breathing is an emergency-care trigger, not something to watch.

Hypovolemia from combined GI and renal losses destabilizes the circulation — report immediately.

Warning signs during treatment: new headache, recurrent vomiting, altered mental status, urinary incontinence, Cushing triad (bradycardia, irregular respirations, hypertension). Treatment is mannitol 0.5–1 g/kg IV or 3% saline — and pediatric protocols omit the insulin bolus entirely because it is thought to raise this risk. (Honest footnote: the 2018 PECARN trial found no difference in neurological outcomes between faster and slower pediatric fluid replacement.)

The intravascular compartment is finally failing despite the hypertonic water shift — severe hypovolemia — "Tachycardia and hypotension correlate with severe hypovolaemia." This patient needs fluid resuscitation now.

Mentation deteriorates in step with osmolality — it "appears to correlate with the degree of hyperosmolality." Any depressed or deteriorating consciousness is a report-now finding.

Severe hyperosmolality can produce stroke-like focal signs — but remember the rule-out: poor mentation with osmolality < 320 demands a search for another cause.

Reported in up to 20% of patients (Endotext figure) as the osmolar insult to the brain deepens.

The end of the osmolality staircase — though the 2024 consensus dropped coma as a diagnostic criterion, because many very ill patients never lose consciousness.

Rare but feared, mostly pediatric, and largely iatrogenic — the heralding cue is a deteriorating conscious level during treatment. The nurse’s move: frequent conscious-level checks, enforce the speed limits (glucose ≤ 90–120 mg/dL/h, osmolality 3.0–8.0 mOsm/kg/h, Na⁺ ≤ 10 mmol/L per 24 h), and report any new drowsiness immediately.

Prophylactic-dose low-molecular-weight heparin is used unless thrombosis is suspected (ADA/EASD 2024 consensus). The nurse watches for the arterial checklist: new chest pain, focal weakness, a cold pulseless limb — each is a report-now event.

A mixed picture is treated as DKA, including the full insulin rate of 0.1 units/kg/h — which is why the admission BHB and pH matter so much.

Collapsing heat production plus failed thermoregulation — with altered mentation, this is the classic presenting pair of myxedema coma. Most cases occur in winter.

The respiratory center loses its response to CO₂; with a weak diaphragm and swollen airway, CO₂ accumulates — CO₂ narcosis is the primary cause of the coma. Anticipate ABG and mechanical ventilation.

The nurse’s moves: continuous temperature, cardiovascular, and respiratory monitoring; passive rewarming only (active warming vasodilates → shock); hold sedatives/opioids; anticipate ICU, mechanical ventilation, and IV hydrocortisone before IV levothyroxine.

This is why older adults and cardiac patients start low and titrate slowly. On replacement, chest pain, palpitations, or any new dysrhythmia is a report-immediately finding; watch cardiac patients for angina and atrial fibrillation.

The thyroid-storm cluster: extreme hypermetabolism plus adrenergic overdrive tipping into a multi-system crisis. This is an ICU emergency — treatment starts before labs.

Precipitated by infection, surgery, trauma, an iodine load, or abruptly stopping antithyroid drugs. The nurse’s job is recognition: fever + extreme tachycardia + mental-status change in a hyperthyroid patient is storm until proven otherwise — treatment begins before the labs come back.

The hematoma is usually venous and develops rapidly — the emergency response is to reopen the wound at the bedside to evacuate the clot, so suture/clip removal equipment stays at hand. Hypocalcemia (transient in up to one-third of total thyroidectomies) announces itself as perioral tingling, cramps, tetany, or laryngospasm — hence Trousseau/Chvostek checks and IV calcium gluconate at the bedside. Nerve injury shows as hoarseness, weak cough, or lost pitch control — the routine voice check.

Glucocorticoid inhibits cytokine release, so patients may not mount fever or the typical inflammatory response. Risk rises linearly with dose and duration above 10 mg prednisone daily — which means absence of fever is not reassurance.

Mass effect from a pituitary macroadenoma. Most patients lack bitemporal hemianopsia because the lesions are typically microadenomas and only about 10% grow large enough to compress the optic chiasm — which makes new visual-field loss a significant finding, not an expected one.

The suppressed axis cannot generate a cortisol surge. Symptoms are non-specific and "can be mistaken for symptoms of intercurrent illness": weakness, malaise, nausea, vomiting, diarrhoea, abdominal pain, headache, fever, anorexia, myalgia, psychiatric change. Parenteral glucocorticoid is required for moderate-to-major stress, procedures under general or regional anesthesia, prolonged inability to take oral medication, or signs of hemodynamic instability or prolonged vomiting or diarrhoea — and adrenal crisis should be considered irrespective of the glucocorticoid type, route, or dose (2024 ESE/Endocrine Society joint guideline). The same risk follows curative surgery, when the tumour’s cortisol is gone but the normal axis has not recovered.

Glucocorticoid inhibits cytokine release, so the fever and inflammatory signs that would normally trigger escalation may never appear. Risk climbs linearly with dose and duration above 10 mg prednisone daily and rises further with concurrent immunosuppressants. Treat any unexplained deterioration in a steroid patient as possible infection and escalate rather than waiting for a temperature.

Long-term medium-to-high-dose glucocorticoid drives premature atherosclerosis in a dose-dependent pattern, and in Cushing’s disease "hypertension and the abnormalities of glucose metabolism are major predictors of morbidity and mortality." The thrombotic heralding cues are the familiar ones: unilateral calf swelling or pain, or sudden dyspnea with pleuritic chest pain — escalate immediately.

Cortisol deficiency prevents catecholamines from acting on adrenergic receptors while volume depletion and capillary leak strip the circulation. Untreated it advances to fever reaching 40.5 °C (105 °F) or higher, then circulatory collapse, cyanosis, shock, coma and death.

As many as half of patients develop shock with no preceding hypotension — a previously normal blood pressure is not reassurance and must never be used to downgrade concern in a patient with a compatible story.

Hyperkalemia from aldosterone deficiency — so this finding appears in primary disease. The progression by level: peaked T waves at 5.5–6.5 mEq/L, flattening or loss of P waves at 6.5–7.5, QRS widening at 7–8, severe arrhythmias and a sine-wave pattern at 8–10. Generalized muscle weakness and flaccid paralysis typically appear above 6.0 mEq/L.

Crises occur in 6–8% of patients with adrenal insufficiency annually (4–6 per 100 patient-years), with a mortality of 0.5 per 100 patient-years — and a 6% mortality rate even among well-educated patients, which is the honest reason teaching reduces but does not eliminate the risk. The heralding cue is the nonspecific prodrome, especially vomiting or diarrhea that stops oral steroid absorption, plus any drop in blood pressure. Recovery is not clean either: survivors report depression, chronic fatigue, inability to work and poor quality of life.

Hyperkalemia progresses on the ECG from peaked T waves (5.5–6.5 mEq/L) through loss of P waves (6.5–7.5) and QRS widening (7–8) to a sine-wave pattern (8–10). The sequence when ECG change is present is calcium gluconate first for membrane stabilization, then insulin with dextrose to shift potassium intracellularly, a β₂-agonist, bicarbonate if acidotic, then binders or dialysis. Chronic hyponatremia must not be corrected faster than 10 mEq/L in the first 24 hours, because rapid correction risks osmotic demyelination syndrome — though in crisis the sodium usually rises on its own as volume and cortisol are restored.

Progressive cerebral edema. At serum sodium below 115–120 mEq/L, coma and respiratory arrest follow — this is the end of a continuum that began with nausea, which is why the early cue is worth acting on.

The highest-risk presentation in the whole disorder. "Patients without an intact thirst mechanism can develop severe hypernatremia" because the compensation that protects everyone else is gone — so the absence of a complaint is itself the emergency finding.

Rising serum sodium pulls water out of cells; the skin texture is intracellular water loss you can feel, and brain-cell shrinkage produces the neurologic sequence. Symptoms emerge when sodium rises rapidly or exceeds 160 mEq/L.

Cumulative free-water loss with kidney and brain injury. The condition can reach collapse "in children and older patients" — the two groups least able to defend their own intake.

Osmotic demyelination syndrome. The signature is improvement followed by deterioration — the sodium normalizes, days pass, and then the neurologic injury declares itself. Risk is higher with hypokalemia, liver disease, malnutrition or alcohol use.

The heralding cue is the sequence, not any single value: nausea and malaise, then vomiting (the ominous sign), then headache, lethargy and obtundation. Severe SIADH complications include respiratory failure, seizures, hallucinations, coma and death. Poor prognostic indicators are severe hyponatremia, acute presentation and older age — though euvolemic hyponatremia does better than the hypovolemic and hypervolemic forms.

The heralding cue is improvement followed by deterioration: the sodium normalizes, the patient looks better, and several days later the neurologic picture appears. Risk factors are hypokalemia, liver disease, malnutrition and alcohol use. Prevention is the only real treatment — keep the correction within about 8 and no more than 10 mEq/L in 24 hours, recheck the sodium hourly to every 4–6 hours depending on the scenario, and remember that desmopressin or free water can be given if the correction has already run too fast.

The heralding cues are quantitative and easy to chart: rising urine output with a rising serum sodium and a falling weight. In the adipsic patient there is no thirst complaint at all, which removes the one warning the disorder normally provides. Correcting the hypernatremia is its own hazard — no more than 12 mEq in 24 hours or 0.5 mEq per hour, over 48 to 72 hours — because lowering it fast shifts water into brain cells and causes cerebral edema, seizures and permanent damage.

Severe hypocalcemia "can cause laryngospasm, tetany (involuntary muscle contraction), and seizures." After thyroidectomy, airway compromise "Can occur due to hemorrhage, swelling, or tetany." Airway emergency.

"Patients with severe hypocalcemia (serum calcium <7 mg/dL) or an acute decline in calcium levels may develop seizures or life-threatening arrhythmias," and QTc prolongation "may predispose to torsades de pointes."

Hemorrhage or hematoma threatening the airway. "Monitor surgical dressing for excessive bleeding (note that blood may pool to back of dressing)."

Hypercalcemic crisis — "severe hypercalcemia (>14 mg/dL), dehydration, altered mental status, and arrhythmias, necessitating urgent treatment."

IV calcium is the emergency treatment: "Intravenous calcium is indicated in patients with severe symptoms, prolonged QTC intervals, or acute symptomatic hypocalcemia." Calcium gluconate "is generally preferred due to a lower risk of tissue necrosis with extravasation," the bolus is given "over 10 to 20 minutes in conjunction with cardiac monitoring," and "Alkaline solutions, such as bicarbonate and phosphorus-containing solutions, should not be administered through the same intravenous line to avoid precipitation of calcium salts." Check and replace magnesium as ordered too — "Magnesium deficiency should always be corrected" or the calcium will not stay corrected.

"Ensure tracheostomy tray is nearby," check the dressing including the back of it, and "Keep neck in neutral position to prevent stress on suture line." An expanding hematoma is escalated at once — it may need "urgent evacuation under general anesthesia," and "In extreme cases of severe bleeding that compromises the airway, the wound may need to be reopened immediately at the bedside, with the potential for an emergency tracheostomy to secure the airway." Most patients go home the same day on oral calcium, so discharge teaching must cover the symptoms of low calcium.

Saline first: "Hydration is typically accomplished with a 0.9% saline infusion until the patient has an adequate urine output and becomes euvolemic" — with caution in heart or renal failure. Loop diuretics "should only be administered after adequate IV resuscitation is achieved." Calcitonin works fast but briefly; bisphosphonates take about 3 days to normalise calcium; dialysis is reserved for severe hypercalcemia with renal failure or intolerance of IV fluids. Replace potassium, magnesium and phosphate, which are often low too.

Hypertensive crisis — "can lead to cardiac arrhythmias, myocardial infarction, and even death," with stroke, pulmonary edema and hypertensive encephalopathy among the complications.

The abrupt loss of catecholamines on receptors that are still downregulated — "the most common complication following tumor removal," needing fluids and often vasopressors for several hours.

Insulin rebounds when catecholamines fall. "Hypoglycemia is another significant concern; blood sugar should be checked regularly every 4 to 6 hours."

Prevention is the treatment: alpha-blockade from diagnosis, no beta-blocker before alpha-blockade, no metoclopramide, no palpation of the abdomen, and no biopsy. During surgery hypertension is controlled with intravenous phentolamine, nitroprusside or a short-acting calcium-channel blocker such as nicardipine.

Caused by the sudden fall in catecholamines on downregulated receptors. "Tumor removal may be followed by a sudden drop in blood pressure that may require rapid volume replacement and intravenous vasoconstrictors (e.g., norepinephrine or phenylephrine)." The preoperative salt and fluid loading exists partly to blunt this. Up to half of patients are instead hypertensive for a few days, and persistent hypertension "may also signify a residual tumor."

Check glucose "regularly every 4 to 6 hours" after resection, in a monitored setting for 24 hours.

WEGOVY label: acute pancreatitis, "including fatal and non-fatal hemorrhagic or necrotizing pancreatitis," has been observed with GLP-1 receptor agonists. "Instruct patients to discontinue WEGOVY promptly and contact their physician if pancreatitis is suspected."

WEGOVY label: "Anaphylactic reactions and angioedema have been reported postmarketing. Discontinue WEGOVY if suspected and promptly seek medical advice."

StatPearls: larger leaks present with "marked abdominal pain, tachycardia, fever, leukocytosis"; leaks "can lead to peritonitis, sepsis, and organ failure if not managed quickly and effectively."

Active upper GI bleeding happening right now — the ulcer has eroded into a vessel.

Usually a lower source, but a brisk, large-volume upper bleed outruns acid conversion; paired with hematemesis it points upper — and fast.

Compensation has failed — class III hemorrhage and beyond. Declining urine output and confusion mark organ hypoperfusion.

The ulcer has perforated: gastric contents in the peritoneum. Tachycardia, rebound and guarding, absent bowel sounds — a surgical emergency.

Know the classes: up to 15% loss (~750 mL) barely moves the vitals; 15–30% (750–1500 mL) brings HR 100–120 with minimal pressure change; 30–40% drops the pressure with mental-status change and declining urine output; beyond 40%, narrow pulse pressure and minimal urine. The nurse’s job is to catch the tachycardia-and-orthostatics stage, not the hypotension stage. Overall UGIB mortality runs 2–10% — most deaths from comorbid disease, not exsanguination.

A surgical emergency: mortality runs up to ~25%, higher with delay, age, comorbidity, and malnutrition. Upright chest X-ray shows free air under the diaphragm in 75% — but can be normal early, so a normal film excludes nothing. The response set: aggressive resuscitation, oxygen, IV fluids, NPO, nasogastric tube, IV PPIs, broad-spectrum antibiotics, and emergency surgery (omental patch for duodenal perforation).

Fresh hematemesis, new coffee-ground emesis, recurrent melena or hematochezia, or a climbing pulse after treatment means the bleed is back — report immediately. Rockall score frames the stakes: ≤ 2 points predicts 4.3% rebleeding and 0.1% mortality; ≥ 6 points, 15% rebleeding and 39% mortality.

The presentation of variceal hemorrhage — thin-walled esophageal varices rupturing under portal pressure. Bleeding must be controlled quickly to prevent shock and death.

The triad cues of spontaneous bacterial peritonitis — infected ascitic fluid. SBP is also a classic encephalopathy precipitant, so confusion may be the first sign.

Hepatic encephalopathy — ammonia reaching a shunted brain. Mental-status change in a liver patient is reported at once — encephalopathy can progress from subtle slowing to coma.

The nurse anticipates the acute bundle: two large-bore (≥ 18-gauge) IVs, restrictive transfusion at hemoglobin < 7 g/dL (over-transfusion raises portal pressure and rebleeding), IV octreotide (50 µg bolus, then infusion), prophylactic ceftriaxone 1 g IV, and urgent EGD within 12 hours (AASLD, as reported by StatPearls). Balloon tamponade is a rescue bridge only — and the patient is intubated first.

