A 32-year-old man is brought to the emergency department following a high-speed motor vehicle collision. On arrival, he is conscious but agitated, with a respiratory rate of 28/min, heart rate of 118/min, and blood pressure of 94/62 mmHg. Examination reveals absent breath sounds on the left side, tracheal deviation to the right, and severe distress. What is the most appropriate immediate management during the primary survey?

Explanation

## Tension Pneumothorax Recognition and Management **Key Point:** Tension pneumothorax is a clinical diagnosis requiring immediate intervention without waiting for imaging confirmation. The classic triad of absent breath sounds, tracheal deviation, and hypotension with respiratory distress is pathognomonic. **High-Yield:** In the primary survey (Airway, Breathing, Circulation), life-threatening thoracic injuries must be identified and treated immediately. Tension pneumothorax is a "treat first, confirm later" emergency. **Clinical Pearl:** The patient's presentation—tachypnea (28/min), tachycardia (118/min), hypotension (94/62), tracheal deviation, and unilateral absent breath sounds—is classic for tension pneumothorax. This is a Class I emergency in ATLS. ### Management Algorithm ```mermaid flowchart TD A[Trauma patient with respiratory distress]:::outcome A --> B{Absent breath sounds + tracheal deviation + hypotension?}:::decision B -->|Yes| C[Clinical diagnosis: Tension pneumothorax]:::outcome C --> D[Needle decompression immediately]:::action D --> E[14-16G needle, 2nd ICS midclavicular line]:::action E --> F[Chest tube insertion after decompression]:::action B -->|No| G[Continue primary survey]:::action ``` **Procedure:** Needle decompression is performed using a 14–16 gauge needle inserted at the 2nd intercostal space, midclavicular line on the affected side. This converts tension pneumothorax to simple pneumothorax, restoring hemodynamics. A chest tube (28–32 Fr) is then inserted at the 4th–5th ICS, anterior axillary line for definitive management. **Why Immediate Action?** Tension pneumothorax causes progressive cardiovascular collapse due to increased intrathoracic pressure compressing the heart and great vessels. Delay in decompression is fatal. [cite:ATLS 10th Edition, Chapter 4]