KRBC – “Potassium – RBC”

Update to specimen requirements and stability.

Collect: Green sodium heparin AND Lavender EDTA 

Specimen Preparation: Send 4.0 mL whole blood in a screw capped plastic vial or in original collection tube, AND whole blood collected in Lavender EDTA tube. Both samples must be received for testing.

Stability:

Green sodium or lithium heparin
Room temperature: 72 hours
Refrigerated: 72 hours
Frozen: Unacceptable

Lavender EDTA
Room temperature: 48 hours
Refrigerated: 48 hours
Frozen: Unacceptable