Minimising factitious hyperkalaemia
- 19 July 1997
- Vol. 315 (7101) , 190
- https://doi.org/10.1136/bmj.315.7101.190a
Abstract
# Samples should be centrifuged after collection in general practices {#article-title-2} Editor—The advice given by J D Johnston and S W Hawthorne on how to minimise factitious hyperkalaemia in blood samples from patients in general practice is misleading and potentially dangerous.1 We agree that samples should never be refrigerated, but it is not safe to assume that plasma potassium concentrations will remain unchanged when samples are left at room temperature. One of us (PWM) showed that in hot weather potassium concentrations may be falsely low in the first few hours after collection if blood samples are …Keywords
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