Potassium, Whole Blood


Sunquest Code:KW  
Epic Code:LAB3579Epic Name:Potassium Whole Blood
Methodology:Direct ion selective electrode
CPT Code:84132
Turnaround Time:Performed and reported 24 hours/day.
Special Instructions:UMMC Only: Arterial or venous blood collected in a dry lithium heparin syringe for blood gas or ionized calcium analysis may be used for sodium, potassium or glucose analysis simultaneously.


Collection Instructions

Specimen:Arterial Blood
Optimal Volume:1 mL
Minimum\Peds Volume:0.2 mL (tuberculin syringe)
Container:Dry heparin syringe (Capillary (lithium heparin) gas tube, Green (lithium heparin, gel), Green (lithium heparin) on ICE, Green (sodium heparin, no gel))
Collection Instructions:Do not allow patient to clench/unclench hand. Must be delivered to the laboratory within 2 hours of collection. Plasma samples are acceptable if processed within 2 hours of collection.


Processing and Shipping

Specimen Processing:Whole blood. Do not process. Do not store.
Test Performed at or Referral Lab Chemistry  (UMMC-East Bank, UMMC/UMMCH-West Bank, UMMC NICU)


Interpretive

Critical Range:Less than 2.7 mmol/L and greater than 6.0 mmol/L
Reference Range:0-11 mo: 3.2-6.0 mmol/L; 1 y and older: 3.4-5.3 mmol/L. Serum values may be 0.1-0.2 mmol/L greater than plasma or whole blood values.
Use:Evaluate potassium metabolism.


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