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Primary spontaneous pneumothorax — RCPSC EM MCQ

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EasyRespiratory emergenciesPrimary spontaneous pneumothoraxRCPSC EM

CTAS 3: A tall 21-year-old has sudden pleuritic chest pain and mild dyspnoea. Vitals are BP 124/76, HR 88, RR 18, SpO2 98% on room air. CXR shows a small apical pneumothorax. He is comfortable and has no underlying lung disease. What is the most appropriate next step?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: B — Observe with repeat imaging and discharge if stable

A small uncomplicated primary spontaneous pneumothorax in a stable patient can be managed conservatively with observation, repeat imaging and clear return precautions.

Reference: Canadian respiratory emergency practice; British Thoracic Society pneumothorax guidance