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Digestive / GI

Hepatic Encephalopathy

HE High-yield Verified · Sep 2026

Hepatic encephalopathy is a spectrum of neuropsychiatric abnormalities caused by neurotoxic substances that accumulate in the blood of patients with liver dysfunction or portosystemic shunting; it is a diagnosis of exclusion.

Early hepatic encephalopathy looks like day–night reversal and a shorter attention span; later come asterixis, disorientation, somnolence and coma. Most episodes have a precipitant, and removing it can be enough. Lactulose is titrated to 2 or 3 soft stools daily, rifaximin is added to prevent recurrence, protein is not restricted, and sedatives are avoided.

What’s going wrong in the body

The normal physiology, where it fails, and why the body’s compensation backfires.

01 Gut ammonia that the liver no longer clears

"Colonic bacteria and mucosal enzymes break down dietary proteins, releasing ammonia in the gastrointestinal tract. This ammonia is normally absorbed into the portal circulation, where the liver converts it into urea through the urea cycle. However, in cases of hepatic failure or systemic shunting, ammonia can accumulate and bypass the liver, entering the systemic circulation." Normally, "ammonia is converted to urea in the liver and then subsequently cleared by kidneys. A small amount is also cleared by skeletal muscle via glutamate" (Patidar & Bajaj).

Two routes around the liver. "Symptoms may result from liver insufficiency or the diversion of blood flow away from the liver (portosystemic shunting)." A transjugular intrahepatic portosystemic shunt (TIPS) is one such route: "hepatic encephalopathy can complicate 30% to 50% of cirrhosis patients who undergo TIPS" (StatPearls).

Muscle matters. "A small amount is also cleared by skeletal muscle via glutamate" (Patidar & Bajaj), and sarcopenia — "decreased muscle mass, strength, and function" — "is associated with an increased risk of hepatic encephalopathy" (StatPearls).

Ammonia made in the gut normally becomes urea in the liver; cirrhosis, a failing liver or a shunt lets it reach the brain.

02 What ammonia does in the brain — and why it is not the whole story

"Elevated ammonia levels cause astrocyte swelling, oxidative stress, and neurotransmitter imbalances, all of which contribute to hepatic encephalopathy. Other contributing factors include systemic inflammation and changes to the blood-brain barrier. Additionally, alterations in the gut microbiome have a significant role in ammonia production and the development of hepatic encephalopathy."

More than ammonia. Understanding has moved from hyperammonemia alone to "a complex interplay of factors, including systemic inflammation, gut dysbiosis, altered neurotransmitters, and other neurotoxins such as manganese." Patidar & Bajaj list "ammonia, inflammatory cytokines, benzodiazepine-like compounds, and manganese deposition." This is why "ammonia levels do not always correlate with symptom severity."

[ALF] Acute liver failure is different. In the brain, "astrocytic glutamine synthetase converts it along with glutamate into glutamine. Glutamine acts as an osmolyte, leading to an increase in cerebral volume. This causes brain edema and intracranial hypertension, as well as increases the risk of brain herniation." Cerebral edema is "relatively rare" at West Haven grade 1 or 2 but is seen in about 25% to 35% at grade 3 and about 75% at grade 4 (StatPearls).

Glutamine made from ammonia swells astrocytes; in cirrhosis this adds to inflammation and other neurotoxins, while in acute liver failure it can cause cerebral edema.

03 Triggers tip a compensated patient into overt HE

Most episodes are provoked. KASL: "The precipitating factor can be identified in 80–90% of patients with HE" and "In many cases, HE can be improved simply by eliminating the precipitating factor." StatPearls lists gastrointestinal bleeding (eg, acute variceal bleeding), constipation, infections, dehydration (from fluid restriction, diuretics, diarrhea, vomiting or excessive paracentesis), electrolyte imbalances such as hyponatremia and hypokalemia, alcohol use disorder, medications (benzodiazepines, opioids, NSAIDs), and kidney dysfunction and azotemia. Infections include "spontaneous bacterial peritonitis or urinary tract infections."

The trigger list is the nursing checklist. GI bleeding, constipation, infection, dehydration, diuretics and low potassium are all named triggers, and sedatives "can potentially exacerbate encephalopathy and impede recovery." A shunt or TIPS lets portal blood bypass the liver.

