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Investigation of outpatients referred to a chemical pathologist with potential pseudohyperkalaemia
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    Serum or Plasma? Pseudohyperkalemia in a chronic lymphocytic leukemia patient

    Dear Editor:

    Kapoor et al. (1) investigated pseudohyperkalemia in outpatients and attributed many of the cases to hematological abnormalities or delay in specimen centrifugation or clotting. Plasma is often recommended as the preferred specimen in patients with leukocytosis, erythrocytosis or thrombosis (2). Potassium released from ruptured cells during the clotting process of serum specimens may result in false...

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    Conflict of Interest:
    None declared.