Diagnosis is ascitic-fluid PMN ≥ 250/mm³ on paracentesis. Treatment: broad-spectrum antibiotics narrowed by culture, plus IV albumin 1.5 g/kg. In a cirrhotic with ascites, fever or new confusion means "tap the belly," not "watch and wait."

The nurse’s move is a two-track response: give and titrate lactulose to 2–3 soft stools/day — and hunt the precipitant (GI bleed? infection/SBP? constipation? sedative given? over-diuresis?). Any new mental-status change in a liver patient is reported immediately.

Third-spacing and SIRS are draining the intravascular space — the hypovolemic-shock pathway declaring itself. Fluid resuscitation is the counter-move.

Retroperitoneal or peritoneal bleeding from hemorrhagic pancreatitis tracking to the umbilicus. Uncommon (~1–3%) and typically late — most often day 3 or 4.

The same retroperitoneal hemorrhage tracking through fascial planes to the flank; classically tied to severe necrotizing disease. One case series found 37% mortality in pancreatitis patients with this sign — report it the moment you see it.

Hypocalcemia: calcium is being precipitated out of the blood by saponification of necrotic fat. Also risks seizures and QTc prolongation with arrhythmias — a report-immediately finding.

An obstructing stone with cholangitis on top of pancreatitis — the combination that triggers the urgent-ERCP (≤ 24 h) pathway.

ARDS complicating severe disease — systemic inflammation is now in the lungs; mechanical ventilation is often needed.

The nurse’s counter is the fluid protocol done right: lactated Ringer’s, moderate and goal-directed, titrated to urine output > 0.5 mL/kg/h and a falling BUN — reassessing within 6 hours. Persistent oliguria despite fluids is a report-now finding; severe AKI may need renal replacement therapy.

Report a falling calcium or any positive sign immediately and anticipate IV calcium gluconate 1–2 g over 10–20 minutes (gluconate is preferred over chloride — far less tissue-necrosis risk if it extravasates), with an infusion if hypocalcemia persists.

Rising respiratory rate, falling SpO₂, or new shortness of breath in a pancreatitis patient is never “anxiety” until proven otherwise — escalate immediately.

Antibiotics are not given prophylactically — they’re reserved for confirmed or strongly suspected infection, and drainage of infected necrosis is ideally delayed beyond 4 weeks. New flank or periumbilical ecchymosis, sepsis signs, or hemodynamic collapse with a tense abdomen (compartment syndrome needs rapid surgical decompression) are all emergency escalations.

The rhythm disappearing means the wall itself is in trouble — the transition that suggests strangulation and ischemia. Pain disproportionate to exam findings carries the same meaning: a surgical emergency.

The peritoneum is irritated: perforation or peritonitis. Rebound (Blumberg sign) is pain on quick release of gentle pressure; involuntary guarding is muscle rigidity the patient cannot suppress.

With leukocytosis and acidosis, these are the sourced evidence-of-strangulation cues — the systemic signature of dying bowel, and an indication for surgery.

With a competent ileocecal valve the closed-loop colon dilates the thin-walled cecum — RIF pain signifies impending cecal perforation.

The nurse is the tripwire: report fever, tachycardia, localized tenderness, leukocytosis, acidosis or rising lactate, colicky pain turning constant and severe, or pain out of proportion to the exam — these are the sourced indications for surgical intervention. Minutes of delay are bowel.

Rigidity, rebound tenderness, and guarding are the bedside alarm; free air under the diaphragm on an upright film is the radiographic one. In LBO, duration of cecal distension correlates with perforation risk — which is why serial imaging and serial exams are ordered.

Perforation vents the trapped intraluminal pressure — transient relief that is often followed by worsening clinical status as peritonitis begins. Report immediately; do not reassure.

A high fever after the low-grade early course can signal a burst appendix — pair it with the abdomen and vitals and report.

Generalized peritonitis: the whole peritoneum is inflamed, the abdominal wall splints involuntarily, and the gut stops moving. Increased pain when the bed is bumped is the same sign.

The sepsis trajectory of peritonitis — SIRS progressing toward septic shock. Vital-sign deterioration outranks every abdominal finding.

The heralding cues are sudden pain relief, a high fever spike, a rigid board-like abdomen with absent bowel sounds, and vital-sign deterioration. The nurse reports immediately and anticipates fluids, broad-spectrum antibiotics, and urgent source control — this requires immediate emergency treatment.

Atypical, subtle presentations (cephalad-displaced appendix, unreliable WBC, late fever) delay diagnosis — exactly what the fetus cannot afford. Ultrasound first, MRI liberally when inconclusive; laparoscopic appendectomy is the standard of care, with left-lateral positioning after 20 weeks. Free perforation means urgent laparotomy.

Inflammation has reached the muscle layer and paralyzed the colon — toxic megacolon. The Jalan criteria pair a colon > 6 cm on film with systemic toxicity (fever, tachycardia, WBC > 10,500, anemia) and dehydration, electrolyte derangement, hypotension, or altered sensorium. The colon is dilating, not emptying.

Steroids can blunt peritoneal signs, so a fever that will not break on steroid therapy "should raise concern for possible perforated bowel." Perforation carries a mortality of 40% or more.

Uveitis runs independently of bowel activity and requires "prompt treatment with topical or systemic corticosteroids to prevent complications such as vision loss" — an immediate ophthalmology referral, not a routine eye complaint. Low back pain and stiffness worse with rest point to the other independent EIM, ankylosing spondylitis.

IBD is a hypercoagulable state and the risk escalates during flares, independent of bowel activity; a hospitalized, dehydrated, immobile flare patient is stacked for DVT/PE.

The most common cause of death in UC (≈ 5% of acute severe UC). Jalan criteria: colon dilation > 6 cm plus ≥ 3 of fever > 38 °C, HR > 120, WBC > 10,500/µL, anemia plus ≥ 1 of altered sensorium, hypotension, dehydration, electrolyte abnormality. Management bundle: ICU, NPO, IV fluids with electrolyte correction, stop opioids/anticholinergics/antimotility agents, IV steroids, antibiotics if infection is suspected, twice-daily labs and films, and early colorectal surgery consult — subtotal colectomy with end ileostomy if the 3-day steroid + 3-day rescue trial fails or the colon perforates. Medical management succeeds in about half.

Steroids can mask peritonitis, so persistent fever on steroids = suspect perforation. Mortality in toxic megacolon climbs from 0–2% with early treatment to 40% or more once the colon perforates. "Emergency surgery is indicated for … intestinal perforation, refractory bleeding, or toxic megacolon." Acute severe UC mortality is now around 1% — down from about 25% before steroids — because these cues are acted on.

GERD may mimic cardiac pain and the two cannot be separated at the bedside — "cardiac disease must first be excluded." Ischemic pain is retrosternal, persistent ≥ 20 min at rest, and unaffected by breathing, movement, or palpation; diabetic patients may present atypically with malaise instead of pain. ECG and troponin, not a trial of antacid, decide.

Gastric volvulus: the stomach has twisted more than 180° inside the hernia, closing both ends. Present in up to 70% of acute organoaxial volvulus. Do not force the tube — escalate for emergency surgical evaluation; strangulation follows.

Strangulation: the incarcerated stomach has lost its blood supply — obstruction, necrosis, perforation, and sepsis. Labs may show a rising WBC and lactate. "A medical emergency that requires urgent surgical intervention."

The stomach twists more than 180° inside a paraesophageal hernia — the most common cause of secondary volvulus — and the chain runs obstruction → strangulation → necrosis → perforation → shock — historically 30–50% mortality without timely intervention, about 6% with prompt surgery. Management is emergency surgery: untwist, repair the hiatus, fix the stomach to the abdominal wall (gastropexy or gastrostomy), resect if necrotic. High-risk patients may get upright positioning, gentle NG decompression, and resuscitation first. A chronic volvulus in a fit patient is repaired electively for the same reason. Never force the tube; escalate.

Hepatic encephalopathy — ammonia accumulation, blood–brain-barrier disruption, astrocyte swelling, cerebral edema. With an INR ≥ 1.5 this defines acute liver failure: early transfer to a liver transplant center, and no sedatives that would mask the trend.

Loss of synthetic function — the failing liver stops making clotting factors. INR, not transaminase height, is the severity marker; hematemesis or bloody stools are reasons to seek emergency care.

The failing liver cannot sustain glucose output — part of the ALF picture, and a treatable contributor to altered mental status that must be checked before the confusion is blamed on ammonia alone.

Massive immune-mediated necrosis collapses synthetic function and swells the brain. Rare with HAV (< 1% of adults) and HBV (0.5–1%, ~80% mortality when it occurs), but about 20% with HBV + HDV and concentrated in pregnancy with HEV. About 30% of ALF patients undergo transplantation, and some patients survive only with an emergency liver transplant — so the rule is early transfer to a transplant center, serial neuro checks, glucose monitoring, no sedatives, and correcting the INR only for bleeding or procedures.

The mechanism is unclear (a proposed Th1→Th2 immune shift and higher viral loads); fulminant failure may present with bleeding, eclampsia, or DIC. Ribavirin, the off-label drug for chronic HEV, is contraindicated in pregnancy — management is supportive, and any pregnant traveler with jaundice is a now-emergency.

Bacteria have climbed into the obstructed, pressurized duct and are translocating into blood: acute cholangitis, ≈ 50% mortality untreated. Sensitivity is only 26.4%, so the full triad is the exception — fever alone (≈ 90%) or jaundice alone (60–70%) in a patient with a duct stone already demands the TG18 work-up and urgent decompression.

Septic cholangitis with organ dysfunction — decreased consciousness or vasopressor-dependent hypotension alone makes it TG18 Grade III. Biliary drainage is needed within 6 hours when the patient is hemodynamically unstable; laparoscopy is contraindicated in septic shock.

Empyema (a pus-filled gallbladder, the most severe form of acute cholecystitis) progresses to systemic sepsis; emphysematous cholecystitis (gas-forming Clostridia/Klebsiella/E. coli in an ischemic wall; diabetes in 30–75%) — early symptoms "may be deceptively mild despite rapid progression to gangrene and perforation." Mortality 15–25%; free perforation 30%.

Empyema (pus-filled gallbladder, 5–15% of acute cases; diabetes and immunosuppression raise the risk) announces itself with high fever, chills, rigors, a tender palpable mass and a left-shifted leukocytosis — broad-spectrum antibiotics plus urgent cholecystectomy or percutaneous drainage. Emphysematous cholecystitis (gas in the wall or lumen, ≈ 1% of cases, men 3:1, diabetes in 30–75%) looks mild and then collapses toward sepsis and shock; ultrasound is fooled by gas, contrast CT confirms, emergency cholecystectomy treats. Perforation may also form a pericholecystic abscess, biloma or cholecystoenteric fistula.

Treatment is early antibiotics plus urgent biliary decompression — ERCP with sphincterotomy is the gold standard (94–98% effective); PTC, EUS-guided or surgical drainage are the alternatives. TG18 (as reported by J Clin Med 2023): drainage within 6 h with hemodynamic instability or septic shock; ERCP within 24 h cut mortality ≈ 20% versus later in meta-analysis; intervention within 24–48 h is the window to prevent septic shock. Poor-outcome factors: age, renal failure, hepatic abscess, malignancy. Charcot’s triad is only 26.4% sensitive — do not wait for all three.

Open RN: "changes in vitals and/or the quality of their pain can indicate a complication is occurring." A palpable mass can mean an abscess.

Perforation with peritonitis: complicated diverticulitis "may manifest with diffuse abdominal pain, fecaluria, pneumaturia, or peritonitis, accompanied by signs and symptoms of sepsis," with "involuntary guarding and rebound tenderness." Hemodynamic instability with peritonitis means emergent surgery.

"Any bleeding associated with diverticulosis is painless"; it "may be severe and life-threatening." Heavy bleeding is an emergency; even a small amount should be seen by a doctor right away.

"Patients presenting with hemodynamic instability and signs of peritonitis are candidates for emergent surgery." WSES recommends the Hartmann procedure "for managing diffuse peritonitis in critically ill patients." The 30-day mortality for everyone admitted with acute diverticulitis is 2.7%, about 7% after emergent surgery.

"Colonoscopy in a prepped colon remains the best test to identify the source of bleeding if blood is present in the stool." Cross-reference the GI bleeding page for lower-GI bleeding management.

"Patients can present with acute surgical emergencies, usually due to tumor-related obstruction, perforation, or bleeding." Bowel obstruction and perforation are also indicators of poor prognosis.

"Emergent operations like fecal diversion or stent placement may be necessary to provide obstruction relief before definitive resection" — a diverting ileostomy or end colostomy, or a temporary stent for decompression. Obstruction and perforation are indicators of poor prognosis.

"Immediately and permanently discontinue oxaliplatin injection for hypersensitivity reactions and administer appropriate treatment for management of the hypersensitivity reaction."

A retracted stoma "may recede inside the peritoneum, which leads to the discharge of fecal content inside the abdomen leading to peritonitis, which is an emergency." A parastomal hernia "may lead to bowel incarceration and strangulation" in severe cases.

"Malabsorption syndromes typically are not life-threatening. However, the severity and duration of some malabsorption syndromes can be life-threatening or even fatal. Examples include severe malnutrition from prolonged EPI, life-threatening electrolyte disturbances from prolonged, intractable diarrhea, and bowel perforation."

Possible toxic megacolon. StatPearls: these "require immediate medical attention."

Fulminant CDI — hypotension, shock, ileus or megacolon.

StatPearls: peritonitis features "may indicate bowel perforation."

StatPearls: patients with severe diarrhea and systemic signs such as dehydration, septic shock or toxic megacolon unresponsive to medical therapy need gastroenterology, intensive care and surgical consultation; "in severe instances, emergency colectomy may be warranted."

Pulmonary embolism: "Untreated disease may lead to PE, which can be fatal."

Acute cholangitis from obstructed biliary flow (stent occlusion is a named cause). "Acute cholangitis is a life-threatening medical condition that can be treated if identified early."

Mechanism: "pancreatic enzymes erode the ligated stump of the gastroduodenal artery" — often after a pancreatic leak.

"Initial medical therapy relies on early fluid resuscitation and appropriate antibiotic coverage. Delay in treatment can lead to septic shock." "In severely ill patients with sepsis, treatment is immediate or emergent biliary drainage"; "ERCP is the gold standard." "Without prompt treatment, these patients have a mortality rate of 50%." Malignancy raises the risk of death.

Progression toward coma. Caregivers should "seek urgent medical help, particularly in cases of rapidly worsening confusion, drowsiness, or new-onset agitation"; StatPearls lists deteriorating mental status among signs needing "Immediate medical attention."

"In advanced stages, hepatic encephalopathy may lead to coma, which can be life-threatening." In the coma stage the lactulose label warns of the "danger of aspiration," so lactulose is given rectally.

Possible infection such as spontaneous bacterial peritonitis — a trigger. StatPearls: "Immediate medical attention should be sought if symptoms such as fever, increased abdominal swelling, worsening jaundice, or deteriorating mental status occur."

GI bleeding — the first trigger on the list. NIDDK: "People who vomit blood or have black or bloody stools should go to a hospital right away."

Lactulose goes in as a retention enema "when the adult patient is in the impending coma or coma stage … and the danger of aspiration exists"; KASL recommends enema "in severe HE (West Haven criteria grade ≥3)." Supportive care prevents "fall-related injuries or aspiration pneumonia" (KASL); higher grades may need ICU care.

"Increased intracranial pressure can result in manifestations such as systemic hypertension, bradycardia, respiratory depression (known as Cushing triad), seizures, and abnormal brainstem reflexes." StatPearls lists "Elevating the head end of the bed by 30 degrees." among ICP measures.

Aspiration from obstruction or poor motility can cause "aspiration pneumonia, the formation of lung abscesses, or acute respiratory distress syndrome (ARDS), all of which are potentially life-threatening and require prompt medical attention."

Possible thoracic anastomotic leak: "Thoracic leaks, on the other hand, are life-threatening and demand operative exploration"; leaks lead to "mediastinitis, sepsis."

