A patient with dyspnea and subcutaneous emphysema after needle decompression of a pneumothorax does not improve with repeat decompression. The recommended management is:

• A. Intubation of the right mainstem
• B. Insertion of a chest tube on the affected side
• C. Repeat needle decompression with a larger gauge needle
• D. Observation and supplemental oxygen only

Answer: (A)

When a tension pneumothorax has been treated with needle decompression but symptoms persist, the air trapped in the pleural space needs to be definitively removed with a chest tube (tube thoracostomy) on the affected side. Needle decompression is a temporary, emergency measure; if the patient remains dyspneic and has subcutaneous emphysema after a second attempt, that indicates ongoing air leakage and continued lung collapse. A chest tube provides a controlled, ongoing drainage pathway, allows lung re-expansion, and relieves the mediastinal shift that compromises venous return and cardiac output.

Intubating into the right mainstem would not resolve the pneumothorax and could worsen gas exchange by ventilating only one lung while the other remains collapsed. Repeating needle decompression or simply observing with oxygen would not adequately treat the persistent tension pneumothorax. The definitive, appropriate step is placing a chest tube on the affected side.