What intervention uniquely prevents death in tension pneumothorax?

• A. Decompression of the chest
• B. Rapid IV fluids
• C. Bag-Valve Mask ventilation
• D. High-flow oxygen

Answer: (A)

When tension pneumothorax occurs, air trapped under pressure collapses the lung and compresses the heart and great vessels, severely reducing venous return and rapidly risking death. The intervention that directly stops this catastrophic pressure buildup is decompressing the chest, such as with needle thoracostomy followed by chest tube placement. By releasing the trapped air, the opposite lung can expand, the mediastinal structures shift back toward normal, and cardiac output improves promptly—exactly what’s needed to prevent death in this emergency.

High-flow oxygen helps with oxygenation but does not relieve the life-threatening pressure. Rapid IV fluids can support circulation but won’t fix the obstructive physiology and may worsen respiratory mechanics. Bag-valve mask ventilation can increase intrathoracic pressure and potentially worsen the problem. The key, life-saving action is chest decompression to promptly restore normal intrathoracic pressure and hemodynamics.