Cervical leaks "tend to be minor" and can be managed by opening the neck wound. "Cervical incisions that become red or inflamed or fevers starting about three days postoperatively indicate a leak until proven otherwise." Management ranges from antibiotics, drainage and nothing by mouth to surgical repair.

Tumor invasion can create "tracheoesophageal or bronchoesophageal fistulae, leading to recurrent aspiration pneumonia, lung abscesses, or sepsis." After esophagectomy, the conduit "will lose their peristalsis," so upright positioning after eating prevents aspiration.

Pulmonary edema from volume overload — the inability to excrete body water backing up into the lungs, especially in the oliguric phase.

Hyperkalemia destabilizes cardiac conduction — this is the finding that kills AKI patients, and it demands an immediate ECG and potassium level.

End-stage uremic encephalopathy — and a complicated-uremia indication for urgent dialysis.

The treatment ladder, in order: calcium gluconate first for any ECG changes — it stabilizes the cardiac membrane but does not lower potassium; then insulin + dextrose and albuterol to shift K⁺ into cells; bicarbonate if acidotic; cation exchangers (patiromer, sodium zirconium cyclosilicate; older sodium polystyrene sulfonate has questionable efficacy); diuretics to excrete (never as monotherapy); dialysis is definitive. Aggressive intervention is warranted at K⁺ ≥ 6.5, or at any level with ECG changes or neuromuscular weakness.

Cautious fluids become fluid restriction once the patient is oliguric and overloaded (previous day’s urine output + losses + 500–1,000 mL insensible). Overload refractory to diuretics is an urgent dialysis indication — falling saturation with crackles in an oliguric patient is a call-now finding.

Intake continues while excretion fails and aldosterone resistance grows. Above 6.5 it is a medical emergency — potassium this high can affect the heartbeat and cause death; refractory hyperkalemia is an urgent dialysis indication.

Uremic encephalopathy — toxins reaching the brain, progressing to seizures, stupor, and coma. An absolute indication for immediate dialysis.

Report a K⁺ above 6.5 immediately — this is a medical emergency, and refractory hyperkalemia is an urgent indication for dialysis. Reinforce the potassium-restricted renal diet and screen the med list for contributors (ACE inhibitors, nonselective beta-blockers) and for salt substitutes, which are potassium salts.

Both are absolute indications for immediate dialysis. New confusion, a flapping tremor, or chest findings in a stage 4–5 patient are report-now cues — not "expected uremia."

Cloudy or unusually colored drained effluent + abdominal pain (± fever, nausea/vomiting) = report immediately; an effluent WBC > 100/µL (0.1 × 10⁹/L) with > 50% neutrophils suggests infection. Prevention is strict aseptic technique with every exchange — and never-ending reinforcement of that teaching.

The nurse’s tripwire is the trajectory: fever with hypotension, tachycardia, or new confusion in a UTI patient is a sepsis screen, not a recheck-in-an-hour. And failure to improve within 24–48 hours of appropriate antibiotics means obstruction, abscess, or resistance — escalate for imaging, don’t wait it out.

Suspect these when a pyelonephritis patient has severe pain, a stone history, diabetes, or simply isn’t responding on schedule — the fix is drainage or surgery, and no antibiotic substitutes for it.

The most important single finding on this page. Fever, pyuria, hypotension or unexplained tachycardia in a patient with an obstructing stone means obstructive pyelonephritis and urosepsis risk — and delaying decompression can raise the risk of death by about 30%.

The stated criteria for urosepsis — read together: the white count alone is not the trigger, because a raised count is common in colic without infection; the fever, the pyuria and the hemodynamics are.

Obstruction of a solitary functioning kidney or bilateral obstruction. It is an explicit indication for urgent urologic intervention — there is no renal reserve left to wait with.

"Prompt surgical drainage of the renal pelvis is essential, as antibiotics alone are insufficient to resolve the condition." The cost of waiting is real: delays in decompression can raise the risk of death by about 30%, and postponing drainage beyond 2 days significantly worsens outcomes. Treatment is urgent drainage — cystoscopy with double-J stenting or percutaneous nephrostomy — with nephrostomy preferred in the critically ill because it needs only minimal sedation and local anesthesia and minimizes manipulation of the infected kidney. The stone itself is addressed after the infection is drained.

They cause "complete and persistent obstruction of the kidney causing permanent renal damage, pyonephrosis, sepsis, chronic pyelonephritis, and renal failure," and chronic irritation "can rarely result in squamous cell carcinoma of the renal pelvis," whose average 5-year survival is under 10%. Recurrence is the other trap: about 85% if residual fragments are left behind, falling to about 10% after complete extraction — which is why the goal is complete removal of every fragment rather than symptom relief.

Pulmonary-renal syndrome until proven otherwise. The alveolar and glomerular basement membranes share the α-3 chain of type IV collagen, so one antibody attacks both. Hemoptysis ranges from subtle to life-threatening, with dyspnea, tachypnea, basilar inspiratory crackles and cyanosis — and it "may be the first clinical feature."

The vasculitis clue set. These findings mean systemic disease rather than a self-limiting nephritis, and they belong to the ANCA-associated vasculitides that make up the largest share of adult rapidly progressive glomerulonephritis.

Hypertensive encephalopathy — a listed complication of nephritic syndrome and a named acute-phase complication of post-streptococcal disease. The blood pressure that seemed like a number to monitor has become the thing causing neurologic injury.

Hyperkalemia, a listed complication of nephritic syndrome, from potassium the failing kidney cannot excrete. Symptoms typically appear above 6.0 mEq/L — well past the point where the ECG has already begun to change.

Rapidly progressive glomerulonephritis. Crescents are forming, and once fibrosis develops, "loss of renal function becomes irreversible." Higher creatinine at presentation, anuria or dialysis dependence all predict a poor outcome — which makes the speed of recognition part of the treatment.

The alveolar and glomerular basement membranes share the α-3 chain of type IV collagen, so a single autoantibody attacks both organs. Pulmonary hemorrhage may require mechanical ventilation. Plasma exchange is indicated — but the two diseases are governed by opposite logics. In ANCA-associated vasculitis, severity decides: the KDIGO 2024 ANCA guideline (Practice Point 9.3.1.9) says consider plasma exchange for (1) serum creatinine above 3.4 mg/dL (> 300 μmol/L), (2) a dialysis requirement or a rapidly rising creatinine, or (3) diffuse alveolar hemorrhage with hypoxemia. In anti-GBM disease, futility decides — which is why no creatinine threshold exists on that side. KDIGO 2021 Recommendation 11.2.1 recommends cyclophosphamide, glucocorticoids and plasmapheresis for all patients with anti-GBM glomerulonephritis except those meeting all three of: treated with dialysis at presentation, 100% crescents or more than 50% global glomerulosclerosis on an adequate biopsy, and no pulmonary hemorrhage. Read that carefully — dialysis at presentation is one leg of an exclusion, not an indication, and pulmonary hemorrhage overrides the exclusion entirely, so a dialysis-dependent patient with 100% crescents is still treated if they are bleeding into their lungs. The two arms meet in one rule: KDIGO 2024 Practice Point 9.3.1.10 adds plasma exchange for an overlap syndrome of ANCA-associated vasculitis and anti-GBM disease, which is why the dual-antibody result in the serology panel changes management rather than merely labelling it. Any hemoptysis in a patient with glomerulonephritis is treated as this until proven otherwise.

Up to 80% of post-streptococcal patients are hypertensive, and while it "resolves in most cases within 10 days," the interval between presentation and resolution is exactly when the encephalopathy happens. The management sequence matters: salt restriction, fluid restriction and a loop diuretic come first, with an antihypertensive added for blood pressure that stays elevated despite them.

The ECG is the action trigger rather than the number alone: peaked T waves at 5.5–6.5 mEq/L, loss of P waves at 6.5–7.5, QRS widening at 7–8, and a sine-wave pattern at 8–10. In a patient whose urine output is falling, the potassium is the value that turns a slow renal problem into an immediate cardiac one, which is why dietary potassium restriction sits beside sodium restriction on this page.

The outcome is a direct function of how early treatment starts. Focal disease with more than 50% normal glomeruli shows over 90% renal recovery at 5 years; disease with more than 50% globally sclerosed glomeruli shows under 25%. Untreated pauci-immune disease carries 80% mortality, and aggressive immunosuppression raises survival to 75% at 5 years. In anti-GBM disease the presenting creatinine is decisive: below 5.7 mg/dL, 1- and 5-year survival were 95% and 94%, while dialysis-dependent patients at presentation had only 8% recovery of renal function at 1 year. That figure is the reason treatment decisions in anti-GBM disease turn on futility rather than severity — it is the logic the exclusion rule encodes, and why pulmonary hemorrhage still overrides it.

Pleural effusion and abdominal distension splint the diaphragm and cut tidal volume. This is an explicit indication for hospital admission in a child, not a finding to observe overnight.

Urinary loss of IgG and complement leaves encapsulated organisms un-opsonized, so severe infection — sepsis, pneumonia, peritonitis — can be the presenting event rather than a late complication.

Spontaneous bacterial peritonitis in an immunoglobulin-depleted patient with a belly full of fluid. The pain is the cue; the fever may or may not be there yet.

Antithrombin III and protein S have been lost in the urine while procoagulant factors rise. A deep vein thrombosis of the calf or a pulmonary embolus may be the first indication that nephrotic syndrome exists at all.

Renal vein thrombosis — the clot forms in the vein draining the very kidney that caused the hypercoagulable state.

Antithrombin III and free protein S leave in the urine while fibrinogen and factors V and VII rise. The 10-year cumulative incidence of VTE reaches 10%, and renal vein thrombosis is a recognized and frequent complication. Membranous nephropathy carries the highest hazard — adjusted HR 10.8 versus IgA nephropathy, with FSGS at 5.9. A clot may be the first sign the patient ever has.

Urinary loss of IgG and complement factors leaves the patient unable to opsonize encapsulated organisms for phagocytosis. Fever in a nephrotic patient is treated as a potential emergency, not a viral nuisance — and spontaneous bacterial peritonitis hides inside the abdominal distension you have already attributed to ascites.

The outlet has closed completely. Acute retention is painful by definition, and the pain, bloating, and severe urgency are the diagnostic cluster that separates it from the chronic form.

The autonomic response to bladder overdistension is a systemic event, not just discomfort — which is why acute retention is monitored with vital signs rather than treated as a plumbing nuisance.

Chronic high-pressure retention is impeding ureteral drainage and producing bilateral hydronephrosis. The kidney is in trouble even though the patient may feel entirely well — this is post-renal acute kidney injury announcing itself on a routine panel.

Obstructive pyelonephritis — infected urine behind a blockage. It is a surgical emergency requiring drainage by percutaneous nephrostomy or ureteral stent because it "rapidly progresses to urosepsis and septic shock."

The opening sequence of TUR syndrome — dilutional hyponatremia from absorbed hypotonic irrigation fluid. It progresses to nausea, visual disturbance, hemolysis, coma and death if unrecognized.

Either active bleeding from the resection bed or a clot obstructing the catheter so that irrigant accumulates in the bladder. Both need immediate assessment — the pain and urgency suggest the bladder is filling behind a blockage.

Rising bladder pressure impedes ureteral drainage. Renal blood flow falls by 50 to 60% within 24 hours of obstruction, and prolonged obstruction drives tubular dilation, inflammation and fibrosis toward irreversible nephron loss. It "can be identified by unexplained renal failure on blood tests and bilateral hydronephrosis on ultrasound or CT imaging studies" — which is to say, it is usually found by a lab result rather than a symptom.

A surgical emergency: emergency drainage by percutaneous nephrostomy or ureteral stent is mandatory because it "rapidly progresses to urosepsis and septic shock." Antibiotics alone do not resolve infection behind an obstruction — the pus has to come out.

Symptoms emerge at a serum sodium at or below 125 mEq/L and are likely around 120 mEq/L. It belongs to monopolar resection, which requires a non-conducting irrigant; bipolar resection in normal saline has essentially eliminated the risk, and even with monopolar the incidence is about 20 per 1,000 procedures. Severe cases are treated with 3% hypertonic saline, raising sodium by about 4–6 mEq/L over 1–2 hours to relieve symptoms and by no more than 10 mEq/L in the first 24 hours (to avoid osmotic demyelination).

Urinary retention. NIDDK lists it under "Seek care right away": "can’t pass urine or empty your bladder, which is a sign of urinary retention."

StatPearls: "Signs and symptoms of emergent conditions, such as cauda equina syndrome, and reversible causes should be investigated." See the low-back-pain page for cauda equina signs.

"In some cases, angioedema occurred after the first dose."

Possible systemic BCG infection: "Febrile episodes with flu-like symptoms lasting more than 72 hours, fever ≥103°F" suggest it, and "Deaths have been reported as a result of systemic BCG infection and sepsis." BCG is stopped and the patient "immediately evaluated and treated for systemic infection" (label).

Systemic BCG infection (BCG-osis): "Deaths have been reported as a result of systemic BCG infection and sepsis." StatPearls: it can present with "mental status changes, chills, high-grade fevers … respiratory failure, hypotension" and "may occur years after the last BCG instillation."

A healthy stoma is moist, above skin level and pink to red. Ostomy follow-up guidance (intestinal stomas; an ileal-conduit stoma is itself ileum) tells patients to report a darkened stoma immediately because it indicates ischemia (an ischemic stoma may look purplish, nonperfused or progressively necrotic), and necrosis at or below the fascia requires immediate surgical revision.

Label: "If a patient develops persistent fever or experiences an acute febrile illness consistent with BCG infection, BCG treatment should be discontinued and the patient immediately evaluated and treated for systemic infection," with "2 or more antimycobacterial agents." The label gives two fever cutoffs in different sections — "fever ≥103°F" (Warnings) and, in the adverse-reactions section, fever of ≥38.5 °C (101.3 °F) or epididymitis, prostatitis or orchitis "persisting longer than 2 to 3 days suggest active infection"; both are listed, not merged. It can appear "years after the last BCG instillation."

Possible ruptured intracranial aneurysm (subarachnoid hemorrhage). KDIGO: "Recognition of such symptoms should prompt immediate medical attention," with evaluation in an emergency department. NIDDK: "Large brain aneurysms are life threatening and need immediate medical treatment."

KDIGO recommends informing every adult with ADPKD about the risk, and screening selected patients. Risk rises "with a personal or family history of cerebral aneurysm or subarachnoid hemorrhage, female sex, and older age," and "Smoking, hypertension, and excess alcohol intake are modifiable risk factors." See Subarachnoid Hemorrhage & Cerebral Aneurysm.

Patients are told to "immediately stop taking JYNARQUE and notify their healthcare provider if they have symptoms or signs (e.g., abnormal transaminase elevations) of hepatic injury (such as fatigue, anorexia, nausea, right upper abdominal discomfort or tenderness, vomiting, fever, rash, pruritus, icterus, dark urine or jaundice)."

At Hgb below ~7–8 g/dL, the myocardium itself is hypoxic — anemia can precipitate acute coronary syndrome. Stop activity and escalate now.

The neutropenia arm of pancytopenia — neutropenic fever is an emergency-tier finding.

Any chest pain in an anemic patient is a stop-and-escalate finding: seat the patient, get vitals and a 12-lead ECG, and notify — anticipate transfusion (indicated below Hgb 7, or 8 with ACS).

Infection + bleeding + fatigue together = think marrow failure. Institute infection and bleeding precautions and escalate immediately; definitive care is transplant or triple immunosuppression.

Functional asplenia strips the defense against encapsulated organisms — a febrile child with SCD can die of sepsis rapidly. NHLBI: this fever warrants immediate attention and antibiotic treatment.

The presentation cluster of acute chest syndrome — pulmonary microvascular occlusion, which can present on arrival or develop during a hospitalization for a pain crisis. A drop of more than 2% from the patient’s steady-state room-air SpO₂ counts.

Splenic sequestration: sickled cells obstruct splenic venous drainage and the child’s blood volume pools in the spleen — about half present hemodynamically unstable, and severe cases collapse into hypovolemic shock.

Sickled cells obstruct penile venous outflow; ~35% of males with sickle cell anemia are affected. Past 4 hours it is a urologic emergency requiring corporeal aspiration or shunt surgery.

