dehiscence

Definition of dehiscence

de-hisc--ence — Partial or total separation of previously approximated wound edges (failure of wound closure integrity)

1. Dehiscence is the partial or total separation of a surgically closed wound after operative closure, occurring most commonly 5-8 days postoperatively when healing is still in the early proliferative phase and tensile strength is at its lowest; it is classified by depth — superficial dehiscence involves skin layers only with the fascial layer (rectus sheath) remaining intact, while deep/fascial dehiscence involves all tissue layers and may progress to evisceration (extrusion of abdominal contents through the wound); the condition results from failure of the wound to achieve adequate tensile strength through collagen synthesis, and is precipitated by local factors (ischemia, hematoma, seroma, infection, poor closure technique) and systemic factors (diabetes, malnutrition, obesity, corticosteroid use, smoking, immunosuppression, advanced age); the classic clinical presentation is a sudden rush of serosanguineous fluid from an abdominal wound (“salmon-colored drainage”), accompanied by visible wound opening — a surgical emergency when the fascial layer is involved; the term dehiscence also applies beyond surgical wounds to traumatic wound repair breakdown and to obstetric wounds (cesarean, perineal), each with their own distinct ICD-10-CM code pathways.

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Etymology of dehiscence

latin • de-: Latin prefix = “apart, away, down, undoing.” • hisc-: Latin hiscere = “to open, to gape, to split apart” (inchoative form of hiare = “to yawn, to open wide”). • -ence: Latin -entia = “state or condition of.” • Literal: “The state of gaping open” or “the act of splitting apart.” • The same root hiscere gives botany its term for seed pod splitting (dehiscent fruits) and anatomy its use for any structure that opens or ruptures along a natural seam. The word entered English medical usage in the 17th century, first in botanical contexts describing the opening of anthers and seed capsules, then adopted into surgical literature to describe wound failure — a vivid image of a wound “yawning open” like a ripened pod.

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Classification Table

Type	Layers Involved	Clinical Significance
Superficial dehiscence	Skin/epidermis ± dermis only; fascia intact	Most common; manage with wound care, packing, secondary intention healing
Deep / fascial dehiscence	All layers through fascia	Surgical emergency; risk of evisceration; return to OR for repair
Evisceration	Full thickness + organ extrusion	True emergency; wet sterile dressing, NPO, emergent surgery
Cesarean wound dehiscence	Uterine incision or abdominal wound	Coded separately: O90.0 (uterine)
Perineal obstetric dehiscence	Episiotomy or perineal repair	Coded separately: O90.1
Traumatic wound repair disruption	Repaired laceration separation	Coded separately: T81.33XA/T81.33XD/T81.33XS
Amputation stump dehiscence	Stump closure breakdown	Coded separately: T87.81

Coding Context

ICD-10-CM — Surgical Wound Disruption (T81.3x — 7th character REQUIRED):

Code	Description
T81.30XA	Disruption of wound, unspecified, initial encounter
T81.30XD	Disruption of wound, unspecified, subsequent encounter
T81.30XS	Disruption of wound, unspecified, sequela
T81.31XA	Disruption of external operation (surgical) wound, NEC, initial encounter
T81.31XD	Disruption of external operation (surgical) wound, NEC, subsequent encounter
T81.31XS	Disruption of external operation (surgical) wound, NEC, sequela
T81.32XA	Disruption of internal operation (surgical) wound, NEC, initial encounter
T81.32XD	Disruption of internal operation (surgical) wound, NEC, subsequent encounter
T81.32XS	Disruption of internal operation (surgical) wound, NEC, sequela
T81.33XA	Disruption of traumatic injury wound repair, initial encounter
T81.33XD	Disruption of traumatic injury wound repair, subsequent encounter
T81.33XS	Disruption of traumatic injury wound repair, sequela

Obstetric Wound Dehiscence (separate code family):

Code	Description
O90.0	Disruption of cesarean delivery wound
O90.1	Disruption of perineal obstetric wound

