Which of the following findings is a sign that prompts immediate action in tension pneumothorax?

• A. Deviation of the trachea to the contralateral side
• B. Normal breath sounds on both sides
• C. Equal chest expansion
• D. Stable blood pressure

Answer: (A)

Tracheal deviation to the opposite side is the sign that most urgently indicates a tension pneumothorax. In this condition, air builds up under pressure in the pleural space, collapsing the affected lung and pushing the mediastinum away from that side. That mediastinal shift compresses the heart and great vessels, cutting down venous return and rapidly producing shock. Because this life-threatening physiology can deteriorate quickly, it demands immediate decompression rather than waiting for tests or additional assessment.

The other findings described wouldn’t prompt that same urgent action: normal breath sounds on both sides suggest ventilation is not severely compromised; equal chest expansion implies symmetric movement rather than a unilateral collapse; stable blood pressure indicates the patient isn’t in shock yet.