learndrugs
Integumentary

Wound Healing & Wound Infection

Surgical site infection High-yield Verified · Sep 2026

Wound healing proceeds through hemostasis, inflammation, proliferation and remodeling. Wounds that fail to heal within 4 to 6 weeks are chronic. A surgical site infection is an infection at the operative site classified by depth and detected within a defined surveillance window.

The disorder behind collagen starts at day 5 to 7, behind the swab that has to press hard enough to express fluid, behind the wound that opens on day six, behind the Levine swab, and behind covering an evisceration and never pushing it back.

What’s going wrong in the body

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

01 Four phases, and every number matters

Hemostasis is immediate and "short-lived": "the cascade of initial vasoconstriction of blood vessels and platelet aggregation is designed to stop bleeding," with a release of adenosine 5-diphosphate clumping platelets and initiating thrombosis. The inflammatory phase "usually lasts several days" and is "characterized by hemostasis, chemotaxis, and increased vascular permeability, limiting further damage, closing the wound, removing cellular debris and bacteria, and fostering cellular migration." The neutrophil's specific job is "phagocytosis of cellular debris and bacteria, allowing for decontamination of the wound." This phase is supposed to produce warmth, redness and swelling — which is why distinguishing it from infection is the clinical skill this page exists to teach.

The proliferative phase takes "several weeks" and is "characterized by the formation of granulation tissue, reepithelialization, and neovascularization," with one timing marker to memorize: "by days 5 through 7, the fibroblasts have started to lay down new collagen and glycosaminoglycans." New vessels arrive two ways — angiogenesis from existing vessels and vasculogenesis from endothelial progenitor cells. The surface closes by migration "from the wound periphery and adjacent edges," and the detail that matters clinically is that "initially, only a thin superficial layer of epithelial cells is laid down, but a thicker and more durable layer… will bridge the wound over time." A freshly epithelialized wound looks closed and is still fragile. Meanwhile myofibroblasts contract the wound, and contraction "occurs to a much greater extent in secondary healing than in primary healing" — which is why an open wound leaves a bigger, tighter scar.

Remodeling "starts around week 3 and can last up to 12 months," and it ends in two numbers worth teaching together. "The maximal tensile strength of the incision wound occurs after about 11 to 14 weeks," and "the ultimate resulting scar will never have 100% of the original strength… and only about 80% of the tensile strength." A scar is permanently about a fifth weaker than the skin it replaced. Put the timeline against the complication and the mechanism becomes obvious: dehiscence typically occurs 5 to 8 days after surgery — exactly when the inflammatory phase is ending and the collagen laid down from day 5 to 7 is the only thing holding the wound together. The timing is the mechanism.

Learn the phases by their clocks. The day 5 to 7 collagen marker and the day 5 to 8 dehiscence window are the same fact seen from two sides, and the 80% ceiling is why lifting restrictions outlive the stitches.

02 Why a wound fails to heal — each factor attacks one arrow

Diabetes attacks the cascade at several points at once: wound hypoxia, impaired angiogenesis, markedly elevated matrix metalloproteases, defective immunity, and neuropathy-related reduced leukocyte infiltration. That enzyme elevation is why a diabetic wound digests its own new matrix — the collagen laid down on day 5 is being broken down faster than it accumulates. Smoking attacks perfusion and oxygen delivery separately: nicotine acts as a vasoconstrictor and stimulates catecholamine release, while carbon monoxide binds hemoglobin far more avidly than oxygen and occupies the carrier the wound depends on. Smoking also impairs PMN migration and fibroblast proliferation. Both mechanisms are worth giving to the patient, because "smoking is bad for healing" persuades nobody.

Nutrition is a wound intervention, and each nutrient has a named job. Arginine supports collagen deposition and neovascularization; glutamine enhances collagen maturity; vitamin C "supports the hydroxylation of proline to hydroxyproline, which is essential for proper collagen formation"; vitamin A promotes collagen and immune modulation; zinc is a cofactor for DNA/RNA polymerase; critical for cell division; magnesium and iron support collagen synthesis; and glucose fuels ATP production. On evidence: vitamin C and zinc supplementation show strongest evidence during the immediate postoperative period, and — the specific answer to "the patient is on prednisone" — vitamin A "has been shown to overcome the inhibitory effects of cortisone (and related corticosteroids) on the rate of gain in tensile strength of the wound." Note the boundary: absent prior corticosteroid exposure, "vitamin A by itself does not seem to be a significant modulator," so it is a counter to a specific impairment rather than a general booster. The calorie and protein prescription belongs to the pressure-injury page.

Infection has a threshold rather than a yes-or-no. a wound that has stalled is usually a wound carrying more bacteria than it can clear — and it does not heal until that burden comes down. The threshold figure often quoted for this does not appear in a source this page can cite, so it is not printed here. The remaining impairing factors are tissue hypoxia, corticosteroids, immunosuppression, arterial/venous insufficiency, and mechanical stress, plus advanced age and obesity — obesity through "oxidative stress" and adiponectin deficiency causing impaired perfusion, reduced oxygen delivery, pressure ulcers, and blunted immune responses, with effects that are "largely reversible through weight loss." A wound that has not healed in 4 to 6 weeks is chronic by definition.

03 Surgical site infection — classification, and the window that is not what most sources say

Two classification systems run in parallel and are often confused. The surgical wound class describes the operation and is assigned in the operating room by someone who was there: The four names are Clean, Clean-Contaminated, Contaminated and Dirty/Infected, assigned in rising order of expected contamination — and the surveillance manual that records them states plainly that it "does not offer guidance on which wound class should be assigned." So the names are national; what each class contains is a schema the organisation adopts, and the class descriptions belong to the healthcare-associated-infections page, about 40% or more. NHSN itself confirms wound class "is assigned by a person involved in the surgical procedure" and states it "does not offer guidance on which wound class should be assigned," so the descriptions of each class are relayed from StatPearls rather than defined by NHSN.

