A 72-year-old woman with severe COPD (FEV₁ 18% predicted) and hypercapnic respiratory failure is admitted to the ICU. After 5 days of non-invasive ventilation failure, she requires intubation and mechanical ventilation. The intensivist plans a tracheostomy to facilitate weaning and reduce sedation requirements. On postoperative day 14, she develops purulent drainage from the stoma with erythema and induration of the surrounding skin. Culture grows Staphylococcus aureus (MRSA). The tube is in good position and cuff pressure is normal. What is the most appropriate next step?

Explanation

## Clinical Analysis **Key Point:** Tracheostomy site infection (stomatitis) is managed conservatively with local wound care and systemic antibiotics while maintaining the airway — tube removal is contraindicated in an ICU patient still requiring mechanical support. ### Diagnosis: Tracheostomy Site Infection (Stomatitis) The clinical features are diagnostic: - **Timing:** Day 14 (established tracheostomy, not acute tube-related injury) - **Signs:** Purulent drainage, erythema, induration — classic cellulitis - **Culture:** MRSA — common nosocomial pathogen in ICU settings - **Tube position & cuff pressure:** Normal — rules out mechanical injury ### Pathophysiology Stomatitis occurs when: 1. Bacterial colonization of the stoma (common in ICU patients) 2. Breakdown of local skin barrier from tube friction and moisture 3. Inadequate stoma hygiene or dressing changes 4. Immunosuppression (age, critical illness, COPD) ### Management Algorithm ```mermaid flowchart TD A[Tracheostomy site infection: purulent drainage + cellulitis]:::outcome --> B{Patient still on mechanical ventilation?}:::decision B -->|Yes| C[Keep tube in place]:::action B -->|No| D[Consider tube removal if clinically stable]:::action C --> E[Local wound care: saline irrigation, dressing changes]:::action E --> F[Systemic antibiotics: cover MRSA]:::action F --> G[Vancomycin or linezolid IV]:::action G --> H[Monitor for improvement over 48-72 hours]:::action H --> I[Reassess for tube removal when weaned]:::outcome D --> J[Remove tube, allow stoma to close]:::action ``` ### Treatment Protocol | Intervention | Details | | --- | --- | | **Local care** | Saline irrigation 2–3 times daily; remove old dressing; apply topical antibiotic ointment (mupirocin) | | **Systemic antibiotics** | Vancomycin 15–20 mg/kg IV Q8–12H (target trough 15–20 μg/mL) for MRSA; linezolid alternative | | **Tube management** | Keep in place; do NOT remove — patient requires ongoing mechanical ventilation | | **Monitoring** | Daily wound assessment; repeat culture if no improvement in 72 hours | | **Prevention** | Daily dressing changes; keep stoma dry; minimize tube movement | **High-Yield:** Tracheostomy site infection is **NOT an indication for immediate tube removal** in ventilator-dependent patients. Removal would necessitate re-intubation, increasing morbidity. **Clinical Pearl:** MRSA stomatitis in ICU patients is common and usually responds well to vancomycin + local care within 3–5 days. Persistent infection warrants imaging to rule out deeper neck space involvement. **Warning:** Do NOT confuse stomatitis (superficial infection, manageable) with **tracheal stenosis** (structural complication, presents later) or **mediastinitis** (life-threatening, requires surgical drainage). ### Differential Diagnosis: Why Other Options Fail | Complication | Presentation | Management | | --- | --- | --- | | **Stomatitis (correct)** | Day 7–14; purulent drainage, cellulitis; tube position normal | Keep tube; antibiotics + local care | | **Tracheal stenosis** | Week 2–4 and beyond; progressive stridor; tube position may be abnormal | Imaging (CT/bronchoscopy); tube repositioning or dilation | | **Mediastinitis** | Fever, chest pain, hemodynamic instability; subcutaneous emphysema | Surgical drainage; tube removal | | **Tube obstruction** | Acute stridor/hypoxia; tube blocked by secretions | Suction; tube repositioning | [cite:Stell and Maran's Textbook of Head and Neck Surgery and Oncology Ch 28; Intensive Care Medicine Textbook]