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Potassium, Plasma or Serum
Test Code2082
Alias/See Also
K
Preferred Specimen
One 4 mL plasma separator tube or serum separator tube.
Minimum Volume
1 mL plasma or serum at 2-8°C. (Min: 0.2 mL) Submit specimen in an ARUP Standard Transport Tube.
Instructions
Patient should avoid exercise of arm or hand before or during collection.
Transport Temperature
1 mL plasma or serum at 2-8°C. (Min: 0.2 mL) Submit specimen in an ARUP Standard Transport Tube.
Specimen Stability
After separation from cells: Ambient: 2 weeks; Refrigerated: 2 weeks; Frozen: 6 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolyzed specimens. Specimens collected in sodium fluoride or potassium oxalate, citrate or EDTA.
Methodology
Ion-Selective Electrode
Setup Schedule
Sun-Sat
Report Available
Within 24 hours
Limitations
Allow serum to clot completely at room temperature. Separate serum or plasma from cells ASAP.