The SSI depth classification is NHSN's own, and the January 2026 criteria are worth reading as written. Superficial incisional SSI "involves only skin and subcutaneous tissue of the incision" and requires at least one of: purulent drainage from the superficial incision; organisms identified from an aseptically obtained specimen; a superficial incision deliberately opened, re-accessed or aspirated by a clinician with antimicrobial therapy for at least 2 calendar days plus new or worsening localized pain or tenderness, localized swelling, erythema or heat; or a physician diagnosis. Superficial events are more than 50% of all SSIs. Deep incisional SSI involves deep soft tissues of the incision, for example fascial and muscle layers, with the same style of criteria — and note that spontaneous dehiscence is written into the deep-SSI criterion. Organ or space SSI involves the organ/space tissues deeper than the fascia/muscle, evidenced by purulent drainage from a drain placed into the organ space, organisms from organ-space fluid or tissue, or an abscess on examination, histopathology or imaging.

The surveillance window is where the common shorthand goes wrong. The familiar version is "30 days, or 90 days for cardiac, orthopedic and vascular procedures." NHSN's own text is more specific in two ways. First, the 90-day list is a named procedure list, not a set of specialties: breast surgery, cardiac surgery, coronary artery bypass graft, craniotomy, spinal fusion, open reduction of fracture, herniorrhaphy, hip prosthesis, knee prosthesis, pacemaker surgery, peripheral vascular bypass surgery and ventricular shunt. Everything else — abdominal aortic aneurysm repair, limb amputation, appendectomy, cholecystectomy, colon surgery, cesarean section, hysterectomy, kidney transplant, exploratory laparotomy — is 30 days. Second, and more important: "superficial incisional SSIs are monitored for a 30-day period for all procedure categories." So the 90-day window applies only to deep incisional and organ/space events after those listed procedures. Day 1 is the procedure date.

Wound class describes the operation; SSI depth describes the infection. The window rule most sources give is too loose: superficial events are always 30 days, and the 90-day window belongs to a named procedure list, not to whole specialties.

04 Dehiscence and evisceration — one is a subset of the other

Dehiscence is "a partial or total separation of previously approximated wound edges, due to a failure of proper wound healing." Evisceration is not a separate event — it is "a complication of complete wound dehiscence, where intraabdominal organs herniate through the open wound." Dehiscence carries a 16% mortality, which is the number that justifies treating the warning sign as urgent. The risk factors are the impairment list with mechanics added: "ischemia, infection, increased abdominal pressure, diabetes, malnutrition, smoking, and obesity," plus increasing age, emergency surgery, cancer, steroid use, anemia, jaundice and chronic obstructive pulmonary disease.

The warning sign is worth quoting exactly, because the classic teaching overstates it. The source says "increased bleeding or drainage at the site" indicates superficial separation. It does not say serosanguineous drainage specifically, and the observation that matters is the increase rather than the colour — a dressing that needs changing more often than yesterday is the finding. Prevention is surgical technique: "taking large fascial bites during abdominal closure" and avoiding "excess tension on the wound," which both raises dehiscence risk and reduces healing perfusion.

The response depends on depth. Dehiscence is a complication to be "immediately reported." Superficial dehiscence "can be managed with abdominal binders to reduce strain on the wound and prevent further dehiscence." Deep (fascial) dehiscence "is a surgical emergency and must be closed in the operating room." For evisceration, the wound is covered "with a sterile saline dressing until the herniating organs can be reduced back into the abdomen" — the bowel "wrapped in gauze moistened with warm saline to prevent fluid losses" while the patient is "prepared for emergent abdominal exploration." What is absent: any position. No fetched source states low Fowler's with knees bent, or any other position, for dehiscence or evisceration; the sourced tension-reducing measure is the abdominal binder.

Evisceration is complete dehiscence with organs through the wound, not a different diagnosis. Note the deliberate absence: no source fetched for this page states a position, so the binder is the tension-reducing measure that can be taught.

Causes & risk factors

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

Diabetes mellitus — wound hypoxia, impaired angiogenesis, defective immunity, neuropathy-related reduced leukocyte infiltration, and markedly elevated matrix metalloproteases, so the wound digests its own new matrix modifiable Smoking — two separate mechanisms. Nicotine "acts as a vasoconstrictor"; carbon monoxide binds hemoglobin far more avidly than oxygen and occupies the carrier. It also impairs neutrophil migration and fibroblast proliferation modifiable Malnutrition, each nutrient with a job: arginine for collagen deposition and neovascularization, glutamine for collagen maturity, vitamin C for the hydroxylation of proline to hydroxyproline, vitamin A for collagen and immune modulation, zinc as a DNA and RNA polymerase cofactor, magnesium and iron for collagen synthesis modifiable Corticosteroids — and the sourced counter is specific: vitamin A aids corticosteroid-induced impairment modifiable Bacterial burden the wound cannot clear — a colonized wound heals and an infected one does not, and the difference is quantity as much as species modifiable Obesity — oxidative stress and adiponectin deficiency producing impaired perfusion, reduced oxygen delivery, pressure ulcers and blunted immune responses, with effects "largely reversible through weight loss" modifiable Tissue hypoxia, immunosuppression, arterial or venous insufficiency and mechanical stress; plus advanced age Procedural factors the team controls during the operation itself — a genuine risk factor for the wound, and the prevention bundle that addresses them is owned by the healthcare-associated-infections page modifiable For dehiscence specifically — ischemia, infection, increased abdominal pressure, emergency surgery, cancer, anemia, jaundice and chronic obstructive pulmonary disease modifiable Bite wounds carry their own risk: cat bites are infected about 30% of the time and nearly 33% of hand bites become infected, with puncture wounds higher still

