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Salicylate poisoning with mixed acid-base disorder — SCE Acute Medicine MCQ

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HardToxicology and OverdoseSalicylate poisoning with mixed acid-base disorderSCE Acute Medicine

A 19-year-old woman presents after ingesting aspirin. She is vomiting, tinnitus is present, RR 32, pH 7.49, PaCO2 2.9 kPa, bicarbonate 18 mmol/L and salicylate level is high. She is alert and creatinine is normal. What is the most appropriate next step in management?

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Correct answer: DStart intravenous sodium bicarbonate for urinary alkalinisation and seek toxicology advice

Salicylate poisoning produces mixed respiratory alkalosis and metabolic acidosis; urinary alkalinisation with IV sodium bicarbonate enhances elimination in significant poisoning. Suppressing respiratory compensation can precipitate severe acidaemia and CNS salicylate entry. Acetylcysteine is for paracetamol poisoning. Serial salicylate levels, electrolytes and acid-base status are essential.

Reference: TOXBASE salicylate poisoning, BNF