skip to main content

Ethylene glycol poisoning — RCPSC EM MCQ

Instant feedback + full explanation. One question, done properly.

HardToxicologyEthylene glycol poisoningRCPSC EM

A 49-year-old man is confused after drinking windshield washer fluid. pH is 7.08, anion gap is 32, osmolar gap is elevated, creatinine is rising, and urine microscopy shows calcium oxalate crystals. What is the most appropriate investigation?

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

Reveal the answer and explanation

Correct answer: D — Serum toxic alcohol level with osmolar gap and renal assessment

Ethylene glycol assessment is supported by toxic alcohol levels where available, osmolar gap, acid-base status, renal function, and urine crystals. Treatment should not wait for a delayed level in severe toxicity.

Reference: Ontario Poison Centre guidance; toxicology practice