Max K+ Infusion Rate Peripheral — FRCA Primary MCQ

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HardPhysiology - Endocrine & MetabolicMax K+ Infusion Rate PeripheralFRCA Primary

For severe hyperkalaemia with ECG changes, what volume of 10% calcium chloride does Resuscitation Council UK recommend when available?

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Correct answer: D — 10 mL intravenously over five minutes

The best answer is “10 mL intravenously over five minutes”. For severe hyperkalaemia with ECG changes, Resuscitation Council UK recommends 10 mL of 10% calcium chloride intravenously over five minutes when it is available. Calcium antagonises myocardial membrane excitability; it does not lower total body potassium, so shifting and removal therapies are also required.

Reference: Resuscitation Council UK, Special circumstances guidelines: https://www.resus.org.uk/professional-library/2025-resuscitation-guidelines/special-circumstances-guidelines