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POTASSIUM, serum (087-0463)
Test Mnemonic:

K
Methodology:

Potentiometric
Performed:

Clinical Chemistry
Turnaround Time:

Routine: 8 hours; ASAP: 4 hours; STAT: 1 hour
Specimen Requirements: Patient Preparation: Patient should avoid any exercise of the arm or hand before or during collection.

Collect: 7 mL of blood in SST (gel barrier) or red-topped tube. (Min.: 3 mL of blood)

Specimen Preparation: Allow specimen to clot completely at room temperature. Centrifuge to separate serum from cells within 2 hours of collection. Transfer serum from collection tube to labeled plastic transport tube.   

Storage/Transport:  Delivered to Sample Management within 2 hours of collection.

Stability: Room temperature for ≤6 weeks, refrigerated for ≤6 weeks, and frozen for ≤1 year. (Avoid repeated freeze/thaw cycles).  

Causes for Rejection:  Incomplete and/or incorrect sample identification, improper storage/transport, and gross hemolysis or lipemia.                                                      
Clinical Information:

If applicable, state clinical information that is required to be provided with specimen.
Reference Range:

By report (reports may vary based on instrumentation, patient age and sex)
CPT 4 Code:

84132
  Reviewed by Tho Nguyen, MT (ASCP)  7/11/13

When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient.  Components of the organ or disease panels may be ordered individually.  The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-9 code or its verbal equivalent.
   
 

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