How treatment reverses it. Lactulose acidifies the colon: "This acidification of colonic contents results in the retention of ammonia in the colon as the ammonium ion," and it "also exerts an osmotic effect in the colon, promoting distention and peristalsis, which facilitates the excretion of NH3." Rifaximin is "believed to reduce ammonia production by targeting and eliminating ammonia-producing bacteria in the colon."

A precipitant is found in most patients with HE; treatment corrects the trigger and lowers ammonia with lactulose, adding rifaximin to prevent recurrence.

Causes & risk factors

Modifiable factors are teaching targets — the patient can act on them.

Cirrhosis / chronic liver disease (type C) — StatPearls reports that about 44% of people with cirrhosis may develop HE within 5 years; Patidar & Bajaj say 50–70% (different populations) Portosystemic shunting — spontaneous shunts or TIPS (type B, bypass); HE complicates 30% to 50% of patients after TIPS (StatPearls) Acute liver failure (type A) — typically with cerebral edema (World Congress of Gastroenterology types, via StatPearls) Gastrointestinal bleeding, such as acute variceal bleeding — first on the StatPearls trigger list Infection — including spontaneous bacterial peritonitis and urinary tract infection Constipation modifiable Dehydration — fluid restriction, diuretics, diarrhea, vomiting or excessive paracentesis modifiable Low potassium or sodium; kidney dysfunction and azotemia modifiable Benzodiazepines, opioids, other sedatives; NSAIDs modifiable Alcohol use modifiable Sarcopenia — loss of muscle mass and strength raises the risk

Signs & symptoms

Each finding tied to the mechanism that produces it — and the triage it calls for.

Day–night reversal — sleeping by day, awake at night; yawning, dozing off early Hold & notify
Why: "In the initial stages of hepatic encephalopathy, patients often exhibit a disrupted sleep-wake pattern, characterized by sleeping during the day and staying awake at night." Sleep disturbances such as insomnia or hypersomnia often come before other mental-status or neuromuscular changes.
[MHE] No overt signs — deficits found only on neuropsychological testing early Expected
Why: Minimal HE "affects up to 80% of patients with cirrhosis" and shows no overt signs — only deficits "detectable through neuropsychological testing." It impairs quality of life and raises the risk of motor vehicle accidents.
Shortened attention span, trouble with simple calculations, euphoria or anxiety (West Haven grade 1 — covert HE) early Hold & notify
Why: Grade 1 signs; covert HE "includes minimal hepatic encephalopathy and West Haven grade 1." StatPearls teaches patients to recognize early warning signs "such as changes in sleep patterns, confusion, or reduced attention span."
Asterixis — flapping of the outstretched, dorsiflexed hands Hold & notify
Why: A "negative myoclonus": "brief, irregular lapses in muscle tone." Asterixis marks the onset of overt HE (ISHEN, via StatPearls) and "is typically observed during the intermediate stages." In liver failure, "Hospital admission may be necessary."
Disorientation to time, lethargy or apathy, personality change, inappropriate behavior (West Haven grade 2) Hold & notify
Why: Overt HE — "the appearance of disorientation or asterixis" (ISHEN, via StatPearls). KASL counts disorientation when three or more of day, date, month, season or year are wrong.
Rapidly worsening confusion, new agitation, somnolence, or a patient responsive only to voice (grade 3) late Report immediately
Why: 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."
Coma — no response even to pain (grade 4) late Report immediately
Why: "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.
Slurred speech, slowness, ataxia, brisk reflexes, nystagmus; twitching progressing to myoclonus Hold & notify
Why: Neuromuscular signs of HE; "restless tossing or muscle or limb twitching" can "evolve into multifocal myoclonus."
Worse handwriting; unexplained falls Hold & notify
Why: Asterixis can show up as "worsening handwriting or unexplained falls associated with subjective leg weakness."
Fever, increasing abdominal swelling, worsening jaundice Report immediately
Why: 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."
Vomiting blood; black or bloody stools Report immediately
Why: 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."
Signs of decompensated cirrhosis — jaundice, ascites, edema, palmar erythema, spider telangiectasias, muscle wasting, fetor hepaticus
Why: The physical picture of the underlying liver disease listed by StatPearls.

