A 68-year-old male with COPD and cor pulmonale is admitted with acute exacerbation requiring mechanical ventilation. After 3 weeks of intubation, he develops difficulty with weaning. A tracheostomy is planned. Which is the most common late complication of tracheostomy?

Explanation

## Most Common Late Complication of Tracheostomy ### Definition of Timing Late complications of tracheostomy occur **>1 week after tube placement**, typically weeks to months after the procedure. ### Tracheal Stenosis — The Most Common Late Complication **Key Point:** Tracheal stenosis is the most frequent late complication of tracheostomy, occurring in 1–11% of patients depending on tube duration and cuff pressure management. **Mechanism:** 1. Prolonged cuff pressure (>25 cm H₂O) causes mucosal ischemia 2. Fibroblast proliferation and collagen deposition 3. Circumferential scar formation narrows the tracheal lumen 4. Typically develops 2–8 weeks post-tracheostomy, but can be delayed months to years **Clinical Pearl:** The stenosis usually occurs at the **cuff site** (most common) or at the **stoma site**. Patients present with progressive dyspnea, stridor, or difficulty with decannulation. **High-Yield:** Risk factors include: - Prolonged intubation (>2 weeks) - High cuff pressure (>25 cm H₂O) - Tube size mismatch - Repeated intubations - Diabetes, renal failure, steroid use ### Why Other Options Are Not Most Common | Complication | Timing | Frequency | Notes | | --- | --- | --- | --- | | **Tracheal stenosis** | Late (2–8 weeks) | **Most common** | Cuff-related ischemia | | Tracheoinnominate artery fistula | Very early–early (3–6 days) | Rare (0.5–1%) | Life-threatening but uncommon | | Subglottic stenosis | Late | Rare | Usually follows prolonged translaryngeal intubation, not tracheostomy | | Tracheal granulation | Early (days–weeks) | Common but benign | Usually regresses with proper care | **Warning:** Do not confuse **early complications** (bleeding, tube obstruction, accidental decannulation, subcutaneous emphysema) with **late complications**. The question asks specifically about late complications. ### Prevention of Tracheal Stenosis 1. Keep cuff pressure <25 cm H₂O (or use low-pressure cuff) 2. Minimize tube duration 3. Use appropriately sized tube 4. Regular cuff pressure monitoring 5. Consider percutaneous tracheostomy (smaller tube, less trauma) **Clinical Pearl:** Once stenosis develops, management is challenging — options include serial dilation, laser therapy, or surgical resection with end-to-end anastomosis.