Tension pneumothorax — DipIMC MCQ
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Correct answer: D — Perform immediate chest decompression for suspected tension pneumothorax
Option D is correct because Haemodynamic instability with severe respiratory compromise after chest trauma is enough to treat tension pneumothorax clinically. Option C is less appropriate because oxygen may be supportive, but it does not address the defining time-critical problem first; option A is less appropriate because vascular access is useful, but it should not delay the immediate priority. Option B is less appropriate because it is plausible in a different scenario but suboptimal for the features described; option E is less appropriate because delay would increase clinical risk. Clinical pearl: in DipIMC-style questions, the best answer is the intervention that changes outcome earliest in the pre-hospital phase.
Reference: NICE Major Trauma NG39; JRCALC Guidelines