A 28-year-old woman is brought to the trauma bay after a fall from a 15-foot scaffold. On primary survey: airway patent, breathing spontaneous at 22/min with equal bilateral breath sounds, blood pressure 105/68 mmHg, heart rate 110/min, Glasgow Coma Scale 15/15. During secondary survey, the trauma team notes crepitus in the left anterolateral chest wall and decreased breath sounds on the left. Chest X-ray shows a pneumothorax on the left side with a small amount of subcutaneous emphysema. What is the most appropriate immediate management?

Explanation

## Management of Pneumothorax in Trauma **Key Point:** A haemodynamically stable trauma patient with a confirmed pneumothorax on imaging requires immediate tube thoracostomy (chest tube insertion), regardless of size, because tension physiology can develop acutely during positive-pressure ventilation or transport. ### Classification and Management of Pneumothorax in Trauma | Type | Presentation | Management | |---|---|---| | **Simple pneumothorax** (stable) | Confirmed on CXR, no respiratory distress | Tube thoracostomy | | **Tension pneumothorax** (unstable) | Hypotension, JVD, tracheal deviation, hypoxia | Needle decompression FIRST, then tube thoracostomy | | **Occult pneumothorax** (CT-only) | Not visible on CXR, found on CT | Observation if small and stable | **High-Yield:** In trauma, **all confirmed pneumothoraces require tube thoracostomy** because: 1. Risk of tension physiology developing during positive-pressure ventilation (intubation, bag-mask ventilation) 2. Air leak may increase during transport or during operative procedures 3. Observation alone is reserved for small, non-traumatic pneumothoraces in non-operative patients ### Why This Patient Needs Immediate Chest Tube 1. **Confirmed pneumothorax on CXR:** Not an occult finding; visible pneumothorax in trauma = tube thoracostomy 2. **Subcutaneous emphysema present:** Indicates ongoing air leak from lung parenchyma; observation risks tension physiology 3. **Haemodynamic stability does not change the decision:** Tension can develop acutely; prophylactic tube placement is standard of care 4. **Positive-pressure ventilation imminent:** If intubation required, pneumothorax will worsen without a chest tube **Clinical Pearl:** Needle decompression (2nd ICS, midclavicular line) is a **temporizing measure** for tension pneumothorax (hypotension + JVD + tracheal deviation), NOT for simple pneumothorax. This patient is haemodynamically stable with no signs of tension, so needle decompression is unnecessary and delays definitive management. **Mnemonic — Tube Thoracostomy Site:** **4–5 ICS, MAL** = **4th–5th Intercostal Space, Midaxillary Line** (anterior to latissimus dorsi, posterior to pectoralis major). Avoid the 2nd ICS (needle decompression only) and the 6th ICS (risk of diaphragm injury). ```mermaid flowchart TD A[Pneumothorax in Trauma]:::outcome --> B{Signs of Tension?}:::decision B -->|Yes: Hypotension, JVD, Tracheal deviation| C[Needle Decompression 2nd ICS MCL]:::urgent B -->|No: Haemodynamically stable| D[Tube Thoracostomy 4-5 ICS MAL]:::action C --> D D --> E[Confirm tube position on CXR]:::outcome ``` [cite:ATLS 10th Edition, Chapter 4: Thoracic Trauma; Sabiston Textbook of Surgery, Chapter 20: Trauma]