Diagnostics

Test In this disorder Normal
Clinical diagnosis of exclusion "Hepatic encephalopathy is a diagnosis of exclusion, and neuroimaging should be performed in cases where alternative diagnoses are suspected." Differential: hypoglycemia, hypoxia, alcohol withdrawal, subdural hematoma, intracranial hemorrhage, stroke, meningitis, Wernicke encephalopathy and post-seizure states (StatPearls). "Diagnosing hepatic encephalopathy begins with a comprehensive assessment of the patient’s vital signs and airway." Mental-status change in a patient with liver disease after other causes are ruled out —
West Haven grade "Covert hepatic encephalopathy includes minimal hepatic encephalopathy and West Haven grade 1, whereas overt hepatic encephalopathy encompasses grades 2 through 4 of the West Haven criteria." Grade 1: "Trivial lack of awareness" · 2: "Lethargy or apathy", "Minimal disorientation to time or place" · 3: "Somnolence to semi-stupor, but responsive to verbal stimuli" · 4: "Coma" StatPearls, citing AASLD/EASL 2014 —
Asterixis check Ask the patient "to fully extend the arms in front of the body, dorsiflex the wrists, and fully extend the digits with the eyes closed." Asterixis is not specific: other toxic-metabolic states (renal or respiratory failure) and drugs such as lorazepam can cause it. "A tremor is a fine rhythmic movement, while asterixis is a coarse, non-rhythmic flapping of the hands." Brief flapping or flexion of the wrist —
Serum ammonia "Neither elevated arterial nor venous ammonia concentrations are definitive for diagnosing hepatic encephalopathy." "However, a normal ammonia level has a high negative predictive value." Following "the patient’s clinical improvement or deterioration during treatment is more valuable than relying solely on serial ammonia measurements" (StatPearls); KASL notes repeated measurements "can help to determine a treatment’s effects." A high level without symptoms "alone does not justify ammonia-lowering therapy." Sample handling: test "within 1 hour of collection" and keep it cool. Often high — but not diagnostic and not a treatment target on its own —
Glucose, electrolytes, kidney function, ABG "Blood glucose levels should also be assessed, as hypoglycemia may occur"; ABG "particularly in higher grades"; hyponatremia and hypokalemia "are known triggers"; kidney injury "is a common precipitant." Look for hypoglycemia, low sodium or potassium, kidney injury —
Trigger work-up Per the KASL work-up table; "When sepsis is suspected as a trigger, investigations for infection, such as blood cultures, procalcitonin, and C-reactive protein, are essential." Infection screen (CBC, CRP, blood and urine cultures, chest X-ray, diagnostic paracentesis); GI-bleed check (CBC, stool blood, endoscopy) KASL 2020 —
Number Connection Test (bedside, covert HE) "Patients without hepatic encephalopathy typically complete the test in a duration equal to or less than their age in years." Slower than expected for age —
CT or MRI; EEG Imaging excludes "intracranial lesions, masses, or hemorrhage"; "An EEG can be helpful during the initial evaluation to rule out seizure activity." Neither is specific for HE. Rule out other causes —

Complications

Black-box warning — most severe: ■ Coma and aspiration Report immediately
In advanced stages HE "may lead to coma, which can be life-threatening." In the coma stage oral lactulose carries a "danger of aspiration."
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.
Black-box warning — most severe: ■ [ALF] Cerebral edema and herniation Report immediately
In acute liver failure, cerebral edema affects about 25% to 35% at grade 3 and about 75% at grade 4 (StatPearls).
"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.
Warning: Recurrence and residual deficits Hold & notify
"Patients with chronic liver disease who develop hepatic encephalopathy are at risk of recurrence. Even after treatment, neurological deficits may persist despite an apparent return to normal mental status."
Residual impairment "is typically greater in individuals who have had multiple overt episodes." Rifaximin added to lactulose lowers recurrence (Xifaxan label).
Warning: Injury from agitation and falls Hold & notify
Agitation "may pose a potential risk of harm to both patients and their caregivers"; asterixis can present as unexplained falls.
Sedatives worsen HE, so StatPearls notes that "in some instances, temporary restraint may be required until the patient's agitation resolves."
Warning: Lactulose overdose — diarrhea, dehydration, sodium and potassium shifts Hold & notify
"Excessive dosage can lead to diarrhea with potential complications such as loss of fluids, hypokalemia, and hypernatremia."
StatPearls: the diarrhea "is dose-dependent and decreases in severity with a reduction in the dose of lactulose"; electrolytes need "periodic electrolyte monitoring, especially in the older and critically ill population." Dehydration and hypokalemia are themselves HE triggers.
Warning: Rifaximin hypersensitivity
Xifaxan label: "Hypersensitivity reactions have included exfoliative dermatitis, angioneurotic edema, and anaphylaxis." "These events occurred as early as within 15 minutes of drug administration."
Contraindicated with "a hypersensitivity to rifaximin, any of the rifamycin antimicrobial agents, or any of the components in XIFAXAN."
Caution: Poor prognosis — transplant referral Hold & notify
"The 1-year mortality rate for individuals diagnosed with hepatic encephalopathy exceeds 40%, and these patients should be monitored closely."
"The only definitive cure for hepatic encephalopathy is liver transplantation." StatPearls, citing EASL 2022: a single overt episode "increases mortality risk independently of other organ failures," and transplant referral "should be considered."