Stroke — without primary prevention ~10% of children have overt stroke and 20–35% carry silent cerebral infarcts. ASH calls for transfusion within 2 hours of symptom onset.

Watch every admitted VOC patient for it — pain-limited breathing and sedating opioids both hypoventilate the lungs into it. The nurse’s moves: oxygen to keep SpO₂ > 92%, immediate provider notification, and anticipate chest X-ray, empiric antibiotics (a third-generation cephalosporin such as ceftriaxone plus a macrolide such as azithromycin), and transfusion — exchange transfusion for severe cases to bring HbS below 30%. Avoid large-volume IV fluids (pulmonary edema) and oversedation. Incentive spirometry every 2 hours while awake is the prevention.

Treat as impending shock: rapid escalation, careful RBC transfusion in small aliquots (5–10 mL/kg) — the sequestered blood re-enters circulation ("autotransfusion"), so overshooting past a hematocrit of 35% risks hyperviscosity. Recurrence after a first crisis is 50–78%, which is why parents are taught to palpate the spleen daily.

Fever above 101.3 °F (38.5 °C) in a child with SCD is an emergency demanding immediate evaluation and antibiotics. The prevention stack: prophylactic penicillin until age 5, pneumococcal and meningococcal vaccination, yearly influenza, COVID-19 as recommended — pneumococcal vaccination also cut acute chest syndrome incidence.

Any sudden focal deficit, confusion, or trouble speaking/seeing/walking is an emergency: urgent neurologic consultation and CT, and per ASH 2020, blood transfusion without delay beyond 2 hours of symptom onset. Prevention is the annual TCD program — since TCD-based screening began, childhood stroke incidence has fallen.

Platelets and clotting factors have been consumed in the microvasculature, so nothing seals anywhere. The number of separate, unrelated sites is what distinguishes DIC from a local surgical bleed — one oozing wound is surgery, four oozing sites is a coagulopathy. In practice the line and cannula sites are the earliest cue most nurses will see, because they are inspected more often than gums.

The thrombotic arm of the same disease — microthrombi shut down the distal circulation. Clots "can reduce or block blood flow, which can damage organs," and it is happening in the same patient who is bleeding.

Renal microthrombi plus hypoperfusion. Read this as an organ-failure cue, not a fluid cue — the response is escalation, not simply more intravenous fluid.

Cerebral microvascular occlusion and hypoperfusion; the sources also list stroke among the complications. A change in mental status in a septic or postpartum patient who is oozing is an escalation trigger in its own right.

The presentation of acute promyelocytic leukemia, where the leukemic cells themselves drive the coagulopathy — suspected APL is to be "immediately hospitalized and managed as a medical emergency."

This is the thrombotic arm doing its damage while attention is on the bleeding. DIC doubles the death rate of whatever caused it: "mortality rates have been shown to double in patients who are septic or those with severe trauma if they also have DIC." Because it affects multiple organ systems, "most survivors have a prolonged recovery period."

Two findings carry a borrowed advance warning: in immune thrombocytopenia, oral purpura and gross hematuria "may precede severe hemorrhage" — treat them the same way here. Patients and families need to understand "the importance of timely medical evaluation when new bleeding symptoms occur."

The same microthrombi that consume the clotting factors occlude the distal circulation. Assess perfusion of fingers, toes, ears and nose at every check — in a patient whose dominant problem looks like bleeding, the extremities are where the clotting arm becomes visible.

A change in mental status in a septic or postpartum patient who is oozing has two possible explanations, and both are emergencies: cerebral microvascular occlusion, or intracranial bleeding into a patient who cannot clot. Either way it is escalated, not observed.

Critical thrombocytopenia — patients are "more susceptible to spontaneous hemorrhage," meaning bleeding without any provoking injury. Note this is the 10,000 threshold, distinct from the 50,000 procedural-risk threshold.

The warning symptoms of intracranial hemorrhage — the feared complication of ITP, with most cases occurring below 10,000/μL. Recent head trauma in such a patient carries the same weight as the symptoms themselves.

Mucocutaneous bleeding "ranging from mild petechiae and epistaxis to severe and potentially life-threatening gastrointestinal, intracranial, or urinary tract hemorrhage." The GI tract is a large mucosal surface with no external warning sign until blood appears.

The counter-intuitive heart of HIT: platelets are being consumed in clots, so the low count and the thrombosis are the same event. Up to 50% of HIT patients develop thromboembolic complications, with mortality up to 30%.

Both are 2-point findings on the 4Ts thrombosis criterion. Skin necrosis reflects dermal microvascular thrombosis; the acute systemic reaction is an immediate antibody-mediated event on re-exposure.

Two sources, two halves — worth keeping straight. The greater-than-50% fall with a nadir at or above 20 is the 4Ts thrombocytopenia criterion, a scoring band rather than a diagnostic rule; the 5-to-14-day window is the onset the HIT chapter describes, which characterises the fall qualitatively as unexplained and steady rather than by any percentage. Together they are the timing signature of immune HIT. Rapid-onset HIT breaks the rule — with heparin exposure inside the previous 100 days, counts can drop within 12 hours of re-exposure.

This combination names an emergency: it points to DIC, TTP, HUS, sepsis or autoimmune disease. The workup is LDH, bilirubin and reticulocyte count — and in TTP, waiting for the classic pentad is fatal, since it appears in fewer than 5% of patients.

"HIT causes an extremely hypercoagulable state, where up to 50% of patients develop thromboembolic complications, associated with a mortality rate of up to 30%." Risk is highest in the first 10 days, but the prothrombotic state "persists up to 30 days after stopping heparin" — which is why isolated HIT without thrombosis still earns about a month of anticoagulation.

The feared complication of ITP — about 0.5% in newly diagnosed children and under 1% in chronic childhood disease, with "most ICH cases occur at platelet levels less than 10,000/μL." Named risk factors are extremely low counts, head trauma, antiplatelet medication use, and severe bleeding. Head trauma at a count below 10,000/μL is the dominant risk factor and is treated as an emergency even if the patient looks well.

"When warfarin is first initiated, the natural anticoagulants, protein C and S, whose synthesis is vitamin K-dependent, will be depleted first, while the vitamin-K-dependent clotting factors remain in circulation, leading to a hypercoagulable state." Started during acute HIT, "protein C and S depletion can severely worsen coagulation and increase the risk of thromboembolic complications, particularly skin necrosis." If warfarin was already running, it is held and vitamin K given to replete protein C and S stores.

The classic pentad appears in fewer than 5% of patients, so waiting for fever, anemia, thrombocytopenia, renal and neurologic dysfunction together is fatal. Untreated mortality is "about 90%." The mechanism is ADAMTS13 deficiency letting VWF multimers accumulate and aggregate platelets. Treatment is urgent therapeutic plasma exchange, and when TTP and HUS overlap, "it is better to place the patient initially on plasma exchange" because TTP carries the higher immediate mortality.

Reduced functional white cells. In a neutropenic patient this is not a symptom to monitor — a single oral reading of 38.3 °C, or 38.0 °C sustained for an hour, with an ANC below 500 — or expected to fall below 500 within 48 hours — meets the febrile-neutropenia definition and starts a one-hour antibiotic clock.

CNS and extramedullary involvement in ALL. A mediastinal mass can produce superior vena cava syndrome — facial and upper-limb swelling with distended neck veins — which is an oncologic emergency.

Leukostasis — hyperleukocytosis making the blood too viscous to perfuse the microcirculation of the brain and lungs. It is an oncologic emergency.

DIC, which is "common in AML" and definitional in acute promyelocytic leukemia, where the leukemic cells themselves drive the coagulopathy. APL presents with a "bleeding diathesis with increased coagulation parameters (elevated PT, aPTT) and low fibrinogen."

Differentiation syndrome — a treatment-caused emergency in APL that looks like fluid overload plus fever. It "can mimic sepsis, resulting in delaying the treatment with dexamethasone," and it can appear from "48 hours of ATRA initiation to even 3 weeks from starting therapy."

Fever alone is the emergency — antibiotics are given "within 1 hour after triage," and cultures must not delay them. Most patients "recover rapidly without serious complications. However, it remains life-threatening" and can progress to shock and death. Risk continues through count recovery: neutropenic fever remains a hazard during white-cell recovery, which can take up to 28 days after induction. Empiric therapy must cover Pseudomonas, and gram-positive organisms are now the most commonly documented pathogens.

Precipitated by starting cytotoxic therapy in a patient with a high blast burden, and occasionally arising spontaneously before treatment. Patients "need aggressive hydration, frequent lab monitoring, and management of hyperuricemia with allopurinol and rasburicase," and the baseline chemistry panel exists to make it recognizable. Management detail lives on the oncologic emergencies page — this page names the mechanism and the baseline labs, and hands off.

In APL the coagulopathy is definitional — the leukemic cells themselves drive it — and it is why ATRA is started "when APL is suspected rather than awaiting confirmatory tests with FISH." Starting ATRA then risks differentiation syndrome, a treatment-caused emergency presenting as unexplained fever, weight gain, edema, dyspnea and effusions, for which intravenous dexamethasone is started immediately. See the DIC page for the coagulopathy itself.

Sporadic Burkitt "involves the abdomen and presents most often with massive ascites"; "BL should be approached as an oncologic emergency due to a high proliferation rate of the tumor," and it "may present with tumor lysis syndrome."

"Severe reactions typically occurred during the first infusion with time to onset of 30–120 minutes." Signs include "urticaria, hypotension, angioedema, hypoxia, bronchospasm." "Discontinue RITUXAN infusion for severe reactions and provide medical treatment for Grade 3 or 4 infusion-related reactions." The boxed warning also covers severe mucocutaneous reactions, hepatitis B reactivation and progressive multifocal leukoencephalopathy.

The rituximab label: tumor lysis, "sometimes fatal, can occur within 12–24 hours after the first infusion of RITUXAN in patients with NHL." Prevention and treatment: "alkaline hydration, allopurinol, and rasburicase." See oncologic emergencies.

Severe hypercalcemia — one of the "acute issues that require immediate stabilization."

Possible spinal cord compression from vertebral fracture or plasmacytoma — "a medical emergency."

Excess M protein thickens the blood. "This is considered an emergency, and plasmapheresis should be initiated immediately."

The patient-level cue on NCI’s list is "Weakness of the arms or legs." See oncologic emergencies.

"This is considered an emergency, and plasmapheresis should be initiated immediately to relieve symptoms promptly." Plasmapheresis removes the excess protein but "does not keep new antibodies from forming."

"Vigorous saline hydration, an integral part of hypercalcemia therapy, should be initiated promptly." "Loop diuretics should not be used until the patient is adequately rehydrated," and overhydration must be avoided in heart failure.

With dexamethasone it significantly increases the risk of DVT, pulmonary embolism, myocardial infarction and stroke. "Advise patients to seek immediate medical care if they develop symptoms such as shortness of breath, chest pain, or arm or leg swelling."

Possible intracranial hemorrhage — NHS: "Call 999 or go to A&E." StatPearls: it "requires immediate treatment without delay for confirmatory testing."

On the NHS haemophilia 999 list. "If possible, treat any bleeding straight away with your usual medicines before going to A&E." "Do not drive to A&E."

StatPearls (hemophilia B) teaches these as "signs of life-threatening hemorrhage" — intracranial or retropharyngeal bleeding threatening "airway compromise, or death."

On the NHS VWD A&E list.

CDC: bleeding in the brain "can cause long term problems, such as seizures and paralysis," and death "if the bleeding cannot be stopped or if it occurs in a vital organ such as the brain."

DVT or pulmonary embolism from hyperviscosity. NHS: "Seek medical help immediately if you or someone you’re with shows signs of DVT or a pulmonary embolism."

Arterial thrombosis. NHS: "Seek emergency medical help if you think that you or someone you’re with is having a heart attack or stroke."

Higher-risk groups are defined differently by source: StatPearls — "60 years of age or older and/or who have a history of thrombosis"; NCI (patient) — "older than 65 years or who have a history of blood clots."

Contraindicated with "Existence of, or history of severe psychiatric disorders, particularly severe depression, suicidal ideation, or suicide attempt." See the depression page for suicide-risk assessment.

Acute hemolytic reaction — complement-mediated destruction of donor red cells; onset usually within the first hour.

Anaphylaxis. "The presence of hypotension or respiratory distress should alert the clinician to the possibility of anaphylaxis."

Suspect acute hemolysis or bacterial contamination (septic reaction).

TACO — cardiogenic pulmonary edema from volume overload.

TRALI — noncardiogenic pulmonary edema from donor antibodies.

Venous air embolism — place the patient immediately on the left side, head down.

Hyperhemolysis — "A severe form of DHTR" in which "Affected patients will have hemoglobin lower than their pretransfusion hemoglobin." StatPearls: "A hyperhemolytic crisis is potentially fatal if not treated rapidly."

Stop the transfusion immediately, keep the IV line open with 0.9% saline, maintain urine output and monitor renal function, give oxygen as needed.

StatPearls reports mortality of about 10% (Blood Transfusion chapter) and more than 12% once diagnosed (TRALI chapter); most other cases resolve within 96 hours with supportive care.

Histamine-driven vasodilation and capillary leak in the skin — present in ~90% of patients, usually among the earliest cues.

The same capillary leak pouring into deeper tissue. Perioral and tongue swelling sit next to the airway — treat as an airway threat, not a skin finding.

Laryngeal edema narrowing the upper airway. Once swelling starts, every minute of delay makes intubation harder — "obtaining a definitive airway is imperative."

Leukotriene-, prostaglandin-D- and PAF-mediated bronchoconstriction on top of upper-airway angioedema.

Bronchospasm below plus a narrowing airway above — the reason high-flow oxygen goes on early.

Vasodilation plus capillary leak empties the central circulation: distributive shock. This threshold is itself a diagnostic criterion (WAO 2020).

The heart races to compensate for a vascular compartment that has dilated and leaked its volume away.

End-organ hypoperfusion — the brain and sphincters losing pressure. These count as end-organ dysfunction in the diagnostic criteria.

Mediator effects on the gut. Persistent GI symptoms are one of the organ systems that satisfy the diagnostic criteria — not an innocent bystander.

The end of the distributive spiral: the empty circulation can no longer perfuse the brain.

The biphasic reaction (up to 20% of cases, peaking 8–11 hours after the first): recruited late-phase cells re-ignite the response.

"Obtaining a definitive airway is imperative": every minute of delay lets swelling progress, reducing the chance of successful intubation and raising the risk of a surgical airway. Voice change, throat tightness or stridor is a call-anesthesia-now cue, not a watch-and-wait one.

This number is the entire argument for epi first, fast: IM epinephrine on recognition, supine with legs elevated, wide-bore IV access, and a 1–2 L (or 10–20 mL/kg) isotonic crystalloid bolus for hypotension. Delay — including delay spent giving antihistamines — is the modifiable risk.

Escalates to IV epinephrine (initial 0.1 mg of 1:10,000 over 5–10 minutes, then an infusion from 1 µg/min titrated to effect) and ICU-level care. A patient on beta-blockers who responds poorly may receive glucagon, which bypasses the blocked beta receptor. Anticipate the escalation — don’t keep repeating what isn’t working.

The reason discharge is not the end of care: observe in the ED for at least 4 hours — longer after severe reactions or those needing multiple epinephrine doses (WAO 2020) — and send every patient home warned that returning symptoms mean emergency care immediately.

The classic late presentation, with "a more indolent and subtle onset of symptoms … over several weeks": dyspnea in 95%, dry cough in 95%, low-grade fever in over 80%. Hypoxemia is already present at diagnosis, and 10% to 20% of patients with PJP die — escalate before the hypoxemia becomes severe.

CMV retinitis usually occurs below CD4 50 cells/µL; the retina shows full-thickness intraretinal opacification with hemorrhages, minimal anterior-chamber reaction and a clear vitreous. Vision is lost to macular or optic-nerve involvement, retinal detachment, and immune-recovery uveitis, and delay risks "irreversible damage to vision" — the source calls for immediate ophthalmological evaluation.