Signs & symptoms

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

Warmth, redness and swelling in the first several days — this is normal early Expected
Why: The inflammatory phase "usually lasts several days" and is supposed to produce exactly these findings while neutrophils clear debris and bacteria. Calling normal inflammation an infection is as common an error as missing a real one, and it generates unnecessary antibiotics.
Purulent drainage, fluctuance, or a course that worsens instead of settling after the first few days Hold & notify
Why: These are the discriminators. Infection is signalled by "erythema, pain, swelling, fluctuance, purulence," and in a surgical wound by "purulent discharge from the surgical site." Purulence and fluctuance are not features of normal inflammation, and normal inflammation improves rather than escalates.
Beefy red, bleeding tissue in the wound bed — granulation early Expected
Why: Quoted as "beefy red bleeding tissue that indicates healing in progress." It is the finding you want, and recognizing it prevents a granulating wound being debrided mechanically, which is contraindicated where granulation exceeds devitalized tissue.
Whitish-yellow slough that does not bleed, or black eschar Hold & notify
Why: Slough is "white-ish/yellow slough that does not bleed (not healthy)"; eschar is "black/charred-appearing callous-like tissue (not healthy)." Both indicate devitalized tissue — but a dry, intact eschar on a heel or sacrum without infection signs is left alone, because it acts as a biological covering.
Increased bleeding or drainage at the incision around postoperative day 5 to 8 Report immediately
Why: 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.
Separated wound edges — dehiscence Report immediately
Why: "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.
Abdominal organs visible through the wound — evisceration Report immediately
Why: "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.
Fever with significant erythema or cellulitis spreading from a wound Report immediately
Why: 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.
A wound that stops progressing, unhealed at 4 to 6 weeks late Hold & notify
Why: That is the definition of a chronic wound. It is a finding in its own right rather than a slow version of normal, and it should prompt a hunt for the specific impairing factor — bacterial load above the threshold, diabetes, smoking, malnutrition or perfusion failure.
A cat bite becoming painful and red within 12 to 18 hours Hold & notify
Why: Cat bite infections "typically present within 12 to 18 hours after injury," which is faster than most wound infections and faster than patients expect. Pasteurella multocida is the commonest isolate, which is also why the prophylactic agent has a beta-lactamase inhibitor.

Diagnostics

Test In this disorder Normal
Wound assessment The assessment is the diagnostic in this disorder — and the pressure-injury page owns the documentation standard and the tissue vocabulary this assessment uses. Note two deliberate gaps: the fetched chapter instructs you to measure undermining and tunneling without defining either term, and it gives no clock-face convention. The fuller documentation standard, including photographs and odour, belongs to the pressure-injury page Measure depth, length and width, and measure the amount of undermining and tunneling. Describe tissue type, exudate type and amount, periwound skin, and infection signs StatPearls, Wound Assessment —
Wound-bed tissue and exudate vocabulary The four exudate types are listed but not defined in the fetched source, so the vocabulary is taught as vocabulary and no invented definitions are supplied. The same three tissue descriptions appear on the pressure-injury page, and the two agree Granulation — "beefy red bleeding tissue that indicates healing in progress." Slough — "white-ish/yellow slough that does not bleed (not healthy)." Eschar — "black/charred-appearing callous-like tissue (not healthy)" StatPearls, Wound Assessment Exudate types: serous, serosanguineous, sanguineous, purulent. Amount: minimal, light, moderate, heavy
Wound culture — the Levine technique The preparatory step is part of the technique: cleanse the wound with normal saline and wipe off surface contaminants before swabbing (Open RN wound-culture checklist). Swabbing the pus on top cultures the surface, not the tissue. Culture technique is what this page owns; the decision about when to culture is a management one made with the team The Levine technique "involves rotating the wound swab over a 1-cm(2) area of the wound." The comparator, the Z technique, "involves rotating the swab between the fingers in a zigzag fashion across the wound without touching the wound edge" International Wound Journal, 2011 — the validating study The Levine technique "detected significantly more organisms than the Z technique (P≤ 0· 001)" — the authors attribute this to its "ability to express fluid from the wound bed"
Superficial incisional SSI criteria Superficial incisional SSIs are monitored for 30 days for ALL procedure categories — there is no 90-day version of a superficial event, which is the part the common shorthand loses Within 30 days of the procedure (day 1 = the procedure date), involving only skin and subcutaneous tissue, plus at least one of: purulent drainage; organisms from an aseptically obtained specimen; a deliberately opened, re-accessed or aspirated incision with antimicrobial therapy for at least 2 calendar days and new or worsening localized pain, swelling, erythema or heat; or a physician diagnosis CDC NHSN Patient Safety Component Manual, chapter 9, January 2026 Superficial events are more than 50% of all SSIs
Deep incisional and organ/space SSI criteria The 90-day list is a named procedure list, not a set of specialties: breast surgery, cardiac surgery, coronary artery bypass graft, craniotomy, spinal fusion, open reduction of fracture, herniorrhaphy, hip prosthesis, knee prosthesis, pacemaker surgery, peripheral vascular bypass and ventricular shunt. Colon surgery, appendectomy, cesarean section, hysterectomy and laparotomy are all 30 days Deep incisional involves deep soft tissues of the incision, for example fascial and muscle layers, and its criteria explicitly include an incision that spontaneously dehisces. Organ/space involves tissues "deeper than the fascia/muscle," evidenced by purulent drainage from a drain placed into the organ space, organisms from organ-space fluid or tissue, or an abscess on examination, histopathology or imaging CDC NHSN Patient Safety Component Manual, chapter 9, January 2026 Window: 30 or 90 days according to the NHSN procedure list
Surgical wound class Wound class is assigned in the operating room "by a person involved in the surgical procedure," and NHSN states it "does not offer guidance on which wound class should be assigned" — so the description of what each class contains is relayed from StatPearls rather than defined by NHSN. It describes the operation; SSI depth describes the infection Four class names, describing the operation in rising order of expected contamination: clean, clean-contaminated, contaminated, dirty or infected CDC NHSN, January 2026 — which assigns wound class but does not define what each class contains —
Imaging and microbiology in SSI There is a rising prevalence of methicillin-resistant S. aureus and extended-spectrum beta-lactamase organisms, attributed to inappropriate broad-spectrum antibiotic use. SSIs are the leading cause of unplanned postoperative readmission Diagnosis is primarily clinical evaluation. Imaging — ultrasound, CT or MRI — is indicated for suspected deep or organ-space infections; CT evidence of abscess is itself a deep incisional criterion CDC NHSN, January 2026, for the depth definitions and windows The likely organism follows the operative site — skin flora after procedures that do not enter a hollow viscus, and bowel flora after those that do
Bite-wound microbiology The organism list is the justification for the drug: mixed aerobes and anaerobes are why amoxicillin-clavulanate rather than amoxicillin is preferred. Tetanus (CDC): a bite is a dirty wound — vaccinate if the history is unknown or the primary series incomplete, or if the last dose was 5 or more years ago; tetanus immune globulin is added only for unknown or incomplete vaccination, HIV, or severe immunodeficiency. Rabies prophylaxis is immediate "for bites near the brain" From cats, Pasteurella multocida is the most commonly isolated pathogen, plus anaerobes. From dogs, Pasteurella canis. In immunocompromised patients, Capnocytophaga canimorsus, "a gram-negative bacterium commonly found in the canine oral cavity" StatPearls, Animal Bites —