Companion / Secondary Codes:

Code	Description
T81.4XXA	Infection following a procedure, initial encounter (when dehiscence is complicated by SSI)
T87.81	Dehiscence of amputation stump (excluded from T81.31)
L89.XXX	Pressure ulcer (if dehiscence leads to chronic wound)

Causes and Risk Factors

• Local/surgical: Ischemia at wound edges, hematoma, seroma, infection (SSI), poor closure technique, excessive tension, inadequate undermining
• Metabolic: diabetes mellitus, malnutrition (low albumin/prealbumin), vitamin C deficiency, zinc deficiency
• Mechanical: Increased abdominal pressure (coughing, vomiting, ileus, straining), trauma to wound site, premature suture removal
• Pharmacologic: Chronic corticosteroid use, immunosuppressants, chemotherapy agents, anticoagulants affecting hemostasis
• Patient factors: Obesity (BMI >30), smoking/nicotine use (vasoconstriction), advanced age (reduced collagen synthesis), radiation to wound site, prior scarring
• Connective tissue: Ehlers-Danlos syndrome, Marfan syndrome (fascial laxity and poor suture holding)

Related Terms

• evisceration: Full-thickness dehiscence with extrusion of abdominal organs through wound — surgical emergency; wet sterile dressing, NPO, emergent OR
• surgical site infection (SSI): Most common precipitant of wound dehiscence; coded T81.4XXA
• secondary intention healing: Wound left open to granulate from base; management strategy for superficial dehiscence
• negative pressure wound therapy (NPWT): VAC therapy applied to open dehisced wound to accelerate granulation; HCPCS 97605/97606
• debridement: Removal of devitalized tissue from dehisced wound bed; CPT 97597/97598
• evisceration (ocular): Unrelated; removal of intraocular contents — distinct surgical term
• wound disruption: Synonymous ICD-10-CM tabular language for dehiscence (T81.3x header uses “disruption”)
• seroma: Fluid collection under wound; predisposes to dehiscence
• hematoma: Blood collection under wound; predisposes to dehiscence
• granulation tissue: Vascular connective tissue filling dehisced wound during secondary healing

Clinical Details

Assessment: Inspect wound daily; classic warning sign is serosanguineous “salmon-pink” drainage from abdominal wound; probe depth of opening; assess for fascial integrity (do NOT probe deeply in awake patient without preparation for possible evisceration); check for fever, leukocytosis (underlying SSI) Symptoms: Visible wound opening, increased drainage, pain at incision site, serosanguineous discharge, fever if infected; sudden gush of fluid signals fascial dehiscence Management: Superficial → wound care, wet-to-dry dressings or NPWT, secondary intention; Deep/fascial → emergent OR, secondary closure (13160/49900); Evisceration → sterile saline-soaked gauze, NPO, emergent surgery Timing: Peak risk days 5-8 postop; early (1-3 days) = technical failure; late (>10 days) = metabolic/infectious cause

One-Sentence Summary Dehiscence (Latin de- + hiscere, “to gape open”; T81.31XA/T81.31XD, coded with required 7th character for encounter type) is the partial or total separation of a surgically closed wound most commonly occurring days 5-8 postoperatively from ischemia, infection, or metabolic failure; managed by wound care and secondary intention for superficial cases or emergent surgical re-closure (13160/49900) for fascial/eviscerating dehiscence.

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DERIVATIONS of dehiscence

TABLE definition AS Definition 
WHERE length(filter(roots, (word) => econtains([[dehiscence]].roots, word))) > 0 AND file.name != [[dehiscence]].file.name
SORT file.name ASC

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Query

TABLE definition AS Definition
FROM #medroot
WHERE length(filter(definition, (word) => econtains([[dehiscence]].definition, word))) > 0 AND file.name != [[dehiscence]].file.name

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Med roots dictionary Appendix A Prefixes Appendix B Combining Forms Appendix C Suffixes Appendix D Suffix forms