Medications for this condition

Why each class is prescribed here — every card links to its full pharmacology page.

Laxatives First-line
Digestive / GI

Lactulose — first-line. Label indication: "For the prevention and treatment of portal-systemic encephalopathy, including the stages of hepatic pre-coma and coma." The dose is adjusted "to produce 2 or 3 soft stools daily" (label); StatPearls: "About 70% to 80% of patients with hepatic encephalopathy show improvement with lactulose treatment." In acute overt HE it is repeated until the first bowel movement, then titrated. When the patient is in the coma stage "and the danger of aspiration exists," it is given as a retention enema, and "Cleansing enemas containing soap suds or other alkaline agents should not be used." It is also used for secondary prevention after an episode. Too much causes diarrhea, fluid loss, hypokalemia and hypernatremia. Contains galactose and lactose, so use "with caution in diabetes."
Benzodiazepines
Nervous · diazepam

Avoid — a precipitant. Benzodiazepines are on the StatPearls trigger list and "can potentially exacerbate encephalopathy and impede recovery"; the KASL work-up table says to stop the benzodiazepine. Lorazepam can itself cause asterixis. Flumazenil "is not a recommended treatment for hepatic encephalopathy."
Opioid Analgesics High-alert
Nervous · morphine

Avoid or question — a precipitant. Opioids are on the StatPearls trigger list with benzodiazepines, and the KASL table directs stopping the opioid (naloxone listed). Drugs "may remain in the body for extended periods due to the liver's impaired ability to metabolize them" (StatPearls).

Beyond medications

  • Find and correct the precipitant first — bleeding, infection, constipation, dehydration, electrolyte problems, sedatives. KASL (A1): "those factors should be recognized and managed."
  • Rifaximin (no class page) — Xifaxan is "indicated for reduction in risk of overt hepatic encephalopathy (HE) recurrence in adults," 550 mg twice daily. In its trial "91% of the patients were using lactulose concomitantly," and it "significantly reduced the risk of HE-related hospitalizations by 50%." It stays in the gut: it is "non-absorbable." Label cautions: C. difficile-associated diarrhea (from mild diarrhea to "fatal colitis"), use with caution in severe (Child-Pugh C) hepatic impairment, "Monitor INR and prothrombin time" with warfarin, and hypersensitivity including anaphylaxis.
  • Nutrition — do not restrict protein. "Patients with hepatic encephalopathy should not have their protein intake restricted." StatPearls targets about 35 to 40 kcal/kg/day and 1.2 to 1.5 g/kg/day of protein; KASL: "Long-term protein restriction should be avoided because it can induce protein catabolism, hepatic dysfunction, and sarcopenia." Vegetable protein is an option if protein worsens symptoms.
  • Avoid fasting — "People with cirrhosis should avoid fasting, or going without food, for too long" (NIDDK): smaller, more frequent meals, eating every 3 or 4 hours while awake, and "having a snack before going to sleep at night or having an early breakfast after waking up."
  • Hydration and electrolytes — oral fluids, IV hydration when needed, and correction of electrolyte abnormalities.
  • Stop alcohol and hepatotoxins — "You should completely stop drinking alcohol because it can cause more liver damage" (NIDDK); avoid "certain herbal medications, or unapproved dietary supplements."
  • Not recommended: neomycin and metronidazole (KASL — side effects such as malabsorption and nephrotoxicity); routine BCAA infusions; flumazenil.
  • Refractory or shunt-related HE — shunt closure (BRTO or PARTO) "can be effective for patients with refractory hepatic encephalopathy caused by portosystemic shunts"; liver transplantation is the only cure.

