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TTP — RCPSC IM MCQ

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

HardHematologyTTPRCPSC IM

A patient with chronic kidney disease has a potassium result of 6.4 mmol/L from a visibly hemolyzed sample. They feel well, ECG is normal and a repeat non-hemolyzed sample is being obtained immediately. What is the best next step?

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

Reveal the answer and explanation

Correct answer: A — Confirm repeat potassium before emergency therapy and ECG review

Explanation lettering: B = shown as A · E = shown as B · D = shown as C · A = shown as D · C = shown as E

B is correct: in a stable patient without ECG changes, a hemolyzed sample requires urgent confirmation to avoid treating pseudohyperkalemia. C and D may cause harm. E and A do not resolve diagnostic uncertainty.

Reference: Emergency Care BC, Hyperkalemia: https://emergencycarebc.ca/clinical_resource/clinical-summary/hyperkalemia-diagnosis-and-treatment/