Complications

Black-box warning — most severe: ■ Dehiscence and evisceration Report immediately
Dehiscence carries 16% mortality and clusters at postoperative day 5 to 8. Heralding cue: increased bleeding or drainage at the site. Evisceration is complete dehiscence with intraabdominal organs herniating through the wound.
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.
Warning: Surgical site infection Report immediately
A common complication of surgery, a large share of all healthcare-associated infections, and the leading cause of unplanned postoperative readmission — the healthcare-associated-infections page owns the surveillance burden.
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.
Warning: Progression to systemic infection Report immediately
Systemic signs — fever, significant erythema, cellulitis — require systemic antibiotics and blood cultures. This is the transition from a local wound problem to a systemic one.
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.
Warning: Harms of the dressing itself
A topical wound agent can damage what it is meant to protect, and the two ways it does so are worth holding as a pair: it can slow re-epithelialization, and it can obscure the wound bed so that deterioration underneath goes unseen.
A dressing that hides the wound hides deterioration — which is why an agent that forms a crust over the bed is a reason to schedule assessment rather than to skip it. Some antimicrobial preparations also carry systemic toxicity, and where they do, the cue is a routine laboratory check rather than a symptom, because the patient feels nothing until the count is already low. The burns page owns the specific burn agents, their contraindications and their monitoring, and the class page owns the agent-by-agent comparison. What belongs here is the habit of asking, at every dressing change, whether the product is still doing more for the wound than to it.
Caution: Chronic non-healing wound, and the permanently weaker scar
A wound that has not healed in 4 to 6 weeks is chronic. And even a wound that heals well reaches only about 80% of the original tensile strength, peaking at 11 to 14 weeks.
The 80% ceiling is the sourced rationale for lifting restrictions that outlast the stitches, and for teaching a patient to splint an incision when coughing long after it looks healed. It pairs with the fragility of new epithelium: "initially, only a thin superficial layer of epithelial cells is laid down," with the durable layer arriving later, so a wound that looks closed is not yet strong. For the chronic wound, the useful move is to name which arrow is blocked rather than escalating dressings: a bacterial burden the wound cannot clear, diabetes with its markedly elevated matrix metalloproteases, smoking, malnutrition, or arterial or venous insufficiency. Hyperbaric oxygen — 100% oxygen at 2 to 3 atmospheres — improves chronic diabetic wounds and necrotizing fasciitis outcomes with benefits appearing "within approximately 6 weeks," but its long-term effects are described as "questionable" and it carries risks of oxygen fire and pneumothorax.

Medications for this condition

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

Penicillins First-line
Immune / Anti-infective · amoxicillin

The sourced indication on this page is the bite wound, and the agent is specific: "amoxicillin-clavulanate is the preferred prophylactic antibiotic," with a 7-day course recommended for closed wounds. The disorder-side reason it is amoxicillin-clavulanate rather than amoxicillin is the flora: bites carry mixed aerobes and anaerobes — Pasteurella multocida from cats, Pasteurella canis from dogs, staphylococci, streptococci, anaerobes, and Capnocytophaga canimorsus in immunocompromised patients — and the beta-lactamase inhibitor is what covers them. The organism list is the justification for the drug. The risk figures explain why prophylaxis is worth giving at all: cat bites are infected about 30% of the time, nearly 33% of hand bites become infected, and cat-bite infections declare themselves fast, typically within 12 to 18 hours after injury. For penicillin allergy the sourced alternatives are "extended-spectrum cephalosporins," or doxycycline or trimethoprim-sulfamethoxazole plus metronidazole or clindamycin. Two non-drug rules travel with the prescription and are easy to get wrong: deep puncture wounds and wounds involving joint spaces are not closed, and cat bites are "inherently high-risk and typically left open" — while uncomplicated wounds "can be safely closed after extensive cleaning and debridement if presenting within 8 hours of injury." Penicillin pharmacology, allergy cross-reactivity and beta-lactamase mechanics belong to the class page.
Clindamycin / Lincosamides
Immune / Anti-infective · clindamycin

Clindamycin has one sourced position on this page, and it is a narrow one: it is part of an alternative bite-wound regimen in penicillin allergy: doxycycline or trimethoprim-sulfamethoxazole plus metronidazole or clindamycin, where its role is the anaerobic coverage that the partner agent lacks. It is a substitution rather than a first choice, which is worth stating plainly because an allergy label frequently drives a reflex switch without anyone checking whether the allergy is real or what is being covered. The disorder-side logic is the flora: bite wounds carry anaerobes, and whichever backbone replaces amoxicillin-clavulanate has to account for them. Clindamycin pharmacology, and in particular its association with Clostridioides difficile infection, belongs to the class page — as does the broader point that every unnecessary broad-spectrum exposure feeds the resistance pattern now being seen in surgical site infections.
Wound & Burn Agents First-line
Integumentary · silver sulfadiazine

What a topical wound agent is for, on this page, is the environment it creates rather than the organism it kills. The sourced principle is the one the healing phases chapter states: a dressing or topical preparation should create a moist environment to prevent wound desiccation but allow for absorption of additional exudate, while allowing airflow, preventing particulate contamination and being "impermeable to bacteria or microbiota". Every product in this class is judged against those four jobs, and a product that does one of them well at the cost of another is a trade, not an upgrade. Two trades matter enough to name in general terms. An agent that sits opaquely on the surface hides the wound bed underneath it, and a dressing that hides the wound hides deterioration — which is why an agent that forms a crust is a reason to schedule assessment rather than to skip it. And an agent that is toxic to the organisms in the wound is often toxic to the cells rebuilding it, which is why antimicrobial preparations are chosen for a reason and stopped when that reason ends rather than continued by habit. The burns page owns the burn-specific agents, including their indications, contraindications and monitoring; the pressure-injury page owns the dressing-category table; and the class page owns the agent-by-agent comparison. What belongs here is the standard they are all measured against.