Nursing considerations

The RN-specific layer — each action paired with the reason it matters.

Assessment
Assess orientation, level of consciousness and sleep pattern closely and grade the patient (West Haven); check for asterixis.
Why: Day–night reversal is an early sign; disorientation or asterixis marks overt HE, and "Any changes in the patient's mental status should be closely monitored."
Assess airway, breathing and swallowing in a drowsy patient; keep aspiration precautions.
Why: Diagnosis "begins with a comprehensive assessment of the patient’s vital signs and airway"; KASL warns of "aspiration pneumonia" from altered consciousness.
Count stools (goal 2–3 soft stools a day on lactulose) and watch for constipation or excessive diarrhea.
Why: The label titrates the dose "to produce 2 or 3 soft stools daily"; constipation is a trigger, and too much lactulose causes fluid loss and electrolyte shifts.
Screen for triggers: melena or hematemesis, fever, abdominal pain or distension, urine changes, dehydration, low potassium or sodium, recent sedatives or opioids.
Why: A precipitant can be found in 80–90% of patients (KASL), and removing it can be enough.
Monitor potassium, sodium, glucose and kidney function as ordered.
Why: Hypokalemia and hyponatremia are triggers; hypoglycemia can mimic HE; lactulose can cause hypernatremia.
Interventions
Give lactulose as ordered and titrate to the stool target; if the patient is too drowsy to swallow safely, give it as ordered by retention enema (not a soap-suds enema), with the patient on the side.
Why: Label: enema route when "the danger of aspiration exists"; StatPearls: rectal route "is preferred if there is any aspiration risk via the oral route" and a lateral recumbent position helps distribution.
Keep the patient safe from falls and injury, and avoid sedating an agitated patient.
Why: Supportive care means "ensuring a safe environment to reduce the risk of accidents or falls"; benzodiazepines "can potentially exacerbate encephalopathy and impede recovery."
Question orders for benzodiazepines, opioids or other sedatives and report them to the prescriber.
Why: They are named precipitants; the KASL table says to stop them.
Escalate at once for rapidly worsening confusion, drowsiness, new agitation, coma, vomiting blood or black stools, or fever with abdominal swelling.
Why: StatPearls lists these for "Immediate medical attention"; NIDDK: bleeding "should go to a hospital right away."
Support nutrition: small frequent meals, a bedtime snack, no protein restriction.
Why: Fasting "can increase ammonia production"; protein restriction causes catabolism and sarcopenia (KASL).
Report an elevated ammonia with no clinical change rather than treating the number.
Why: "The decision to initiate treatment should be based on a thorough clinical assessment and the presence of symptoms rather than on ammonia levels alone."
Patient and caregiver teaching
Take lactulose every day to reach 2 to 3 soft bowel movements daily; report diarrhea that will not settle or fewer stools than the goal.
Why: StatPearls: "lactulose should result in 2 to 3 soft bowel movements daily." Adherence prevents recurrence.
Learn the early warning signs (sleep changes, confusion, shorter attention span) and the triggers (infection, constipation, sedatives, bleeding, dehydration).
Why: StatPearls patient-education list; caregivers must watch closely because patients "may lack insight into their symptoms."
Seek immediate care for deteriorating mental status — rapidly worsening confusion, drowsiness or new agitation — and for fever, a swelling abdomen, worsening jaundice, vomiting blood or black stools.
Why: StatPearls and NIDDK emergency cues.
Do not drive with minimal HE or after an overt episode.
Why: StatPearls advises avoiding driving "due to the increased risk of motor vehicle accidents caused by impaired cognitive and psychomotor function."
Check with the provider before any prescription or over-the-counter medicine, including NSAIDs, acetaminophen and sleep aids; stop alcohol completely.
Why: NIDDK teaching for cirrhosis; sedatives and NSAIDs are named triggers.
On rifaximin, report diarrhea that does not improve or worsens — even months later — and watery or bloody stools.
Why: Xifaxan label: C. difficile-associated diarrhea "may range in severity from mild diarrhea to fatal colitis"; patients should contact a physician "as soon as possible."

