A 58-year-old diabetic man with a 10-day-old surgical abdominal wound presents with dehiscence (partial separation of the incision). The wound edges are erythematous, with purulent drainage and surrounding cellulitis. Vital signs: temperature 38.5°C, heart rate 110/min. What is the most appropriate next step in management?

Explanation

## Infected Wound Dehiscence: Management Strategy **Key Point:** Infected dehiscence with systemic signs (fever, tachycardia) and purulent drainage requires urgent surgical intervention—debridement and re-closure—not conservative management. ### Clinical Assessment of This Case | Feature | Finding | Significance | |---------|---------|---------------| | **Timing** | 10 days post-op | Early dehiscence; high infection risk | | **Appearance** | Erythema + purulent drainage | Active infection present | | **Systemic signs** | Fever 38.5°C, HR 110 | Systemic inflammatory response | | **Comorbidity** | Diabetes | Impaired wound healing, immunocompromise | | **Diagnosis** | Infected dehiscence | Requires surgical intervention | ### Why Surgical Intervention Is Mandatory ```mermaid flowchart TD A[Wound dehiscence at day 10]:::outcome --> B{Signs of infection?}:::decision B -->|No fever, no purulence| C{Partial or complete?}:::decision B -->|Fever, purulence, cellulitis| D[Infected dehiscence]:::urgent C -->|Partial, clean| E[Conservative: dressing + observe]:::action C -->|Complete| F[Surgical re-closure]:::action D --> G[Urgent surgical exploration]:::action G --> H[Debride necrotic/infected tissue]:::action H --> I[Irrigate copiously]:::action I --> J{Infection controlled?}:::decision J -->|Yes| K[Re-close in layers]:::action J -->|No| L[Leave open, plan delayed closure]:::action ``` ### Pathophysiology of Infected Dehiscence 1. **Bacterial colonization** at the incision site (often S. aureus, E. coli, or anaerobes) 2. **Impaired collagen synthesis** in the proliferative phase (especially in diabetics) 3. **Enzymatic degradation** of collagen by bacterial proteases and neutrophil elastase 4. **Loss of wound integrity** → mechanical separation 5. **Systemic spread** if untreated → sepsis, necrotizing fasciitis **High-Yield:** At day 10, the wound is still in the **proliferative phase**. Collagen cross-linking is incomplete, making re-closure technically feasible if infection is controlled. Waiting >14 days risks progression to necrotizing infection and loss of re-closure opportunity. **Clinical Pearl:** Infected dehiscence with systemic signs is a surgical emergency. The presence of fever + purulence + cellulitis indicates bacterial invasion beyond the incision—conservative management will lead to sepsis and tissue necrosis. ### Why Immediate Surgery? - **Debridement removes infected/necrotic tissue** that antibiotics cannot penetrate - **Irrigation dilutes bacterial load** and removes foreign material - **Re-closure in layers** restores anatomic integrity and prevents further contamination - **Tissue viability assessment** is only possible under direct visualization - **Systemic signs** (fever, tachycardia) indicate infection has crossed the incision boundary **Mnemonic: FIRE** — **F**ever, **I**nfection, **R**equires **E**xploration (and debridement, re-closure)