Beyond medications

  • Primary, secondary and tertiary intention, and the mechanical difference that follows. Primary closure brings the wound edges together with sutures or staples, and healing proceeds by epithelialization and connective-tissue deposition. Secondary healing leaves the wound open to granulate, contract and epithelialize — slower, with a higher infection risk, and the right choice for chronic or heavily contaminated wounds. Tertiary, or delayed primary, leaves a grossly contaminated wound open for 3 to 7 days after exploration and debridement, then closes it. The mechanical consequence is sourced and worth teaching: "wound contraction occurs to a much greater extent in secondary healing than in primary healing" — which is why an open wound leaves a bigger, tighter scar.
  • Moist wound healing, quoted: dressings should create a moist environment to prevent wound desiccation but allow for absorption of additional exudate, while allowing airflow, preventing particulate contamination and being "impermeable to bacteria or microbiota." The dressing-category table belongs to the pressure-injury page. The TIME acronym appears in no source fetched for this page and is therefore not used — the underlying content that is sourced is debride devitalized tissue, control bioburden, keep the bed moist while absorbing excess, and assess the wound edges.
  • Debridement, by selectivity — and the pressure-injury page owns the list. The methods differ in one property that decides everything: autolytic and enzymatic debridement are selective, mechanical debridement is not, and surgical or sharp debridement is the most aggressive and can be combined with any of them. The indication is "the removal of devitalized tissue, such as necrotic tissue, slough, bioburden, biofilm, and apoptotic cells," plus removing infection sources, decreasing bacterial burden and preparing the bed for grafting. Follow the link for the full method-by-method comparison rather than learning it twice.
  • The debridement contraindication every nurse must know: debridement is contraindicated on dry, intact eschar with no clinical evidence of underlying infection — the classic example being an unstageable pressure injury with intact eschar on the sacrum, buttock or heel — because the eschar is acting as a biological covering. Sharp debridement is specifically contraindicated there. The pressure-injury page owns this rule, the debridement method comparison and the wound-bed tissue vocabulary, and states them identically; this page carries the rule anyway because a surgical wound service meets the same heel.
  • Negative-pressure wound therapy, in one paragraph. It applies controlled subatmospheric pressure to reduce exudate and promote granulation, working by contracting the wound, generating microscopic mechanical stress at the edges, removing inflammatory exudate to restore microvascular circulation, and promoting hypoxia-driven release of vascular endothelial growth factors. What a nurse must hold is the contraindication set and one complication: it is not applied over exposed vasculature or bowel, untreated osteomyelitis, underlying malignancy, necrotic tissue that has not yet been debrided, or an unexplored fistula — and inadvertent retention of a piece of foam can cause infection, which makes counting the foam at every change a safety step rather than a formality. Pressure settings, dressing-change frequency and the monitoring set belong to the device protocol.
  • Which wounds are not closed primarily: animal and human bites (infection risk), dirty or contaminated wounds, and wounds with significant tissue loss — plus "deep puncture wounds and those involving joint spaces," with cat bites "typically left open." Closure methods where closure is appropriate: sutures for excellent tensile strength, with simple interrupted stitches giving the best cosmetic result; staples for linear lacerations on scalp/extremities, quick, with similar healing rates and infection outcomes as sutures; and adhesives for percutaneous or simple pediatric wounds, "quick and relatively painless," with lower infection rates; minimal inflammation.
  • Surgical site infection prevention is real, and it is owned elsewhere: the CDC and HICPAC prevention bundle, and the surgical antibiotic prophylaxis that goes with it, are covered on the healthcare-associated-infections page. One consequence is worth carrying here, because it is wound-side rather than system-side: every element of that bundle exists to keep the wound's starting bacterial burden low, which is the one variable the rest of this page cannot influence once the incision is closed.
  • Prevention of dehiscence is surgical technique: "taking large fascial bites during abdominal closure" and avoiding "excess tension on the wound," which raises dehiscence risk and reduces healing perfusion.

