Clinical Lab Handbook

Container/Tube: Serum or plasma

Specimen Volume: 3.5 or 5 mL

Transport Temperature: Refrigerated

Collection Instructions:

• Centrifuge specimens and remove the serum or plasma from the cellular material within 4 hours of collection.
• Every effort should be made to fill vacuum tubes completely 

Enzymatic Endpoint

22-30 mmol/L

Critical values (automatic call-back): <10 mmol/L or >40 mmol/L

Monday through Sunday

Available STAT

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