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Potassium, Serum
Test CodeKK
Preferred Specimen
Serum, 0.5 mL minimum
Instructions
Spin within 2 hours of collection. Hemolysis causes significant interference
Transport Container
SST tube
Transport Temperature
Unspun specimen stable for 2 hours room temp., spun specimen stable for 4 days if refrigerated
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross Hemolysis, Not spun within 2 hours of collection
Reference Range
See report for normal ranges. Critical Values: <3.0 or >6.0 mg/dL
Clinical Significance
Evaluate electrolyte intolerance. Potassium measurements are useful in monitoring electrolyte balance in the diagnosis and treatment of disease conditions characterized by low or high blood potassium levels