Nursing considerations

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

Assessment & monitoring
Distinguish normal inflammation from infection by course and by purulence, not by warmth and redness alone.
Why: The inflammatory phase "usually lasts several days" and is supposed to produce warmth, redness and swelling. The discriminators are purulence, fluctuance, and a course that worsens rather than settles after the first few days. Treating normal inflammation as infection generates unnecessary antibiotics.
Measure and describe every time: depth, length, width, undermining and tunneling, tissue type, exudate type and amount, periwound skin and infection signs.
Why: The assessment is the diagnostic here. Note two honest gaps in the source: it tells you to measure undermining and tunneling without defining either, and gives no clock-face convention — so document what you measured and where, using your unit's convention rather than an invented standard.
Watch postoperative day 5 to 8 hardest, and treat increased bleeding or drainage at the site as the dehiscence warning sign.
Why: Dehiscence typically occurs 5 to 8 days after surgery — exactly when inflammation is ending and the collagen laid down from day 5 to 7 is the only thing holding the wound. The source says "increased bleeding or drainage," so the increase is the finding rather than the colour. Mortality reaches 16%.
Escalate a wound with fever and significant erythema or spreading cellulitis for blood cultures and systemic antibiotics.
Why: That is the sourced threshold at which a local wound problem becomes systemic. A superficial incisional infection drained at the bedside and a wound with fever and spreading erythema are the same diagnosis at very different urgencies, and systemic involvement is the discriminator.
Recognize granulation, slough and eschar on sight, and know that a dry, intact eschar on a heel or sacrum without infection signs is left alone.
Why: Granulation is "beefy red bleeding tissue that indicates healing in progress"; slough and eschar are explicitly "not healthy." But debridement is contraindicated on "dry and intact eschars with no clinical evidence of underlying infection," because the eschar acts as a biological covering.
On any antimicrobial topical agent, follow whatever laboratory monitoring it carries, and expect that some agents will crust over the wound bed.
Why: Where a topical agent carries systemic toxicity, the patient feels nothing until the count is already low, so the scheduled check is the safeguard. And a crust over the bed is expected with some agents but consequential, because it prevents adequate assessment of the wound underneath. The burns page owns the agent-specific monitoring.
Interventions & safety
In evisceration: cover with a sterile saline dressing, do not try to put the organs back, and prepare the patient for emergency surgery. Activate the surgical team.
Why: Quoted: the wound is covered "until the herniating organs can be reduced back into the abdomen," and the patient "should be prepared for emergent abdominal exploration." Evisceration is complete dehiscence with organs through the wound, not a different diagnosis.
In dehiscence: report it immediately; apply an abdominal binder for superficial separation; treat deep fascial separation as a surgical emergency — the patient "should undergo hemodynamic stabilization."
Why: This is what the sources support. Note what is not in them: a position. No source fetched for this page states low Fowler's with knees bent or any other position — the sourced tension-reducing measure is the abdominal binder, so that is what gets applied.
Clean the wound with sterile saline first, then culture with the Levine technique — rotate the swab over a 1 cm-squared area with enough pressure to express fluid from the wound bed.
Why: Cleansing with normal saline removes "surface contaminants" first (Open RN), and the validating study found the Levine technique "detected significantly more organisms than the Z technique." Swabbing the pus on top cultures the surface, not the tissue.
Never apply negative-pressure therapy over exposed vessels or bowel, untreated osteomyelitis, malignancy, necrotic tissue or an unexplored fistula — and account for every piece of foam at each change.
Why: Those are the five explicit contraindications, and necrotic tissue must be debrided first rather than cleaned up by the device. "Inadvertent retention of foam dressing, which can lead to infection" is a named complication, which makes the count a safety step rather than a formality.
Patient teaching
Teach what normal healing looks like, so the patient can tell the difference: several days of warmth, redness and swelling are expected; purulent drainage, increasing pain, fluctuance, odour or fever are not.
Why: A patient who has not been told that early redness is normal calls about it and, more dangerously, may decide that later redness is also normal. The sourced post-closure monitoring set is exudate type and amount, skin integrity, wound margin changes, infection signs and pain level.
Tell them the wound is weaker than it looks: peak strength is not reached until 11 to 14 weeks, and the scar never exceeds about 80% of the original strength.
Why: This is the sourced rationale for lifting restrictions and for splinting the incision when coughing, and it explains why the restrictions outlast the stitches. It pairs with the fragility of new epithelium, which is laid down thin first and thickens later.
Sell smoking cessation on its two mechanisms: nicotine constricts the vessels feeding the wound, and carbon monoxide occupies hemoglobin far more avidly than oxygen can.
Why: "Smoking is bad for healing" persuades nobody. Two concrete mechanisms, one about delivery pipes and one about the cargo, give a patient something to reason with — and smoking also impairs neutrophil migration and fibroblast proliferation.
Treat nutrition and glucose control as wound interventions and say so: vitamin C and zinc have the strongest evidence in the immediate postoperative period, and vitamin A specifically counters corticosteroid-impaired healing.
Why: Each nutrient has a named job — vitamin C supports the hydroxylation of proline to hydroxyproline for collagen, zinc is a DNA and RNA polymerase cofactor — and vitamin A counters a corticosteroid-impaired wound specifically rather than boosting healing generally. The diabetic wound has matrix metalloproteases markedly higher than in an acute wound, so glucose control is not generic advice. The calorie and protein prescription belongs to the pressure-injury page.
After a bite, give the specifics: cat bites are infected about 30% of the time, hand bites nearly 33%; cat-bite infection appears within 12 to 18 hours; some bites are deliberately left open; the course is 7 days of amoxicillin-clavulanate.
Why: A patient sent home with an open cat bite and no explanation assumes the wound was mismanaged. The 12-to-18-hour figure also sets the return threshold correctly, because it is faster than patients expect from a small puncture.
If a topical agent will crust over the wound, say so in advance, so that neither the patient nor the next nurse mistakes the crust for necrosis.
Why: Removing such a crust requires painful mechanical debridement, and warning about it in advance prevents both alarm and the opposite error — assuming the wound underneath is fine because the surface looks stable. The burns page carries the agent that does this most often and the detail of managing it.

How a real nurse thinks

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

  1. 1
    Recognize cues

    Four clusters, and the date is one of them. The timing cue: this is postoperative day 6, inside the day 5 to 8 window when dehiscence clusters, because the inflammatory phase is ending and the collagen laid down from day 5 to 7 is the only thing holding the wound. The drainage cue: drainage that has increased enough to soak two dressings overnight — and the sourced warning sign is "increased bleeding or drainage at the site," so the increase is the finding rather than its colour. The wound cue: the lower third has gaped with separated edges, which is dehiscence by definition. The systemic cue: temperature 38.1 °C with a heart rate of 104. And the background: diabetes, with matrix metalloproteases up to markedly higher than in an acute wound; smoking, constricting vessels and occupying hemoglobin; and a clean-contaminated operation lasting 4 hours 20 minutes.

  2. 2
    Analyze cues

    This is wound dehiscence, and it is not a minor finding: mortality reaches 16%. Two things follow immediately. First, dehiscence is also an NHSN deep incisional surgical site infection criterion — "spontaneously dehisces" is written into it — so this is simultaneously a complication and a reportable infection event. Second, he is at risk of evisceration, which is not a different diagnosis but "a complication of complete wound dehiscence, where intraabdominal organs herniate through the open wound." Now place it on the surveillance calendar: colon surgery is on the 30-day list, not the 90-day one, and day 1 was the procedure date — so a day-6 event is well inside the window either way.

  3. 3
    Prioritize

    The priority is to prevent the dehiscence from becoming an evisceration and to get a surgeon to the bedside, in that order and simultaneously. The sourced actions: report the dehiscence immediately; apply an abdominal binder to reduce wound strain; and if the fascia has given way, treat it as a surgical emergency for the operating room. Alongside that, remove the triggers that raise intra-abdominal pressure — coughing, vomiting, straining — and make sure he knows to splint the incision. Culturing comes after the wound is covered and the surgeon is called, not before. What is explicitly not a priority: repositioning him into any particular position, because no source fetched for this page states one, and the sourced tension-reducing measure is the binder.

  4. 4
    Generate solutions

    Anticipate that the surgeon will assess for the depth of separation and for fascial involvement, and that he may go to the operating room. Anticipate the wound being managed open, by secondary intention, with a dressing that keeps the bed moist while absorbing exudate — remembering that "wound contraction occurs to a much greater extent in secondary healing." Anticipate a wound culture, taken after cleansing the wound with sterile saline and using the Levine technique — rotating the swab over a 1 cm-squared area with enough pressure to express fluid, because that technique "detected significantly more organisms than the Z technique." Anticipate systemic antibiotics and blood cultures if his fever climbs with significant erythema or cellulitis. Anticipate debridement of any devitalized tissue before anything else, and anticipate that negative-pressure wound therapy may be considered afterwards — but not before, because necrotic tissue must be debrided first and is an explicit contraindication. And anticipate that the diabetes and the smoking will be the reasons this wound is slow, so glucose control and cessation support are part of the plan rather than discharge advice.

