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Tension pneumothorax — RCPSC EM MCQ

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EasyTraumaTension pneumothoraxRCPSC EM

A 40-year-old motorcyclist arrives after blunt chest trauma. BP is 82/48, HR 140, SpO2 is 86%, trachea is deviated right, left hemithorax is hyperresonant, and breath sounds are absent on the left. What is the most likely diagnosis?

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Correct answer: D — Left tension pneumothorax

Unilateral absent breath sounds, hyperresonance, hypoxia, shock and tracheal deviation after trauma indicate tension pneumothorax, requiring immediate decompression.

Reference: ACLS/ATLS/PALS principles adapted to Canadian ED practice