These are organisms a competent immune system contains — the infection is the immune failure made visible. Prophylaxis is prescribed by CD4 threshold and stopped by CD4 recovery (Pneumocystis prophylaxis is discontinued once CD4 exceeds 200 for 3 or more months on ART). A new fever, cough, headache, visual change or swallowing difficulty in a patient below 200 is escalated, not observed.

10% to 20% of patients with PJP will die, and mortality reaches as high as 84% once mechanical ventilation is required. That gradient is the argument for escalating on the dry cough rather than on the desaturation. Per the NIH/HHS opportunistic-infection guideline, TMP-SMX "is the treatment of choice for PCP" and "The recommended duration of therapy for PCP (irrespective of regimen) is 21 days," with adjunctive corticosteroids when the room-air PaO₂ is < 70 mm Hg or the A–a gradient is ≥ 35 mm Hg.

Thrombosis occurs in more than 10% of patients, and antiphospholipid antibodies — anticardiolipin, β2-glycoprotein-1, lupus anticoagulant — are "associated with both arterial and venous clots." In a young patient with lupus, a clot is a disease manifestation rather than an unlucky coincidence.

Neuropsychiatric lupus spans cognitive dysfunction and seizures through chorea, acute confusional states, aseptic meningitis, demyelinating disease and transverse myelitis, with psychiatric presentations "from depression and anxiety to frank psychosis." Inflammatory CNS disease is treated with high-dose pulse corticosteroids — this is an escalate-now finding.

Cardiovascular disease "accounts for about half of deaths in Western cohorts" and is explicitly "further exacerbated by glucocorticoid therapy" as well as by traditional risk factors — which is why steroid-sparing is a survival strategy, not a comfort measure. The clinical consequence: chest pain in a young woman with lupus is not automatically costochondritis. Blood pressure, lipids, weight and smoking status belong in every visit.

Mycobacterial and fungal opportunistic infections occur alongside ordinary ones. The clinical rule that follows: fever in a lupus patient on immunosuppressants is infection until proven otherwise — and because a flare produces the same fever, fatigue and malaise, the two cannot be distinguished at the bedside. Report it rather than treating it as a flare.

This is fulminant disease, not improvement. Fulminant C. difficile is "diarrhea, diffuse abdominal pain, abdominal distension, hypovolemia, toxic megacolon, and perforated bowel with peritonitis" — the colon has stopped moving because it is failing. Stool output that drops while the belly grows is an emergency.

These are the necrotizing-infection cues — "dusky or erythematous skin, peri-incisional edema, crepitus, ecchymosis, hypovascularity, blistering, or frank tissue necrosis" — alongside blackish-gray tissue and signs of ischemia. Disproportionate pain is the earliest of them and the one a patient reports before anything is visible.

Ventilator-associated pneumonia, developing more than 48 hours after intubation — biofilm on the tube dislodged into the lower airway, compounded by aspiration in a supine, sedated patient. VAP carries the highest attributable ICU mortality of the major healthcare-associated infections at 29.3%.

Organisms track the external catheter surface within 7 to 10 days and reach the hub from provider hands after day 10, so a bloodstream infection can be seeded by accessing the line. CLABSI carries 23.6% attributable ICU mortality and is associated with over 28,000 deaths a year.

Management escalates beyond oral therapy: in fulminant disease a rectal vancomycin enema "can be administered," and "adjunctive therapy with intravenous metronidazole 500 mg every 8 hours is recommended," with subtotal colectomy "for patients with fulminant colitis, particularly those at risk of complications such as toxic megacolon, intestinal perforation, and necrotizing colitis." The bedside trap is reading decreased stool frequency as recovery. A distending abdomen with less diarrhea in a patient with C. difficile is deterioration, and it is a surgical emergency.

Disproportionate pain arrives before the visible signs, which is why the patient’s report outranks the appearance of the dressing. Superficial incisional infections make up over half of all surgical site infections, but deep incisional and organ/space infections can look unremarkable at the skin while the patient deteriorates systemically — fever, chills, night sweats and leukocytosis with a left shift.

These are deaths attributable to the infection itself, over and above the illness that brought the patient in — and 65% to 70% of CLABSIs and CAUTIs and 55% of VAPs and SSIs are preventable. That combination is the whole moral case for the bundles: this is avoidable mortality, produced by care, and the interventions that prevent it are nursing interventions.

Label: "Observe patients receiving PROGRAF injection for signs and symptoms of anaphylaxis."

Possible renal vein thrombosis — "associated with a high risk of graft loss." "Ultrasound is often diagnostic and should be ordered in the event of a precipitous decline in UOP in a previously functioning allograft."

"The most severe neurotoxicities include posterior reversible encephalopathy syndrome (PRES), which is characterized by headache, seizures, visual disturbances, and confusion." "These effects often correlate with elevated tacrolimus whole blood trough levels."

DiGeorge — hypoparathyroidism "manifests as hypocalcemia of variable severity, ranging from neonatal seizures and tetany to subclinical hypocalcemia."

For transfusion, give "IgA poor or washed red cells"; StatPearls suggests IgA-depleted IVIG or subcutaneous immunoglobulin in IgA deficiency. See the anaphylaxis page.

The early cue of scleroderma renal crisis. NIAMS: "If your blood pressure is higher than usual, call your doctor right away."

Scleroderma renal crisis — "Once the diagnosis of scleroderma renal crisis is made, the patient should be hospitalized, and ACEI therapy started." It can also present without hypertension, with a rising creatinine.

Survival figures differ by source: StatPearls (SSc) — 1-year survival rose from "less than 15%" to "over 85%" with ACE inhibitors; StatPearls (renal crisis) — "85% survival at 1 year and 65% survival at 5 years." "Up to two-thirds of patients with scleroderma renal crisis may require renal replacement therapy."

An open fracture — the fracture hematoma is exposed to the environment. Any fracture with a wound over it is open until proven otherwise; infection risk starts climbing immediately.

Ischemic muscle screams louder than any fracture. The earliest compartment-syndrome cue — expected fracture pain settles with splinting and analgesia; compartment pain climbs through it.

Stretching ischemic muscle within the pressurized compartment reproduces the pain — early on, pain "may only be present with passive stretching." The most sensitive bedside test the nurse has.

The swollen muscle is pressing against fascia that cannot stretch — an early physical sign that pressure is climbing.

The patient-facing version of "out of proportion": after casting or splinting, numbness or tingling, pale skin, or increasing pain and swelling "should be evaluated immediately."

The late Ps: nerve and muscle are already infarcting and arterial inflow is failing. A palpable pulse does not exclude compartment syndrome — capillaries fail long before the artery does. (The classic 5 Ps add poikilothermia to make 6; sources caution the supporting data are weak.)

Marrow fat seeding the pulmonary and cerebral microcirculation — the respiratory and neurologic arms of the FES triad. Agitation and altered mental status without head injury count as cerebral involvement.

The third arm of the FES triad — appears within ~36 hours and fades within a week, so it must be actively sought, especially in dark-skinned patients (look at the upper chest and axillae).

The nurse’s response is immediate: remove or loosen restrictive casts, dressings, or bandages, keep the extremity at the level of the heart — not elevated — "to prevent hypo-perfusion," give supplemental oxygen, prevent hypotension, and get the surgeon: fasciotomy is the definitive treatment. Timing is everything — within 6 h, almost 100% recover limb function; at 6–12 h, about two-thirds; after 12 h, only 8% regain normal function, and fasciotomy is not recommended after 36 h — the damage is irreversible. Delayed fasciotomy carries twice the amputation rate and three times the mortality.

There is no specific therapy — care is supportive (oxygen, mechanical ventilation if needed, hemodynamic support, DVT prophylaxis, hydration and nutrition); mortality is ~7–10%, driven by ARDS and cerebral edema. The real intervention is prevention: early fixation of long-bone fractures within 24 hours — FES is more common with non-operative management.

Monitor for bleeding and shock in every femur fracture: trending vital signs, thigh swelling, and perfusion. Traction splinting stabilizes the fracture, may tamponade bleeding, and significantly reduces pain.

These are the sourced red flags that take the workup out of simple osteoporosis and into investigation for neoplastic causes, particularly multiple myeloma. Serum protein electrophoresis with light chains belongs in the workup, and MRI distinguishes an osteoporotic from a malignant fracture by marrow signal and soft-tissue extension.

The senile pattern: cortical-predominant loss at a femoral neck that is 30:70 trabecular to cortical. Lifetime hip fracture risk for women aged 50 and over is 17.5%, and 75% of hip fractures occur in women. A fracture from a fall that should not have broken anything is by definition a fragility fracture.

The prodrome of an atypical femoral fracture, which usually appears after more than 7 years of treatment: "initial symptoms are dull aching pain in the groin." The action is to discontinue immediately, because continuing therapy risks a contralateral fracture. This is the symptom patients must be taught to report before it becomes a completed fracture.

The first fracture is the heralding cue for the second: prior fracture roughly doubles future risk with the highest hazard in the first 2 years, and an existing vertebral fracture multiplies it five-fold. A 65-year-old with one vertebral fracture has a 1 in 4 chance of another within 5 years, halved to 1 in 8 by treatment. A hip or vertebral fracture is itself an indication to treat, regardless of the DXA T-score.

Synovial thickening rather than an acute purulent process. This is the finding most often taught wrongly. A joint that is hot, red and exquisitely tender is not a rheumatoid flare — in an immunosuppressed patient it is septic arthritis until proven otherwise, and a synovial white cell count above 25,000/mm³ is rare in rheumatoid arthritis and demands an infection workup.

The Vaughan-Jackson deformity — extensor tendon rupture involving the 3rd, 4th and 5th digits — is "considered a surgical emergency." Tenosynovitis has worn the tendons through against eroded bone. This is reported immediately, not at the next clinic visit.

Two possibilities that present identically and both matter: interstitial lung disease, affecting 5% to 16% of patients and "associated with RA-specific autoantibodies and increased mortality"; or methotrexate-induced interstitial pneumonitis, which the drug chapter lists among its life-threatening adverse effects. Either way this is evaluated, not observed.

Cervical instability from atlantoaxial subluxation — chronic inflammation causes "laxity and stretching of the transverse ligament… and erosion of the bony structures." Symptoms range through pyramidal signs and myelopathy, lower cranial nerve palsies, respiratory failure, vertebral artery dissection, quadriplegia, and death. This is also the pre-procedure safety question, because neck positioning for intubation can injure an unstable cervical spine.

The cardiac picture extends beyond coronary disease to heart failure "in the absence of a history of ischemic heart disease," and to arrhythmia, which is "an important cause of sudden death in RA patients." Interstitial lung disease is associated with ACPA positivity and with increased mortality. A new dry cough or breathlessness in an RA patient on methotrexate has two serious explanations — the disease and the drug — and neither is observed.

The earliest warning is in the mouth: "mucosal ulceration… may be a sign of impending methotrexate toxicity." Mouth sores are a signal, not a nuisance. Monitoring is CBC, serum creatinine and transaminases weekly for the first 4 weeks, then at least bimonthly. Rescue exists and is worth knowing: leucovorin rescues normal cells, and a single glucarpidase dose "reduces plasma methotrexate concentrations by 97% or more within 15 minutes."

All agents are held during serious active infection and resumed "after the infection has resolved and antimicrobial treatment has been completed." Other class signals to monitor: neutropenia with IL-6 inhibitors, JAK inhibitors and rituximab; raised liver enzymes and cholesterol with IL-6 and JAK inhibitors; thrombosis and a cardiovascular boxed warning with JAK inhibitors; heart failure and demyelinating disease with TNF inhibitors, which are avoided in congestive heart failure and in untreated active hepatitis C.

This is not osteoarthritis. Osteoarthritis effusions are non-inflammatory and the laboratory studies are normal. The alternatives are septic arthritis and crystal arthropathy — and in a patient whose joint is a prosthesis, prosthetic joint infection, which runs at 1% to 2%.

Dislocation occurs in 1% to 3% of hip arthroplasties and about 70% of those occur within the first month. Note what is deliberately not stated here: no fetched source prints the classic limb-position sign list, so the timing and the incidence are what the page teaches.

The reason this outranks everything else on the list is that osteoarthritis itself never produces this picture — its effusions are non-inflammatory and its laboratory studies are normal, so a hot joint with fever always means a different diagnosis. Note the upstream consequence as well: active infection anywhere is a contraindication to the operation in the first place, since active infection at the joint or anywhere else in the body contraindicates the operation. That is also why an infection anywhere in a patient who already has a prosthesis is treated with more urgency than the same infection in a patient who does not.

What is deliberately absent here is the classic sign list. No fetched source prints "shortened, externally rotated limb with inability to bear weight," so this page teaches the timing, the incidence and the cue that sudden pain with loss of function after hip arthroplasty is an emergency. The posterior approach remains "the most common approach for primary and revision total hip arthroplasty" because it preserves the abductors and gives excellent exposure, and its higher historical dislocation rate "remains inconclusive and controversial" when soft tissue repair is optimal. Direct anterior is increasingly popular with a theoretically lower dislocation risk, but carries a steep learning curve of more than 100 procedures, more wound complications in patients with obesity, and femoral nerve injury risk.

The prophylaxis recommendations come from the American Society of Hematology 2019 guideline, as stated in its published abstract: after total hip or knee arthroplasty, aspirin or an anticoagulant (conditional) and a direct oral anticoagulant over low-molecular-weight heparin (conditional). The orthopedic literature agrees that "many surgeons use aspirin, which has demonstrated suitable efficacy and outcomes equivalent to those of other agents for preventing symptomatic pulmonary embolism." Two things are deliberately not stated: a duration in days, because no permitted source here gives an orthopedic-specific duration, and any attribution to AAOS or ACCP, because neither guideline text was obtainable and the AAOS lineage dates to 2011 to 2012.

On the hip, where this page can cite its figures, periprosthetic fracture runs at 0.4% acetabular and up to 5% femoral, with aseptic loosening requiring revision in persistent cases. The knee has its own complication profile — nerve injury patterns, periprosthetic fracture rates and late mechanical syndromes — and this page does not print those figures, because the chapter carrying them is outside its source list and a hip number must not be relabelled as a knee one. The transferable rule is the check itself: assess motor function, sensation and perfusion on a schedule after any arthroplasty.

This is the most dangerous finding on the page, because it is the one that makes gout indistinguishable from infection. "Acute gouty arthritis may be associated with FEVER AND LEUKOCYTOSIS, making it DIFFICULT TO DIFFERENTIATE FROM SEPTIC ARTHRITIS," and "signs of inflammation may extend BEYOND THE JOINT involved, giving the impression of CELLULITIS with erythema and desquamation. Systemic inflammatory features may include FEVER, MALAISE, AND FATIGUE." In advanced disease "flares may become systemic, occasionally MIMICKING SEPSIS." Fever in a hot joint is a reason to aspirate, not a reason to conclude.

Heralding cues: a first-ever presentation, fever with rigors or systemic toxicity, a joint that does not follow the expected 3-to-14-day course, or any plan to inject a steroid into the joint. The nursing action is to make sure the joint is aspirated with Gram stain and culture sent before an intra-articular glucocorticoid goes in — because injecting steroid into an infected joint is a different and much worse problem than a delayed gout diagnosis.

Infection spreading to nerve roots or the epidural space — an abscess can compress the spinal cord. Report immediately.

Systemic infection and sepsis spreading from the bone.

Signs of a central line–associated bloodstream infection (CLABSI).

About 15% are left with permanent neurologic deficits. New weakness, numbness or bladder or bowel change with back pain is an emergency — neurologic compromise or a large epidural abscess is one of the few surgical indications.

CLABSI and symptomatic DVT are the most common PICC complications (bloodstream infection rate 2.4%, or 2 to 5 per 1000 catheter days). Report fever or redness and soreness around the line.

The start of cauda equina syndrome — with bladder dysfunction, "the time at which the clock starts on diagnosis and management." Present in up to 93%.

Bladder dysfunction occurs in up to 92% of cauda equina syndrome and bowel dysfunction in up to 72%. Painless urinary retention is a late, often irreversible sign.