  5. 5
    Take action

    Protect the wound with a sterile dressing. Apply the abdominal binder. Call the surgeon immediately and say the three things that matter: postoperative day 6, increased drainage overnight, and separated wound edges with a temperature of 38.1 and a heart rate of 104. Keep monitoring his vital signs, watching the heart rate trend and the blood pressure rather than either in isolation — deep (fascial) dehiscence calls for "hemodynamic stabilization" on the way to the operating room. Tell him what has happened and what is about to happen, and teach him to splint the incision if he needs to cough, because increased intra-abdominal pressure is a named trigger. Cleanse and culture with the Levine technique if there is purulent discharge. Document the wound properly — length, width, depth, undermining and tunneling, tissue type, exudate, periwound — so the next assessment has something to compare against.

  6. 6
    Evaluate

    Evaluate on two clocks. Immediately: has the separation progressed, is any bowel visible, and is the heart rate still climbing? If a loop of bowel appears after he coughs, the diagnosis is evisceration: cover with a sterile saline dressing, do not attempt to replace the organs, and activate the surgical team — reduction happens in the operating room. If instead the picture becomes purulent discharge with erythema extending 4 cm from the incision and a temperature of 38.6 °C, that meets superficial incisional SSI criteria and is comfortably inside the 30-day window that applies to colon surgery; management is opening the incision, draining, debriding necrotic tissue, and — because there are systemic signs — blood cultures and systemic antibiotics. Over weeks: the wound is managed open by secondary intention, and evaluation is whether it is progressing. A wound still unhealed at 4 to 6 weeks is chronic by definition, and the response is to name which arrow is blocked rather than to escalate dressings — bacterial load above a bacterial burden he cannot clear, his diabetes, or his smoking. The long-horizon teaching is the 80% ceiling: peak tensile strength at 11 to 14 weeks, never more than about 80% of the original, which is why his lifting restrictions outlast the appearance of a healed scar.

Scenario — you’re the nurse

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

Surgical ward, postoperative day 6 after open colectomy

A 64-year-old with type 2 diabetes and a 30-pack-year smoking history, six days after an open colectomy. The operation took 4 hours 20 minutes.

Wound class — clean-contaminated
Overnight — increasing serosanguineous drainage that soaked two dressings
This morning — the lower third of the incision has gaped; the edges are separated
Vitals — temperature 38.1 °C · heart rate 104
Risk factors carried in — diabetes, smoking, and a long operation
Q1 Multiple choice
On postoperative day 6, a patient's abdominal incision separates and a loop of bowel protrudes. What does the nurse do first?
  1. A. Gently replace the bowel and apply a dry sterile dressing
  2. B. Cover the wound with a sterile saline dressing and activate the surgical team
  3. C. Place the patient in low Fowler's position with knees bent
  4. D. Irrigate the exposed bowel with povidone iodine
Reveal answer & rationale
Answer: B
Evisceration is covered "with a sterile saline dressing until the herniating organs can be reduced back into the abdomen," and the patient "should be prepared for emergent abdominal exploration" (B). Option A commits the specific error the source forbids and adds a dry dressing where a saline one is indicated. Option C is the interesting distractor: no source fetched for this page states any position for dehiscence or evisceration — the sourced tension-reducing measure is the abdominal binder, so the position is not what this page teaches. Option D invents a step. Evisceration is not a separate diagnosis from dehiscence; it is "a complication of complete wound dehiscence."
Q2 Select all that apply
Which statements about surgical site infection surveillance windows are correct? Select all that apply.
  1. A. Superficial incisional SSIs are monitored for 30 days for all procedure categories
  2. B. The 90-day window applies to any cardiac, orthopedic or vascular procedure
  3. C. Hip prosthesis and knee prosthesis are on the 90-day list
  4. D. Colon surgery and cesarean section use the 30-day window
  5. E. Day 1 of the surveillance period is the procedure date
Reveal answer & rationale
Answer: A, C, D, E
The January 2026 NHSN chapter states that "superficial incisional SSIs are monitored for a 30-day period for all procedure categories" (A), so the 90-day window belongs only to deep incisional and organ-space events. Hip prosthesis and knee prosthesis are named on the 90-day list (C), which also includes breast surgery, cardiac surgery, coronary artery bypass graft, craniotomy, spinal fusion, open reduction of fracture, herniorrhaphy, pacemaker surgery, peripheral vascular bypass and ventricular shunt. Colon surgery and cesarean section are 30-day (D), as are appendectomy, cholecystectomy, hysterectomy and laparotomy. And day 1 is the procedure date (E). Option B is the common shorthand and it is too loose — the 90-day rule follows a named procedure list, not whole specialties, and it never applies to a superficial event.
Q3 Multiple choice
A patient bitten on the hand by a cat 6 hours ago has a deep puncture wound. Which is correct?
  1. A. Close the wound primarily to reduce scarring
  2. B. Irrigate and debride, leave the wound open, and start amoxicillin-clavulanate
  3. C. Observe without antibiotics unless the wound becomes red
  4. D. Close the wound and give a topical antibiotic only
Reveal answer & rationale
Answer: B
Deep puncture wounds and cat bites are not closed — "deep puncture wounds and those involving joint spaces should not be closed," and "cat bites are inherently high-risk and typically left open" (B). Amoxicillin-clavulanate "is the preferred prophylactic antibiotic," and the reason is the flora: bite wounds carry mixed aerobes and anaerobes, with Pasteurella multocida the commonest isolate from cats, so the beta-lactamase inhibitor is what makes the drug work. Options A and D close a wound that must stay open. Option C waits for a sign that arrives fast and late: cat bite infections "typically present within 12 to 18 hours after injury," and nearly a third of hand bites become infected. Tetanus status is checked at the same visit.
Q4 Multiple choice
A wound with purulent drainage needs culturing. Which technique is correct?
  1. A. Swab the purulent exudate on the wound surface before cleansing
  2. B. Cleanse with sterile normal saline first, then rotate the swab over a 1 cm-squared area with enough pressure to express fluid from the wound bed
  3. C. Rotate the swab in a zigzag pattern across the wound without touching the edges
  4. D. Swab only the wound margins, avoiding the wound bed
Reveal answer & rationale
Answer: B
That is the Levine technique, described in the study that validated it: the wound is first cleansed with normal saline (Open RN), and the technique "involves rotating the wound swab over a 1-cm(2) area of the wound," using its "ability to express fluid from the wound bed" (B). Option C describes the Z technique, which is the comparator — and the Levine technique "detected significantly more organisms than the Z technique," with the authors attributing the difference to its "ability to express fluid from the wound bed." Option A is the commonest real-world error: swabbing the pus on top cultures the surface, not the tissue. Option D samples the wrong site entirely.
Q5 Multiple choice
Which action reflects correct wound care?
  1. A. Sharply debriding a dry, intact eschar on the heel of a patient with no signs of infection
  2. B. Applying negative-pressure wound therapy over a necrotic wound to clean it up
  3. C. Leaving a dry, intact heel eschar alone because it acts as a biological covering
  4. D. Using wet-to-dry dressings as routine care on a granulating wound
Reveal answer & rationale
Answer: C
Debridement is contraindicated on "dry and intact eschars with no clinical evidence of underlying infection," and the source names the reason: the eschar's role as "a biological covering" (C). Option A does exactly what is contraindicated, and this rule agrees with the pressure-injury page. Option B violates an explicit NPWT contraindication — necrotic and devitalized tissue must be debrided first, alongside exposed vessels or bowel, untreated osteomyelitis, malignancy and unexplored fistulas. Option D misuses wet-to-dry, which is nonselective mechanical debridement that "removes both devitalized tissue and viable tissue" and is contraindicated where granulation tissue exceeds devitalized tissue — it is a debridement method with a narrow indication, not routine dressing care.

