What sign indicates a tension pneumothorax?

What sign indicates a tension pneumothorax?

• A. Bradycardia
• B. Hyperactive bowel sounds
• C. Constricted pupils
• D. Tracheal deviation away from affected side, hypotension, neck vein distension

Answer: (D)

Tension pneumothorax is an emergency where air trapped under pressure in the chest pushes the mediastinum to the opposite side, squeezing the heart and great vessels and cutting off venous return. The telltale sign is tracheal deviation away from the affected side, paired with hypotension from reduced cardiac preload and neck vein distension from the elevated intrathoracic pressure. This combination shows the lung collapse is not just partial but under high pressure, affecting both breathing and circulation. Other options aren’t aligned with this pathophysiology: bradycardia isn’t typical (patients usually become tachycardic from hypoxia and shock), hyperactive bowel sounds don’t relate to chest trauma, and constricted pupils don’t reflect the acute chest pressure and compromised circulation seen in tension pneumothorax. The key indicators—tracheal shift away, low blood pressure, and neck vein distension—directly point to the mediastinal shift and obstructed venous return that define a tension pneumothorax.

Tension pneumothorax is an emergency where air trapped under pressure in the chest pushes the mediastinum to the opposite side, squeezing the heart and great vessels and cutting off venous return. The telltale sign is tracheal deviation away from the affected side, paired with hypotension from reduced cardiac preload and neck vein distension from the elevated intrathoracic pressure. This combination shows the lung collapse is not just partial but under high pressure, affecting both breathing and circulation. Other options aren’t aligned with this pathophysiology: bradycardia isn’t typical (patients usually become tachycardic from hypoxia and shock), hyperactive bowel sounds don’t relate to chest trauma, and constricted pupils don’t reflect the acute chest pressure and compromised circulation seen in tension pneumothorax. The key indicators—tracheal shift away, low blood pressure, and neck vein distension—directly point to the mediastinal shift and obstructed venous return that define a tension pneumothorax.