Hyperkalaemia peri-arrest — DipIMC MCQ
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Correct answer: B — Calcium chloride IV according to local protocol
Option B is correct because ECG changes with suspected hyperkalaemia require urgent IV calcium to stabilise the myocardium. Option D is less appropriate because that dose is an ALS cardiac-arrest dose and is unsafe for this non-arrest indication; option A is less appropriate because aspirin is useful in ACS but inappropriate for this presentation. Option E is less appropriate because untitrated opioid dosing can cause avoidable hypotension or respiratory depression; option C is less appropriate because steroids have delayed onset and should not replace the immediate treatment. Clinical pearl: in DipIMC-style questions, the best answer is the intervention that changes outcome earliest in the pre-hospital phase.
Reference: Resuscitation Council UK Guidelines