A 52-year-old man undergoes elective open cholecystectomy for symptomatic cholelithiasis. On postoperative day 5, the patient develops fever (38.5°C), localized erythema, warmth, and purulent discharge from the surgical wound. Wound culture is pending. What is the most appropriate immediate next step in management?

Explanation

## Clinical Scenario Analysis This patient has a **surgical site infection (SSI)** with clear signs of wound contamination (fever, erythema, purulent discharge) on postoperative day 5, which falls within the typical window for early SSI. ## Management Principles for Infected Surgical Wounds **Key Point:** The hallmark of surgical wound infection is the presence of pus and systemic signs (fever). Once diagnosed clinically, the wound MUST be opened and debrided — this is a surgical principle, not a medical one. **High-Yield:** Infected wounds require **surgical drainage and debridement**, not just antibiotics. Antibiotics alone cannot penetrate necrotic tissue or biofilm; mechanical removal is essential. ## Why Debridement is the Correct Next Step 1. **Immediate source control:** Purulent discharge indicates localized infection that must be drained. 2. **Removal of necrotic tissue:** Devitalized tissue harbors bacteria and prevents antibiotic penetration. 3. **Conversion to open wound:** Allows daily dressing changes, continued drainage, and eventual healing by secondary intention or delayed primary closure. 4. **Culture-guided therapy:** Wound culture obtained during debridement guides antibiotic selection. ## Wound Healing After Debridement ```mermaid flowchart TD A[Infected surgical wound<br/>with purulent discharge]:::outcome --> B{Surgical intervention?}:::decision B -->|Yes - Debride & drain| C[Remove necrotic tissue<br/>Leave wound open]:::action B -->|No - Antibiotics only| D[Infection spreads<br/>Systemic toxicity]:::urgent C --> E[Daily dressing changes<br/>Granulation tissue forms]:::action E --> F[Secondary healing or<br/>delayed primary closure]:::outcome ``` **Clinical Pearl:** The dictum "**Pus must be let out**" is foundational in surgery. Even with antibiotics, pus under tension will not resolve and risks cellulitis, sepsis, or abscess formation. ## Timeline Context | Postop Day | SSI Type | Typical Organism | Management | |---|---|---|---| | 1–5 | Early (acute) | *Staph aureus*, *Streptococcus* | Immediate debridement + antibiotics | | 5–30 | Delayed | Mixed (skin flora + anaerobes) | Debridement + culture-guided antibiotics | | >30 | Late | *Staph epidermidis*, fungi | Consider foreign body; debridement if indicated | **Tip:** Always open an infected wound surgically. Antibiotics are adjunctive, not primary therapy for established surgical site infection. [cite:Sabiston Textbook of Surgery 21e Ch 6]