How a real nurse thinks

The clinical-judgment loop, worked for a typical presentation — reasoning, not reference.

  1. 1
    Recognize cues

    Disorientation, day–night reversal, asterixis, agitation. Triggers present: no stool for 3 days, new diuretics with low potassium and sodium. A sedative is about to be ordered.

  2. 2
    Analyze cues

    This is overt HE (at least West Haven grade 2): "the appearance of disorientation or asterixis." Constipation, diuretics and hypokalemia are named precipitants, and benzodiazepines "can potentially exacerbate encephalopathy and impede recovery." Normal glucose makes hypoglycemia unlikely as the cause.

  3. 3
    Prioritize

    Safety and the triggers come first: prevent injury and aspiration, avoid the sedative, and get the stool count up. The ammonia value itself is not the target.

  4. 4
    Generate solutions

    Question the lorazepam order; ask about the lactulose dose, potassium replacement and the diuretics; set up fall and aspiration precautions.

  5. 5
    Take action

    SBAR: 58-year-old with cirrhosis, now disoriented with asterixis at 0300; no BM for 3 days, K 3.1, Na 131 on new diuretics. Concern for worsening hepatic encephalopathy with constipation and hypokalemia as triggers. Request: hold the lorazepam, review lactulose dosing to reach 2–3 soft stools, potassium replacement and diuretic orders. Give lactulose as ordered and keep him safe from falls and aspiration.

  6. 6
    Evaluate

    Reassess orientation, asterixis and stool count through the day; escalate at once if he becomes hard to wake, vomits blood or passes black stools, or develops fever with abdominal pain.

Scenario — you’re the nurse

Work each question before revealing the answer. Rationales explain the wrong options too.

Medical unit · 0300, night shift

A 58-year-old man with alcohol-related cirrhosis and ascites was admitted yesterday with one day of confusion. He takes lactulose at home and started furosemide and spironolactone last week. His last bowel movement was 3 days ago.

0300 — awake since midnight, pulling at his IV; oriented to name only; asks when his (deceased) mother is visiting
Exam — flapping of the outstretched hands; abdomen distended, nontender; no melena
Vital signs — T 37.1 °C · HR 96 · BP 108/64 · RR 18 · SpO2 96% on room air
Labs (evening) — K 3.1 mmol/L · Na 131 mmol/L · glucose 104 mg/dL · ammonia elevated
Orders pending — lorazepam IV as needed for agitation, requested by the covering provider
Q1 Multiple choice
Which finding best indicates that this patient has progressed to overt hepatic encephalopathy?
  1. A. Elevated serum ammonia level
  2. B. Disorientation with a flapping tremor of the outstretched hands
  3. C. Palmar erythema
  4. D. Two soft stools yesterday
Reveal answer & rationale
Answer: B
Overt HE begins with "the appearance of disorientation or asterixis" (B). An elevated ammonia (A) is not definitive — "Neither elevated arterial nor venous ammonia concentrations are definitive for diagnosing hepatic encephalopathy." Palmar erythema (C) is a sign of cirrhosis, not of encephalopathy. Two soft stools (D) is within the lactulose goal.
Q2 Select all that apply
Which factors can precipitate hepatic encephalopathy? Select all that apply.
  1. A. Constipation
  2. B. Gastrointestinal bleeding
  3. C. Hypokalemia from diuretics
  4. D. Benzodiazepines
  5. E. Spontaneous bacterial peritonitis
  6. F. A bedtime snack
Reveal answer & rationale
Answer: A, B, C, D, E
StatPearls lists constipation, GI bleeding, dehydration and electrolyte imbalance such as hypokalemia (including from diuretics), benzodiazepines and infections including spontaneous bacterial peritonitis (A–E). A bedtime snack (F) is recommended — "having a snack before going to sleep at night" helps people with cirrhosis avoid fasting.
Q3 Multiple choice
The covering provider asks for lorazepam for the patient's agitation. What is the nurse's best response?
  1. A. Give it and recheck orientation in 4 hours
  2. B. Question the order, because sedatives such as benzodiazepines can worsen encephalopathy, and use safety measures instead
  3. C. Give half the dose because of the liver disease
  4. D. Apply restraints first and then give the lorazepam
Reveal answer & rationale
Answer: B
Benzodiazepines "can potentially exacerbate encephalopathy and impede recovery," and the KASL work-up table says to stop them (B). Giving it (A) or a smaller dose (C) still exposes him to a named precipitant; drugs may also "remain in the body for extended periods" in liver disease. Restraint may be needed "in some instances" but is not paired with a sedative, and is not the first step (D).
Q4 Multiple choice
The patient becomes difficult to rouse and cannot swallow safely. Lactulose is ordered. How should the nurse expect it to be given?
  1. A. Hold all lactulose until he is awake
  2. B. As a retention enema via rectal balloon catheter
  3. C. As a soap-suds cleansing enema
  4. D. Orally with thickened fluids
Reveal answer & rationale
Answer: B
In "the impending coma or coma stage … and the danger of aspiration exists," lactulose "may be given as a retention enema via a rectal balloon catheter" (B). Holding it (A) removes the main therapy. "Cleansing enemas containing soap suds or other alkaline agents should not be used" (C). Oral dosing in a patient who cannot swallow safely (D) risks aspiration.
Q5 Multiple choice
Which statement by the caregiver shows correct understanding of home management?
  1. A. He should eat very little protein from now on
  2. B. If he has 5 or 6 watery stools a day, the lactulose is working better
  3. C. He should take lactulose so he has 2 to 3 soft bowel movements a day, and he should not drive
  4. D. A sleeping pill will help fix his night-time wakefulness
Reveal answer & rationale
Answer: C
Lactulose "should result in 2 to 3 soft bowel movements daily," and patients with HE should avoid driving (C). Protein should not be restricted (A). Excessive dosage causes diarrhea with fluid loss, hypokalemia and hypernatremia (B). Sleep aids are sedatives, which can worsen HE, and NIDDK advises checking with the provider first (D).