"Bilateral sciatica, rapidly escalating leg pain, or new bilateral lower-extremity weakness further heighten concern" for cauda equina syndrome.

"Acute or chronic aortic dissection can manifest as tearing back pain."

Urgent MRI (ideally within an hour) and a bladder scan, then "surgical decompression via laminectomy with or without subsequent diskectomy." "Early intervention by surgical decompression … is associated with a better prognosis, particularly when surgery occurs within 48 hours of initial presentation." Deficits can persist — micturition deficits "still presented in 47.7% of patients" at 63 days in one series.

Postoperative hemorrhage; "Serial wound assessments allow for early detection of postoperative bleeding and allow the clinician to perform temporizing maneuvers (digital pressure, dressing reinforcement)."

Report active bleeding immediately. Serial wound checks allow early detection and "temporizing maneuvers (digital pressure, dressing reinforcement)" by the clinician.

Patients "face an increased risk of suicide," and depression is among "the strongest predictors of poor outcomes." Antidepressants used for fibromyalgia carry boxed suicidality warnings; the CYMBALTA Medication Guide says: "In an emergency, call 911."

Families are advised "of the need for close observation and communication with the prescriber." Patients should "report such symptoms immediately to health care providers"; the SAVELLA Medication Guide says to "Call your healthcare provider right away or go to the nearest hospital emergency room." Pregabalin carries a separate (not boxed) warning: "Antiepileptic drugs, including pregabalin, the active ingredient in LYRICA, increase the risk of suicidal thoughts or behavior."

"Monitor patients and adjust dosage as appropriate." Risk is also higher "in the setting of underlying respiratory impairment."

The inhalation-injury cluster. Upper-airway edema is progressive over the first 24–48 h, resuscitation fluids worsen it, and obstruction can be sudden — these cues drive early, preemptive intubation.

The airway is already narrowing — thermal injury above the larynx plus chemical smoke injury below it. Respiratory failure is the leading cause of death from fire injuries.

Carbon monoxide: carboxyhemoglobin binds hemoglobin 200–250× more avidly than oxygen and shifts the dissociation curve left — tissue hypoxia the pulse oximeter cannot see. Headache is the most common symptom; "cherry-red" skin is typically a postmortem finding, not a bedside sign.

Early hyperkalemia — burned and crushed cells dump intracellular potassium. The ECG ladder runs peaked T waves (K⁺ 5.5–6.5) → lost P waves → widened QRS → sine wave/asystole.

Rhabdomyolysis: current destroys muscle along deep bone paths, releasing myoglobin (dipstick positive for "blood" with no RBCs on microscopy) that obstructs renal tubules — pigment-induced acute kidney injury unless flushed with aggressive fluids.

Compartment syndrome: inelastic eschar plus tissue edema strangles the limb — the "Ps." A circumferential full-thickness chest burn restricts ventilation the same way. Anticipate escharotomy.

Curling ulcer — stress ulceration of gastric/duodenal mucosa from splanchnic hypoperfusion and a failed mucosal barrier; burns > 30% TBSA carry the major risk. These ulcers run deep and can perforate.

This is why intubation is early and preemptive on inhalation-injury cues — facial burns, singed nasal hair, soot, hoarseness, enclosed-space fire — rather than a response to obstruction already underway. Waiting for stridor is waiting too long.

Watch the monitor for the ladder: peaked T waves → lost P waves → widened QRS → sine wave. A related trap: from roughly 24–48 h post-burn onward, succinylcholine can trigger exaggerated potassium release from burned muscle and is dangerous in these patients.

Systemic sepsis cues: organisms from the wound have reached the bloodstream. This is an immediate-care emergency, not a dressing problem.

This is an immediate-care escalation — see the sepsis page for the recognition bundle. The wound is now the source, not the problem.

The dehiscence warning sign, in the source's own words. It indicates superficial separation. Note what is not claimed: the source does not specify serosanguineous drainage, so the increase is the finding rather than the colour, and a dressing needing changing more often than yesterday counts.

"A partial or total separation of previously approximated wound edges." Mortality reaches 16%. It is also written into the NHSN deep incisional SSI criterion, so spontaneous dehiscence is simultaneously a complication and a reportable infection event.

"A complication of complete wound dehiscence, where intraabdominal organs herniate through the open wound." It is a surgical emergency whose definitive management is reduction in the operating room, so the bedside action is to cover and call, never to replace.

Systemic signs (fever, significant erythema, cellulitis): require systemic antibiotics and blood cultures. This is the point at which a local wound problem becomes a systemic one — the sepsis page owns the recognition criteria and the bundle.

Report dehiscence immediately; manage superficial dehiscence with an abdominal binder to reduce wound strain; treat deep fascial dehiscence as a surgical emergency for the operating room — the patient "should undergo hemodynamic stabilization." For evisceration, cover with a sterile saline dressing (warm saline-moistened gauze) and prepare the patient for emergent surgery — the organs are reduced in the operating room, not at the bedside. What is deliberately absent is a position. The classic instruction of low Fowler's with knees bent appears in no source fetched for this page, so it is not taught here; the sourced tension-reducing measure is the abdominal binder. Triggers are anything that raises intra-abdominal pressure — coughing, vomiting, straining — which is the sourced rationale for splinting an incision when coughing.

Depth is what the classification is for, and it is why the classification matters at the bedside rather than only in a surveillance report: an infection confined to skin and subcutaneous tissue is a different problem from one that has reached fascia, muscle or an organ space, and the deeper it sits the less likely it is to be managed where the patient is lying. The management pathways that follow from depth, and the separate problem of infected implanted material, belong to the surgical and infection-control services rather than to this page. What the nurse contributes is the finding that establishes depth in the first place — purulence, an incision that opens on its own, or systemic signs on top of a local picture.

The sepsis page owns the recognition criteria and the bundle; this page's contribution is the local cue that converts a wound review into blood cultures and systemic therapy. What makes the transition more likely is everything in the impairment list, and in particular a bacterial burden the wound cannot clear, which is where colonization becomes infection and healing stops. Worth noting for prioritization: a superficial incisional SSI that is drained at the bedside and a wound with spreading cellulitis and fever are the same diagnosis at two very different urgencies, and the discriminator is systemic involvement rather than the appearance of the incision.

"Constitutional symptoms… reflecting systemic involvement in moderate to severe cases." Two or more systemic inflammatory response criteria is the sourced admission threshold, so these findings move the patient from an outpatient to an inpatient problem.

The single most important finding on this page. "Suspicion should be high for necrotizing fasciitis in intense pain." The infection is destroying fascia beneath skin that has not changed yet, so the pain is reporting damage the examination cannot see.

The most useful bedside sign after the pain, because it maps the fascial spread directly. The red edge shows where the skin is involved; the tenderness shows where the fascia is. When the second is larger than the first, the infection is travelling underneath.

Subcutaneous gas from gas-forming organisms in polymicrobial type I infection. It is a classic Fournier feature, and ultrasound detection of subcutaneous gas is described as a pathognomonic finding. It is never a reason to order more tests before calling a surgeon.

A cellulitis that stops hurting where it used to hurt is not improving. The fascial destruction takes out cutaneous nerves, producing "dysesthesia or paresthesia" and then "anesthesia… in some areas." This is the most counterintuitive deterioration sign in the whole disorder.

The sourced evolution of necrotizing fasciitis skin changes. By the time the skin looks like this the diagnosis has usually been available for a while through pain and tenderness — which is the argument for acting on the earlier findings rather than waiting for the appearance to confirm them.

Fournier gangrene, whose early signs — itching, tenderness, edema, erythema — are easily confused with cellulitis. Mortality is about 40% despite modern treatment, and delays beyond 12 hours significantly increase it.

Toxic shock syndrome — "an acute-onset illness characterized by fever, hypotension, sunburn-like rash, and end-organ damage," classically "a diffuse, blanching, macular erythroderma" that typically desquamates one to two weeks later, with renal, hepatic and coagulation involvement.

Surgery is the treatment, quoted without hedging: "the treatment of necrotizing fasciitis is surgery, and no time should be wasted calling for a surgical consult. The earlier the surgery is undertaken, the better the outcome." It requires "extensive, wide debridement of all necrotic tissues," after which "the wounds must be left open and packed with wet gauze" with "daily dressing changes… mandatory" — the wound-healing page owns secondary intention and packing. On mortality, the honest answer is a range with a caveat: the source chapter prints "20 to 80%" in one section and "30 to 90%" in another, so no single figure is presented here as the number. Fournier gangrene is better characterized at about 40% despite modern treatment, rising to 88% with delayed diagnosis, and its delays beyond 12 hours significantly increase mortality. Hyperbaric oxygen is "an adjunctive treatment and not a substitute for surgical debridement," with "no evidence that this therapy improves healing or prolongs life for large wounds."

The mechanism is the reason a skin infection can kill in hours: superantigen toxins "bypass the normal pathway for activation of T cells resulting in over-activation of cytokines and inflammatory cells," with organ dysfunction via capillary leak. Management is source control, aggressive fluid resuscitation, and early antibiotics including clindamycin to suppress toxin production, with intravenous immunoglobulin considered for refractory shock based on observational evidence of mortality reduction. Source control comes first, because antibiotics do not drain an abscess or debride a fascia. One deliberate omission: the numbered CDC clinical case definition was not obtained for this page, so the criteria list is not published here — what is stated is the clinical description above.

The sepsis page owns the recognition criteria, the Sepsis-3 definitions, qSOFA and the bundle; this page contributes the local cue — spreading erythema plus systemic inflammatory criteria — and the link. That same two-criteria threshold is the admission trigger for cellulitis, which means the decision to admit and the decision to think about sepsis are made on the same observation. The practical consequence for the bedside is that the systemic screen at every check is not optional: temperature, heart rate, respiratory rate, white cell count and band percentage.

Generalized pustular psoriasis — the NHS says "Call 999 or go to A&E"; StatPearls: pustular and erythrodermic psoriasis "may be life-threatening."

Erythrodermic psoriasis, often after abrupt withdrawal of systemic steroids; the skin loses barrier function, metabolic rate is disturbed, and the extra skin blood flow can push the heart into failure. "may be life-threatening."

Contact urticaria — "While most cases are mild, anaphylactic reactions can occur." Treat as anaphylaxis (see the anaphylaxis page).

Erythroderma impairs the skin barrier, disturbs metabolic rate and increases skin blood flow enough to cause cardiac failure; generalized pustular psoriasis is associated with hypocalcemia. The NHS: "Call 999 or go to A&E" when the skin quickly turns red with pus-filled bumps, especially with a fast heartbeat, fever or shivering. Abrupt withdrawal of systemic steroids is the classic erythrodermic trigger.

Ophthalmic-branch zoster — "HZO is considered an ophthalmologic emergency." NIA: "If you notice blisters on your face, see your doctor right away because this could be an urgent problem. Blisters near or in the eye can cause lasting eye damage and blindness."

StatPearls (HZO): early antivirals within 72 hours are "the most important factor in reducing ocular complications and postherpetic neuralgia"; teach to report "Sudden drop in vision," "Severe ocular pain or redness," or "Flashes, floaters, or visual field defects" immediately.

Keratinocyte death. Lesions "become confluent, progress to vesicles and bullae, and eventually develop into full-thickness necrosis, detachment, and skin sloughing, which often causes severe pain." Skin pain is a red flag.

Detachable epidermis — "epidermal detachment with gentle lateral pressure or traction." Counts toward body surface area; supports but does not prove SJS/TEN.

"Mucosal involvement, including erythema and erosion, occurs in 90% of patients and generally precedes skin eruption by 1 to 3 days. The oropharynx, eye, and genitalia are the most frequently affected mucosal membranes." "painful stomatitis may interfere with oral intake and increase the risk of dehydration."

"Initial ocular involvement is common and can range from acute conjunctivitis, eyelid edema, and erythema to more severe forms, including corneal ulceration." Ocular complications "are among the most common and serious sequelae."

Airway and esophageal mucosa involved — damage to "the lining of the mouth and the airways, which can cause trouble with swallowing and breathing." Assess the need for intubation.

Sepsis — "Infection is the main cause of death." StatPearls (citing SDH): a sudden temperature drop or rapid deterioration are indications for antibiotics.

Mortality figures differ by source — NLM: about 10% for SJS and "up to 50 percent" for TEN; StatPearls: "as high as 34% to 50%."

"Early consultation with an ophthalmologist is essential to prevent long-term ocular sequelae."

Cerebral microvascular involvement and failing autoregulation — a classic pre-seizure warning symptom.

The occipital cortex and retina sit downstream of the same failing cerebral microcirculation — another pre-seizure warning.

Hepatic microvascular injury stretching the liver — a severe feature, a pre-seizure warning, and the HELLP cue even when the BP looks tame.

Vasogenic cerebral edema — the brain announcing the blood–brain barrier is failing.

Pressure high enough to overwhelm cerebral autoregulation; persistent severe-range pressure is the treatment trigger.

Pulmonary edema — leaky pulmonary capillaries plus rising vascular pressure; a severe feature.

The fetus lives downstream of the failing placenta — hypoperfusion shows up as reduced activity.

Placental abruption — a complication of the ischemic, infarct-prone placenta.

During the seizure: turn her onto one side to keep the airway clear, do not restrain, and keep the bed rails elevated and padded; call for help. Establish the airway and give oxygen by face mask at more than 8–10 L/min to treat the hypoxemia of seizure hypoventilation, and suction oral secretions as needed. The lateral decubitus position lowers aspiration risk and improves uterine blood flow by lifting the gravid uterus off the vena cava. About 10% of patients seize again after receiving magnesium; a second 2 g IV magnesium bolus over 3–5 minutes can be given. If seizures persist past 20 minutes or more than 2 occur despite magnesium, lorazepam 4 mg IV over 3–5 minutes is recommended. Magnesium continues 24 hours after delivery or the last seizure, and eclampsia is among the findings that call for expedited delivery after stabilization.

Escalating RUQ pain in a HELLP patient is a report-now finding, not "expected discomfort." Transfusion support: red cells if hemoglobin < 7 g/dL (or ecchymosis, severe hematuria, suspected abruption); platelets for any actively bleeding thrombocytopenic patient.

Bleeding + pain + a rigid or tender uterus = emergent OB evaluation; abruption threatens both patients at once and is on the patient’s report-immediately list for a reason.

New or worsening trouble breathing moves the patient into severe-features territory and changes the delivery-timing calculus — report immediately.

Close monitoring continues after delivery — eclamptic seizures typically occur from labor through 72 hours postpartum, with a large portion within the first 7 to 10 days, often heralded by headache — and discharge teaching must include the warning-sign list (symptoms after delivery mean calling the provider or 911 right away) — the patient who delivered "fine" is still not out of the woods.

The atony picture: an uncontracted myometrium isn’t compressing the spiral arteries, so the placental bed bleeds freely. This finding is the trigger for immediate fundal massage while help is called.

The bedside volume rule: this rate of loss outruns normal lochia and warrants immediate evaluation — soaking a pad in under an hour is hemorrhage until proven otherwise.

The ~20% blood-volume-loss signature. Pregnancy hypervolemia has already absorbed the first liter silently — the climbing pulse is the earliest honest vital sign.

A late sign: overt hypotension means more than 25% of blood volume (≈ ≥ 1,500 mL) is already lost — and BP can run slightly high right after birth, so even a "normal" reading may be a relative fall.

Uterine inversion — the uterus has turned inside-out through the cervix following delivery. The shock is out of scale with the blood you can see.

The classic cue pair for uterine rupture — a trauma-arm catastrophe in which the uterine wall gives way.

Resuscitate alongside the bleeding control, not after it: two large-bore (14–16 G) IVs, crystalloid/colloid fluids, and a massive-transfusion protocol delivering packed RBCs, FFP, platelets, and cryoprecipitate in fixed ratios. Falling urine output is one of the severe-hypovolemia signs to watch.

