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Ethylene glycol poisoning — RCPSC EM MCQ

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HardToxicologyEthylene glycol poisoningRCPSC EM

A 37-year-old is confused after ingesting windshield-washer fluid. pH 7.08, anion gap 29, osmolar gap 42, creatinine 123 µmol/L, and urine microscopy shows calcium oxalate crystals. What is the most likely diagnosis?

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Correct answer: C — Ethylene glycol poisoning

High anion and osmolar gaps with calcium oxalate crystalluria indicate ethylene glycol toxicity.

Reference: Canadian poison centre guidance; toxic alcohol emergency standards