Which finding on exam would raise concern for a tension pneumothorax?

• A. Hypotension with unilateral diminished breath sounds, tracheal deviation, JVD, or severe respiratory distress
• B. Normal blood pressure with clear lungs
• C. Bilateral equal breath sounds with muffled heart sounds
• D. Hypotension with bilateral normal breath sounds

Answer: (D)

Tension pneumothorax is an emergency where air accumulates in the pleural space and cannot escape, causing rising intrathoracic pressure that compresses the lung and shifts the mediastinum. This pressure impairs venous return to the heart, leading to shock and signs of severe distress.

The exam finding that raises strong concern is hypotension accompanied by unilateral diminished or absent breath sounds, along with tracheal deviation away from the affected side, distended neck veins, and severe respiratory distress. The unilateral change in breath sounds reflects the collapse or compression of the affected lung, while the tracheal shift and JVD show the mediastinal compression and impaired venous return caused by the pressure buildup.

In contrast, hypotension with bilateral normal breath sounds would not fit the picture of a tension pneumothorax, since the presence of tension typically alters breath sounds on the affected side and produces other specific signs of airway and circulatory compromise.