Second-line uterotonics come with contraindication hooks the nurse screens for: methylergonovine 0.2 mg IM q2–4 h — avoid in hypertension and preeclampsia; carboprost 0.25 mg IM q15–90 min (max 8 doses) — avoid in asthma, and contraindicated with active cardiac, pulmonary, renal, or hepatic disease; misoprostol rectally — give cautiously with cardiovascular disease. Tranexamic acid 1 g IV over 10 minutes within 3 hours of birth blocks fibrin breakdown by plasmin (avoid with active intravascular clotting or a known thromboembolic event in pregnancy). Beyond drugs the ladder climbs: bimanual uterine compression → intrauterine balloon tamponade (Bakri, filled with 250–500 mL normal saline) or gauze packing → curettage for retained products → uterine artery ligation or B-Lynch compression sutures (effective in ~90% of cases) → hysterectomy as the definitive last resort.

GDM raises preeclampsia risk substantially — 18% untreated, falling to 12% with treatment. These are the preeclampsia severe-feature cues, which are owned in full by the preeclampsia page.

Teaching a patient to monitor fetal movements is one of three duties the source names for nurses and diabetes educators, alongside logging blood sugars and recognizing symptoms of concern. It is on the list because reduced movement is actionable — so it is reported, not observed and reassessed later.

Impending shoulder dystocia: the shoulders have failed to negotiate the pelvis. "The most common findings include slow delivery of the fetal head or chin and the turtle sign" — enough to call the team.

The definition of shoulder dystocia itself — "an obstetric emergency that can complicate vaginal delivery." Incidence climbs with weight: about 1% under 4,000 g, 5–9% at 4,000–4,500 g, and 14–23% above 4,500 g.

Neonatal hypoglycemia: "clamping the umbilical cord at birth abruptly terminates this continuous glucose supply," while fetal insulin remains high. These signs are late and nonspecific — which is why the newborn is screened on a clock rather than watched for symptoms.

The same hypoglycemia, further along. The full sourced list also includes seizures, coma, apnea, grunting and tachypnea — the reason the threshold for acting on a low newborn glucose is not a judgement call.

Fetal complications include "brachial plexus injuries, fractures of the clavicle and humerus, fetal hypoxia, and death." Plexus injuries are upper C5-C6 (Erb palsy), lower C8-T1 (Klumpke palsy) or total plexopathies, and children with obstetric plexopathies "have a generally good outcome with conservative management and observation, though some may have permanent impairments." "Maternal complications include third- or fourth-degree tears or postpartum hemorrhage." After one dystocia the mother has "a 6- to 30-fold increased risk of shoulder dystocia recurrence" with any later vaginal delivery, which is why the event is told to her plainly. Symphysis pubis separation and a transient neuralgia are complications linked to the McRoberts maneuver itself.

Presentation ranges from jitteriness, poor suck, weak or high-pitched cry, sweating, hypothermia, irritability and hypotonia through to lethargy, stupor, seizures, apnea and coma. Treatment starts at the breast or bottle, not with a line: increase feeding frequency and give dextrose gel 200 mg/kg massaged into the buccal mucosa; intravenous dextrose is the escalation, and an infant receiving it needs close monitoring with frequent blood glucose checks. The companion neonatal problems from the same mechanism are polycythemia, hyperbilirubinemia, hypocalcemia, hypomagnesemia, respiratory distress syndrome and increased NICU admission.

This is the single best argument the sources supply for treating a condition the patient cannot feel. The preeclampsia page owns the severe-feature list and the magnesium toxicity ladder — cross-link, do not restate them here. One boundary must be held: a GDM diagnosis does not put a patient on low-dose aspirin prophylaxis. ADA 2026 Recommendation 15.23 names type 1 or type 2 diabetes for aspirin 100–150 mg daily from 12 to 16 weeks, and the USPSTF high-risk list likewise names pregestational diabetes. The association is real; the aspirin conclusion is not.

Quoted: "painless vaginal bleeding during the second or third trimester of pregnancy is the usual presentation." The lower segment stretches or the cervix is disturbed, shearing vessels in a placenta that has an exit route for the blood and no muscle wrapped around it.

Bleeding can subside, but "It is not possible to predict if spontaneous bleeding will occur in clients diagnosed with placenta previa." A bleed that stopped is not a bleed that is over — this is why admission, observation and a 48-hour bleed-free interval govern discharge.

"Sudden abdominal pain" is named a warning sign. Blood trapped between placenta and myometrium irritates a muscle that cannot expand to accommodate it, so pain and tenderness arrive with the separation itself.

The irritated myometrium contracts continuously. Named for moderate-to-severe abruption, and it is the bedside finding that separates abruption from previa faster than any test.

"Board-like consistency" is the source's own phrase for severe abruption, and it travels with coagulopathy and fetal death. This is complete or near-complete separation, which "typically results in fetal death unless delivery occurs immediately."

The single most important finding on this page. Abruption bleeding "may be visible or concealed," and "the absence of vaginal bleeding does not eliminate the diagnosis of placental abruption." The blood is inside the uterus. Reassurance from a dry pad is the classic fatal error.

Vital signs lag the blood loss, because compensation holds the systolic pressure up until the late stages of shock. The trend is the finding — tachycardia and a narrowing pulse pressure arrive long before hypotension does.

Late decelerations "reflect transient or chronic uteroplacental insufficiency," and "when associated with true placental insufficiency, interventions are indicated" — in abruption that insufficiency is anatomical, because exchange surface has physically been torn away. The fetus decompensates before the mother's vitals move.

Concerning for fetal anemia, which can result from abruption. It is a reason to have the neonatal team at the bedside prepared for an anemic infant.

On the sourced patient-teaching warning list alongside sudden abdominal pain, bleeding and uterine tenderness, because "educating patients about the warning signs… empowers them to seek immediate evaluation, which can be lifesaving."

The obstetric version of this is stated plainly on the postpartum-hemorrhage page — a pregnant patient can lose more than 1,000 mL before signs of hypovolemia appear — and the shock page explains why: systolic pressure is maintained by compensation until the late stages of shock. The escalation trigger is therefore the trend, not a number: heart rate climbing, pulse pressure narrowing, urine output falling, new anxiety or confusion. The ATLS class ladder that formalizes this belongs to the shock page — follow the link rather than re-deriving it here.

Abruption sits alongside HELLP syndrome and amniotic fluid embolism on the DIC page's own list of obstetric triggers. Heralding cues are oozing from intravenous and venipuncture sites, bleeding gums, a falling fibrinogen and a rising D-dimer. Two management consequences follow. Excessive crystalloid makes it worse — hemostatic resuscitation "pushes for early use of blood products rather than an abundance of crystalloids in order to minimalize the metabolic derangement, resuscitation-induced coagulopathy, and the hemodilution that occurs with crystalloid resuscitation," with balanced blood-product ratios, which the shock page owns. And coagulopathy is a reason vaginal birth may be safer than cesarean in abruption. The lethal triad being worked against is acidosis, hypothermia and coagulopathy — which is why warmed fluids and warmed blood, not just volume, are part of the resuscitation.

Abruption also causes preterm birth and low birth weight, perinatal asphyxia, fetal anemia from fetomaternal hemorrhage, stillbirth and neonatal death — which is why "a neonatal team must be in the delivery room to receive and manage the infant," informed of the abruption specifically so they can anticipate anemia. Previa's neonatal harms are the harms of prematurity: lower birth weight, lower Apgar scores and respiratory distress syndrome. A Category 3 tracing that does not resolve with resuscitative measures in a suspected abruption is therefore a delivery decision, not a monitoring decision — and the reassuring counterweight for previa is that about 90% of cases are managed through to a delivered outcome.

Two figures need their denominators kept straight. The source prints both "10% to 20% of maternal deaths" and "approximately 1% to 5% of maternal deaths annually" in the United States — the second is the one labeled as the US figure, and a US-facing page should use it while noting a higher global figure exists. Placental location also shifts prognosis: "women with anterior placentas have poorer prognostic factors and are more likely to have massive blood loss and higher hysterectomy rates compared to any other location." Vigilance does not end at delivery — postpartum monitoring for hemorrhage and coagulation abnormalities is explicitly part of abruption care, and the 4 Ts framework for postpartum hemorrhage belongs to that page.

The safety rule is do not pull. In a stable patient a scheduled cesarean at about 34 to 35 weeks is planned together with preparation for hysterectomy, "the uterine incision should be made in a manner that would avoid the placenta," and if the placenta does not deliver spontaneously "the current recommendation is to leave the placenta, close the hysterotomy, and perform a hysterectomy." Traction is the harm. "Placenta accreta spectrum can lead to massive hemorrhage, and an integrated team approach is necessary before delivery" — which is why suspected accreta is a planning decision made weeks in advance, not a delivery-room discovery. Delivery by a multidisciplinary team in a center of excellence reduces maternal mortality and morbidity, and delivery of a diagnosed accreta should be scheduled at a level III or IV maternal care facility.

Quoted teaching: patients "should be instructed to present for evaluation if they ever experience leakage of fluid during pregnancy," because rupture of membranes must be ruled out given "the increasing risk of complications associated with a delayed diagnosis." Rupture starts the latency clock and the infection clock together.

Raises decidual hemorrhage and abruption, which is pathway 2. It changes the differential and belongs to the placenta-previa-abruption page's workup.

The diagnosis itself — "Regular contractions with demonstrated cervical change over time," or "Regular contractions and cervical dilation of 3 cm or more." It is an emergency evaluation because the intervention window is measured in hours and the steroid course needs 24 to 48 of them.

Think of cervical insufficiency — a separate etiology of preterm birth, for which "Cerclage placement may be indicated by a history of cervical insufficiency or by certain sonographic or physical exam findings in a current pregnancy." A tocolytic treats the wrong problem.

The intraamniotic infection set: fever, uterine tenderness, foul-smelling discharge and fetal tachycardia (a fetal heart rate above 160 beats/min in the clinical chorioamnionitis criteria). Infection converts expectant management into delivery, and tocolytics carry a higher risk of intrauterine infection before 34 weeks.

Late decelerations and a Category III tracing signal a fetus in trouble — see Placenta Previa & Abruption for fetal heart rate categories. Nonreassuring fetal status is one of the four findings that end expectant management.

Cord prolapse is one of the four contraindications to continuing the pregnancy, and it ends expectant management immediately. It is a mechanical emergency with no medical management.

The timeline in previable rupture is the one that should end any casual framing of expectant management: "the median interval from PPROM to the first signs of infection was 5 days; the median time from infection diagnosis to death was only 18 hours." Composite maternal morbidity ran at 60% with expectant management versus 33% with abortion care, and the Society for Maternal-Fetal Medicine recommends individualized counselling about maternal and fetal risks and offering abortion care in previable and periviable rupture. Established intraamniotic infection is treated with broad intravenous antibiotics and delivery; the specific regimen sits in a chorioamnionitis literature this page does not cite, so no drug names are given here. Neonatal consequences include cerebral palsy, respiratory distress syndrome, bronchopulmonary dysplasia, neonatal sepsis and death; maternal ones add pelvic infection, postpartum hemorrhage and operative delivery.

Learning these as a set is more useful than learning them separately, because expectant management in early preterm rupture "can be considered in the absence of contraindications to ongoing pregnancy," and the whole discipline of the admission is knowing what cancels it. Latency is finite in any case: in ruptured membranes before term, birth within 7 days occurs in "at least 50%" of cases, "although rare, cessation of fluid leakage with restoration of normal amniotic fluid volume and favorable outcomes is possible."

Antenatal corticosteroids "help fetal lung maturity," and in the ALPS trial they "significantly reduced the risk of neonatal respiratory morbidity" — which is the answer to "why delay delivery for 48 hours." Magnesium adds another target, reducing cerebral palsy and severe intraventricular hemorrhage when given within 24 hours of early preterm birth. Transfer is a treatment too: tocolysis buys "additional time to be transferred to a tertiary care center," and "Neonatal and anesthesia teams should also be informed so they can be aware of an upcoming preterm delivery."

Quoted: "ectopic pregnancy often causes lower abdominal pain, typically on one side, along with vaginal bleeding" — tubal distension by a growing gestation in a structure that cannot accommodate it. Any positive pregnancy test with pain needs the pregnancy located.

The endometrial decidua sheds without an intrauterine pregnancy sustaining it. It is frequently read by the patient as a period that came late, which is one reason the diagnosis is missed at home rather than in the clinic.

A late or missed period with one-sided pain and spotting is the early picture: "Ectopic pregnancy often causes lower abdominal pain, typically on one side, along with vaginal bleeding." These are not a triad to check off — treating their incompleteness as reassuring is the error, since "not all ectopic pregnancies have this characteristic presentation."

Free blood in the peritoneum irritates the diaphragm, and diaphragmatic irritation refers to the shoulder. It is a rupture sign, and it is the one that seems unrelated to the abdomen, so it gets attributed to posture or sleeping position unless the patient has been told to expect it.

Blood pooling in the cul-de-sac behind the uterus. This is the symptom patients report and clinicians miss, because it does not sound gynecologic. The source lists it with the rupture-era symptoms: "Additional symptoms can include dizziness, fainting, nausea and vomiting, shoulder pain, urinary symptoms, or rectal pressure."

Peritoneal signs from hemoperitoneum. Combined with a positive pregnancy test, this is a surgical abdomen and the destination is an operating room, not a further round of imaging.

In early hemorrhage the "Pulse pressure begins to narrow, but systolic blood pressure may be unchanged to slightly decreased," and "heart rate and blood pressure responses are extremely variable and, therefore, cannot be relied upon as the sole means of diagnosis." Tachycardia and a narrow pulse pressure come first; hypotension is late. The trend is the finding.

Compensation failing. On the ATLS ladder, a significant blood pressure fall with mental status change and decreased urine output corresponds to a 30% to 40% loss, roughly 1,500 to 2,000 mL. By the time this appears the blood loss is substantial.

A shared finding, not a discriminator. It appears among ectopic rupture findings and it is also part of the minimum criteria for pelvic inflammatory disease, which the stis-pid page carries. A pregnancy test is what separates them.

The mass is still present during medical management, and rupture remains possible. Return precautions are therefore specific: new or worsening pain, shoulder pain, dizziness or faintness, and rectal pressure mean come back immediately.

Ectopic rupture causes an estimated 2.7% of pregnancy-related deaths. The reason the cue list is led by odd symptoms rather than vital signs is that vital signs lag: in early hemorrhage "systolic blood pressure may be unchanged to slightly decreased" while the pulse pressure narrows. Reading the ladder helps — a heart rate of 100 to 120 with a narrowed pulse pressure and a normal systolic corresponds to a 15% to 30% loss, while a significant blood pressure fall with mental status change is already 30% to 40%. The answer to hypotension here is blood and a surgeon, not more crystalloid and not a vasopressor, for which no fetched source gives a role in this setting. Abdominal ectopic pregnancy carries a 10% mortality rate with up to sevenfold higher risk of organ perforation and massive hemorrhage.

These are hospitalization criteria, not merely severity markers. Note the two different fever numbers: 38.3 °C supports the diagnosis; 38.5 °C helps justify admission. Pregnancy and tubo-ovarian abscess are independent admission criteria.

Patients "should demonstrate clinical improvement… <3 days after therapy initiation." Failure to do so means hospitalization, reassessment of the antimicrobial regimen and additional diagnostics — it is a defined deterioration trigger, not a reason to extend the course.

This is an obstetric emergency. "As many as 40% of maternal syphilis patients who receive treatment will develop a Jarisch-Herxheimer reaction," and the sourced instruction is explicit: "continuous fetal heart monitoring for up to 24 hours is suggested" because of the risk of fetal distress and preterm labor. It usually resolves within 24 hours.

Congenital syphilis, though 70% are asymptomatic at birth — so the maternal serology, not the baby's appearance, is the cue. "Significant rhinitis with a constant and intractable nasal discharge" is "often among the earliest clinical presentations," and moth-eaten long-bone lesions are pathognomonic.