Common questions

What causes wound healing & wound infection?
Common causes and risk factors include diabetes mellitus — wound hypoxia, impaired angiogenesis, defective immunity, neuropathy-related reduced leukocyte infiltration, and markedly elevated matrix metalloproteases, so the wound digests its own new matrix, smoking — two separate mechanisms. nicotine "acts as a vasoconstrictor"; carbon monoxide binds hemoglobin far more avidly than oxygen and occupies the carrier. it also impairs neutrophil migration and fibroblast proliferation, malnutrition, each nutrient with a job: arginine for collagen deposition and neovascularization, glutamine for collagen maturity, vitamin c for the hydroxylation of proline to hydroxyproline, vitamin a for collagen and immune modulation, zinc as a dna and rna polymerase cofactor, magnesium and iron for collagen synthesis, corticosteroids — and the sourced counter is specific: vitamin a aids corticosteroid-induced impairment, bacterial burden the wound cannot clear — a colonized wound heals and an infected one does not, and the difference is quantity as much as species, and others.
What are the early signs of wound healing & wound infection?
Early findings include Warmth, redness and swelling in the first several days — this is normal, Beefy red, bleeding tissue in the wound bed — granulation.
Which findings should a nurse report immediately in wound healing & wound infection?
Report immediately: Increased bleeding or drainage at the incision around postoperative day 5 to 8, Separated wound edges — dehiscence, Abdominal organs visible through the wound — evisceration, Fever with significant erythema or cellulitis spreading from a wound, Dehiscence and evisceration, and others. These signal deterioration that needs rapid intervention.
Which surgical site infections get the 90-day surveillance window?
Only deep incisional and organ-space infections, and only after a specific named list of procedures. The commonly repeated version — "30 days, or 90 days for cardiac, orthopedic and vascular procedures" — is wrong in two ways. First, "superficial incisional SSIs are monitored for a 30-day period for all procedure categories," so there is no 90-day superficial event at all. Second, the 90-day rule follows a procedure list, not specialties: breast surgery, cardiac surgery, coronary artery bypass graft, craniotomy, spinal fusion, open reduction of fracture, herniorrhaphy, hip prosthesis, knee prosthesis, pacemaker surgery, peripheral vascular bypass surgery and ventricular shunt. Everything else is 30 days, including abdominal aortic aneurysm repair, limb amputation, appendectomy, cholecystectomy, colon surgery, cesarean section, hysterectomy, kidney transplant and exploratory laparotomy. Day 1 is the procedure date. One more detail worth carrying: spontaneous dehiscence is written into the deep incisional criterion, so a wound that opens on its own is both a complication and a reportable infection event.
What position should a patient with evisceration be placed in?
No source fetched for this page states a position, so this page does not teach one. The classic instruction is low Fowler's with knees flexed to reduce abdominal tension, and it may well be reasonable — but it is not in the evidence base assembled here, and inventing a position to fill the gap is exactly the habit this course avoids. What is sourced is this. For dehiscence: report it "immediately"; superficial dehiscence "can be managed with abdominal binders to reduce strain on the wound"; deep fascial dehiscence "is a surgical emergency and must be closed in the operating room." For evisceration: cover "with a sterile saline dressing until the herniating organs can be reduced back into the abdomen," and the patient "should be prepared for emergent abdominal exploration." The sourced tension-reducing measure is the abdominal binder — so if the question is how to take strain off the wound, that is the answer this evidence supports. Follow your unit's protocol for positioning, and know which part of what you are doing is guideline-backed and which is convention.
Why does dehiscence happen around postoperative day 5 to 8?
Because that is the structural low point of the healing timeline, and the timing is the mechanism. The inflammatory phase "usually lasts several days" and is ending by then. The proliferative phase has only just begun: "by days 5 through 7, the fibroblasts have started to lay down new collagen and glycosaminoglycans." So at day 5 to 8 the inflammatory scaffolding is resolving while the new collagen is still the thinnest it will ever be — and dehiscence typically occurs 5 to 8 days after surgery. Two consequences follow for practice. First, the warning sign at that point is "increased bleeding or drainage at the site," and the increase is the finding rather than its colour. Second, the weakness lasts far longer than that window: remodeling runs from around week 3… up to 12 months, maximal tensile strength arrives only "after about 11 to 14 weeks," and the scar reaches only "about 80% of the tensile strength" of the original tissue. That 80% ceiling is the sourced reason lifting restrictions outlast the stitches.

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.

Bookmark LearnDrugs.com?

Your saved pages are kept in this browser. Add LearnDrugs.com to your browser’s bookmarks to get back to them in one click.

Drag this link to your bookmarks bar: LearnDrugs.com

Or press Ctrl + D to bookmark the page you’re on.