Common questions

What causes hepatic encephalopathy?
Common causes and risk factors include cirrhosis / chronic liver disease (type c) — statpearls reports that about 44% of people with cirrhosis may develop he within 5 years; patidar & bajaj say 50–70% (different populations), portosystemic shunting — spontaneous shunts or tips (type b, bypass); he complicates 30% to 50% of patients after tips (statpearls), acute liver failure (type a) — typically with cerebral edema (world congress of gastroenterology types, via statpearls), gastrointestinal bleeding, such as acute variceal bleeding — first on the statpearls trigger list, infection — including spontaneous bacterial peritonitis and urinary tract infection, and others.
Should the nurse trend ammonia levels to judge treatment?
Clinical status is the guide. StatPearls: following the patient's improvement or deterioration "is more valuable than relying solely on serial ammonia measurements," and a high level without symptoms does not justify treatment. KASL notes repeated measurements "can help to determine a treatment’s effects." Patidar & Bajaj, citing AASLD/EASL: a normal level in a cirrhotic patient with altered mental status "should question the diagnosis of OHE."
Why is protein no longer restricted?
Most people with decompensated cirrhosis are malnourished, and restriction causes muscle breakdown and sarcopenia — which raises HE risk. StatPearls: patients "should not have their protein intake restricted"; KASL: "Long-term protein restriction should be avoided."
How many stools should lactulose produce?
Two or three soft stools a day. The label adjusts the dose "every day or two to produce 2 or 3 soft stools daily." More than that risks dehydration, low potassium and high sodium.
What does rifaximin add?
It lowers the risk of another overt episode. In the Xifaxan trial "91% of the patients were using lactulose concomitantly," and rifaximin "significantly reduced the risk of HE-related hospitalizations by 50%." It is used with lactulose, not instead of it.
Is every flapping tremor hepatic encephalopathy?
No. Asterixis also occurs in kidney or respiratory failure and with some drugs, and alcohol withdrawal can look similar. "A tremor is a fine rhythmic movement, while asterixis is a coarse, non-rhythmic flapping of the hands."

Sources

Reviewed by Hae Suk Lee, RN

Educational summary for nursing students. Scenarios are fictional teaching cases. Always verify against current guidelines and your institution's protocols before acting in practice. Not medical advice.

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