The sourced nursing order is explicit, and it is the most testable fact on the syphilis half of this page: "continuous fetal heart monitoring for up to 24 hours is suggested for maternal syphilis patients who develop a Jarisch-Herxheimer reaction." The reaction is the dying organisms, not an allergy, so it is not a reason to withhold or stop penicillin — and withholding penicillin is not an option in pregnancy in any case. In a non-pregnant adult the same reaction is an expected, self-limited event needing supportive care and a warning given in advance. Warn the patient before the first injection, so a febrile reaction at home does not read as anaphylaxis or as treatment failure.

When early signs do appear, the commonest is hepatomegaly with anemia and thrombocytopenia; "significant rhinitis with a constant and intractable nasal discharge" is "often among the earliest clinical presentations"; moth-eaten long-bone lesions are pathognomonic; and the rash affects palms, soles and mucous membranes. Late stigmata include the Hutchinson triad — Hutchinson teeth, interstitial keratitis and sensorineural hearing loss — which is "relatively specific for congenital syphilis," alongside saddle nose, saber shins, frontal bossing and chorioretinitis with potential blindness. Adequate maternal treatment requires completion more than 30 days before delivery, which is why a positive screen at 28 weeks is acted on the same day rather than at the next visit.

The rule that governs it is the same one that governs the rest of the admission: no clinical improvement within 72 hours of outpatient therapy means hospitalization, regimen reassessment and further imaging — and a tubo-ovarian abscess is one of the things that reassessment is looking for.

"Herceptin administration can result in serious and fatal infusion reactions and pulmonary toxicity." "Discontinue Herceptin for anaphylaxis, angioedema, interstitial pneumonitis, or acute respiratory distress syndrome." In pregnancy it can cause oligohydramnios.

The Yaz patient information says "Call your healthcare provider right away" for these — clot, stroke, heart and liver warning signs.

The Medication Guide: "Call your healthcare provider or get emergency medical help right away" — suicidal ideation occurred in the endometriosis trials, including one completed suicide.

Risk "increases with age, particularly in women over 35 years of age, and with the number of cigarettes smoked." Teach the call-right-away signs: leg pain, sudden breathlessness, chest pain, sudden severe headache, weakness or trouble speaking, vision loss, yellowing.

Testicular torsion — "a true urologic emergency"; viability "significantly decreases 6 hours after the onset of symptoms."

Severe cutaneous adverse reactions (SJS/TEN, DRESS, AGEP) "may be life threatening or fatal"; the label: "Advise patients to contact their healthcare provider or seek medical attention right away if they experience signs or symptoms of SCARs." Treatment is interrupted.

"Salvage is possible if the torsion is less than 8 hours, but rare if more than 24 hours have elapsed." Exam signs are unreliable; urology is consulted on presentation.

StatPearls: suicide risk and psychosis "are emergencies and require immediate treatment to minimize the risk to the patient and infant." MedlinePlus: thoughts of suicide "or hurting yourself or your baby get help right away."

Postpartum psychosis — "a psychiatric emergency that requires hospitalization." MedlinePlus: "Call 911 or go to the nearest emergency room right away if this happens."

Sleep deprivation leading to mania marks psychosis risk; the "single most important risk factor" is a first pregnancy with bipolar I history.

Wernicke encephalopathy from thiamine deficiency; "delayed treatment can result in irreversible cognitive impairment, disability, or death."

"A cystoscopy with clot evacuation and irrigation is necessary in more severe cases." "Any antiplatelet or anticoagulation medications the patient takes should be reviewed, and the necessity questioned."

StatPearls (Abortion Complications — bleeding after a pregnancy ends): this "should prompt suspicion for uterine hemorrhage regardless of the patient's apparent hemodynamic status." WHO: "Advise woman to return immediately if she has any of the following danger signs:" — including "increased bleeding."

StatPearls (Abortion Complications): dizziness or syncope "should prompt suspicion for hemorrhage or sepsis"; "Hemorrhage may present subtly." StatPearls: hemodynamic instability and possible ectopic pregnancy "need to be emergently addressed."

Septic abortion — "a medical emergency" (StatPearls, Abortion Complications). NICHD: infection in the uterus "can be life threatening"; women with these symptoms "more than 24 hours after treatment should call 911."

StatPearls: "Alternatively, an adnexal mass finding suggests an ectopic pregnancy rather than an early pregnancy loss"; hemodynamic instability and/or possible ectopic pregnancy "need to be emergently addressed." WHO: two or more of abdominal pain, fainting, pallor or marked weakness point to ectopic pregnancy — "Refer urgently to hospital."

StatPearls: "The first step is to assess hemodynamic stability and provide appropriate emergency resuscitation as needed. Initiate empiric broad-spectrum IV antibiotics and IV fluids as soon as possible." Then "the primary treatment of a septic abortion is the prompt surgical evacuation of the uterus, which is the source of the infection." Monitor for improvement ("decreasing uterine tenderness, afebrile for a minimum of 24 hours").

Severe anemia; NCBI: hydrops "is usually fatal, either in utero or soon after birth." StatPearls: "Hydrops fetalis is commonly identified antenatally on ultrasound imaging with an abnormal fluid collection in 2 or more cavities or compartments."

StatPearls: hydrops "may present with cardiovascular shock due to severe anemia during neonatal evaluation"; it "may require emergent transfusion, pleural effusion, ascites drainage, and stabilization of respiratory distress."

StatPearls: "untreated hemolytic anemia in a neonate will progress from hyperbilirubinemia with jaundice to kernicterus due to unconjugated bilirubin accumulating in the basal ganglia and causing neuronal death"; NCBI calls kernicterus "a potentially fatal condition that leaves permanent neurological damage in the babies that survive."

CDC (archived, 2020): "Get emergency medical help if your baby:" "Is crying inconsolably or with a high pitch." "Is arched like a bow (the head or neck and heels are bent backward and the body forward)." "Has a stiff, limp, or floppy body." "Has strange eye movements." Untreated severe jaundice can cause kernicterus, "a potentially fatal condition" (NCBI).

Fetal treatment: "If a fetal blood test confirms fetal anemia, depending upon its severity, a blood transfusion can be done in utero to replace the lysed fetal RBCs" (NCBI). At birth, "O-type, Rh-negative blood that has been leukodepleted and irradiated should be available at delivery" if immediate transfusion is needed (StatPearls).

NCBI: in the newborn period "there may also be a sharp rise in the level of bilirubin in the neonate, which can be lowered by phototherapy and exchange transfusions." CDC (archived, 2020): "Kernicterus also causes problems with vision and teeth and sometimes can cause intellectual disabilities." "No baby should develop brain damage from untreated jaundice." "Jaundice is generally treated before brain damage is a concern."

CDC: sepsis "is a life-threatening medical emergency." StatPearls (Endometritis): "In addition to fever and tachycardia, signs can include hypotension, hypothermia, altered mental status, and unexplained end-organ dysfunction." Suspect sepsis with end-organ dysfunction and infection "even if fever is not present" (StatPearls, citing SMFM).

StatPearls: "pain out of proportion to examination is a hallmark of necrotizing fasciitis." "Surgery should not be delayed for diagnostic studies, as these infections are rapidly progressive and fatal if not managed promptly."

StatPearls: these "should raise suspicion for infection with GAS, which can cause endomyometritis associated with toxic shock syndrome as well as necrotizing fasciitis."

CDC Hear Her urgent maternal warning signs: "Seek medical care immediately if you experience any signs or symptoms that are listed below." "The symptoms below can be a sign of a life-threatening condition." See postpartum hemorrhage.

StatPearls: "Broad-spectrum antibiotics should be given as soon as possible." "In patients with hemodynamic compromise, balanced crystalloid fluids should be given to a maximum of 30 ml/kg of ideal body weight." "If the mean arterial pressure remains persistently below 65 mmHg despite adequate fluid resuscitation, a vasopressor should be initiated." "Norepinephrine is recommended as the first-line treatment in the postpartum timeframe" (StatPearls, citing SMFM).

StatPearls, citing IDSA: "While awaiting emergent surgical intervention, immediate initiation of broad-spectrum antibiotic therapy remains essential. A frequently recommended regimen includes vancomycin combined with piperacillin-tazobactam and clindamycin, the latter selected for its ability to suppress bacterial toxin production."

Acute angle closure. The full sourced cluster is "unilateral intense periocular pain, redness in the eye, rapid vision loss, systemic symptoms, nausea, headache, multicolored halos around light sources, and vomiting." The systemic symptoms are the trap: "nonophthalmologic practitioners may misinterpret these symptoms as neurological conditions, leading to unnecessary cranial imaging and neurologic consultations before ophthalmologic examinations are conducted."

A specific and highly suggestive symptom, produced by corneal oedema at high pressure — the patient may also describe "steamy" or cloudy vision. It appears on both the clinical and patient-facing symptom lists, and it is the one symptom that points at the eye rather than the head.

The examination signature of an acute attack, alongside "Engorged conjunctival vessels… Marked conjunctival injection… Mild aqueous flare and cells," angle closure on gonioscopy — "Gonioscopy will reveal angle closure for 360 degrees" — and a swollen optic nerve. Note that the pupil is mid-dilated and does not react — not pinpoint, not fully blown.

Malignant glaucoma, the complication of the complication: "a significant increase in IOP characterizes malignant glaucoma DESPITE A PATENT IRIDOTOMY. In this condition, the eye’s anterior chamber becomes FLAT due to a fluid imbalance, leading to further elevation of IOP." Also called aqueous misdirection syndrome or ciliary block glaucoma, it "is challenging to treat and progressively leads to blindness."

Congenital glaucoma presents in infancy with a cloudy, enlarged eye. These are not normal newborn findings, and the enlargement happens because an infant eye is distensible in a way an adult eye is not.

The heralding cue in open-angle disease is that there isn’t one — nothing is felt until roughly 40% of nerve fibres are gone, so the cue is the examination itself. In angle closure, "If AAC goes undetected and untreated in its early stages, it can result in temporary vision loss or blindness," and primary angle-closure glaucoma is "more likely to lead to blindness than primary open-angle glaucoma" despite being far rarer. The one genuinely hopeful sentence is also sourced: "there’s no cure for glaucoma, but early treatment can often stop the damage and protect your vision."

Also named aqueous misdirection syndrome or ciliary block glaucoma, it "is challenging to treat and progressively leads to blindness." The heralding cue is a pressure that rises after a procedure that technically worked — which is exactly when a team is most likely to attribute the symptoms to normal postoperative discomfort.

Possible posterior-circulation stroke. NHS: "Call 999" — "These can be signs of a stroke, which is a medical emergency." StatPearls: stroke "may present as isolated vertigo in 10% to 25% of cases."

NIDCD: "consider sudden deafness symptoms a medical emergency and visit a doctor immediately." NHS grades sudden hearing loss "Urgent advice: Ask for an urgent GP appointment or get help from NHS 111."

"about half of people with SSHL recover some or all their hearing spontaneously, usually within one to two weeks from onset."

Endophthalmitis — "a vision-threatening ophthalmic emergency"; typically "within two weeks after surgery". NEI: "Call your eye doctor right away". Pain can be absent in up to 25%. (The NHS non-urgent list that includes a red or painful eye is scoped here to months-later clouding.)

Retinal detachment — "Symptoms typically include flashing lights, floaters, as well as peripheral vision loss with progression to complete vision loss." NEI "right away" (the NHS routes these to 111).

On the NEI "Call your eye doctor right away" list: "Bad pain that won’t go away even if you take medicine for it".

"Endophthalmitis is one of the most serious ophthalmic emergencies and requires urgent diagnosis and treatment to preserve vision and the structural integrity of the eye." Pain may be absent in up to 25%. Counsel every patient on the warning signs at discharge.

Reported in 0.1% to 1.3% of eyes. NEI says to call right away; the NHS routes these signs to NHS 111. This page follows the more urgent framing.

Retinal detachment — "a medical emergency": go to the eye doctor or emergency room "right away". (NHS routes these to 111.)

Possible conversion to wet AMD: NEI "see your eye doctor right away"; StatPearls "contact their ophthalmologist immediately". (NHS routes vision that "gets suddenly worse" to an urgent optician appointment or NHS 111.)

Endophthalmitis, retinal detachment or retinal vasculitis risk — the labels say to "seek immediate care from an ophthalmologist".

NHS: "Call the hospital or go to A&E if the pain, redness or blurriness gets worse after surgery."

"You can get a detached retina more than once. Get medical help as soon as possible if the symptoms come back."

Getting treatment right away helps protect vision; treatment succeeds in about 9 of 10 people.

Seek immediate ophthalmology care. Pegcetacoplan also raises the rate of wet AMD, so patients are monitored for it.

Amsler grid monitoring and prompt action on new distortion.

Gonococcal or meningococcal. StatPearls: "ophthalmic emergencies with risks of vision loss and death"; "Meningitis and sepsis caused by Neisseria gonorrhoeae or Neisseria meningitides can be life-threatening."

Treatment "Requires both parenteral and topical antibiotic therapy" (CDC). "Severe gonococcal conjunctivitis, meningococcal conjunctivitis, and neonatal conjunctivitis require hospitalization" (StatPearls). For meningococcal cases, "close contacts should receive prophylactic antibiotics."

Possible retinal detachment. NIDDK: "Call a doctor right away if you notice sudden changes to your vision, including flashes of light or many more spots (floaters) than usual. You also should see a doctor right away if it looks like a curtain is pulled over your eyes." These can be signs "of a detached retina , which is a medical emergency."

[AVEGF] Possible endophthalmitis, retinal detachment or retinal vasculitis. Labels: "If the eye becomes red, sensitive to light, painful, or develops a change in vision, advise the patient to seek immediate care from an ophthalmologist" (LUCENTIS); EYLEA gives the same instruction.

Signs such as sudden flashes, many new floaters or a curtain over the vision are "a medical emergency" (NIDDK). "vitrectomy is the treatment of choice in cases presenting with tractional retinal detachment" (StatPearls).

LUCENTIS: "patients should be monitored following the injection to permit early treatment should an infection occur." StatPearls: "After intravitreal injections, patients should be called for follow-up the next day." Contraindications: "EYLEA is contraindicated in patients with ocular or periocular infections"; LUCENTIS carries the same contraindication.

Severe neutropenia mutes every other sign of infection — fever is often the only indication that bacteremia is underway.

Hyperkalemia plus cardiac calcium-phosphate deposits destabilize the rhythm; the phosphate-driven hypocalcemia adds tetany and seizures.

Uric acid crystals obstruct the renal tubules while calcium-phosphate precipitates in the parenchyma — AKI is declaring itself.

Laryngeal edema and cerebral edema are the rare, life-threatening endpoints of the congestion — the airway/brain cues that make SVC an immediate emergency.

The mass is now compressing cord tracts; motor deficits are present in 35–75% at diagnosis, and function at diagnosis predicts function after treatment.

Sphincter and bladder-bowel dysfunction is a late finding — the cauda equina pattern with saddle-region deficits. The window for reversal is nearly closed.

Rising calcium depresses neuronal function; cognition change with calcium above 10.5 mg/dL is the nursing cue set, and confusion marks crisis territory.

The nurse’s moves: continuous ECG in the risk window, labs on the high-risk cadence, restrict K⁺/phosphate intake, and treat hypocalcemia only if symptomatic — IV calcium can worsen the AKI by feeding calcium-phosphate precipitation. Dialysis (CRRT preferred) for refractory hyperkalemia, oliguria, fluid overload, or a calcium-phosphate product ≥ 70 mg²/dL².

Every minute past the 60-minute antibiotic target raises the stakes: door-to-needle time beyond the hour is significantly associated with ICU admission. Cultures first, antibiotics immediately after — never in the reverse order of importance.

Function at diagnosis predicts function after: severe weakness or > 48 hours unable to ambulate before diagnosis predicts a poor outcome. The nurse who reports tonight’s new back pain — instead of charting it for morning rounds — may be the reason the patient walks.

Keep the head of the bed elevated to drop venous pressure, support airway and breathing, and escalate immediately — stridor or falling mental status moves this patient to the front of every queue.

Anticipate isotonic saline at 200–300 mL/h titrated to urine output > 100 mL/h, ECG monitoring for the shortened QT, and antiresorptive therapy. Dialysis when renal failure or heart failure makes hydration impossible.