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Test Code K Potassium

Methodology

Ion-Selective Electrode (ISE)

Performing Laboratory

St. Clair Hospital Laboratory

Specimen Requirements

Sample Type:   

  • Serum (free from hemolysis and gross lipemia, collected by standard venipuncture technique).
  • Plasma: Use only Li-heparin.
  • Urine: Urine samples for ISE (Na, K, Cl) do not require a preservative.  It is acceptable
    to analyze 24 hour urine collections for ISE when they are collected with 10 gm Boric Acid or 25 mL of 50% Acetic Acid as a preservative.

•    Fluid samples (upon request) will be run for sodium, potassium and/or chloride.  (Test codes: NAFL, KFL, CLFL).  No Reference ranges will be provided.   

 

 

Reference Values

3.5 – 5.0 mmol/L

Day(s) Test Set Up

Monday through Sunday

Critical Values

<2.9 mmol/L or >6.1 mmol/L