Hemolysis raises the potassium concentration after release of potassium within erythrocytes. This increase can be corrected for.
Parameters:
(1) measured potassium in mmol/L in the hemolyzed specimen
(2) free hemoglobin in g/L
corrected potassium in mmol/L =
= (measured potassium) - (0.3 * (free hemoglobin))
where:
• 0.3 is the mmol of potassium seen per g/L hemoglobin. Values in the literature range from 0.25 to 0.33 (see Table 6, page 1809, Jay and Provasek (1993).
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Specialty: Clinical Laboratory, Obstetrics & Gynecology, Cardiology, Emergency Medicine, Critical Care
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