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Carbon monoxide poisoning in pregnancy — RCPSC EM MCQ

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HardToxicologyCarbon monoxide poisoning in pregnancyRCPSC EM

A pregnant 30-year-old woman is found unconscious after using a charcoal grill indoors. She has headache, vomiting, carboxyhaemoglobin 24%, lactate 3.8 mmol/L, and fetal heart rate decelerations. What is the most appropriate next step?

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

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Correct answer: EHigh-flow oxygen and urgent hyperbaric oxygen consultation

Pregnancy and loss of consciousness are high-risk features in carbon monoxide poisoning. High-flow oxygen is immediate therapy, and hyperbaric consultation is appropriate because fetal haemoglobin binds CO avidly.

Reference: Undersea and Hyperbaric Medical Society guidance; Canadian toxicology practice