Gray top (Fluoride/heparin) tube
2.0 mL (minimum 0.2 mL)
Cause for rejection:
Specimen not received on ice, specimen not delivered to lab within 2 hours of collection.
Daily, 24 hours; STAT
Enzymatic, colorimetric method
Patient should not exercise 30 minutes prior to collection. Try to collect sample without using a tourniquet. If this is not possible, apply a tourniquet for no longer than 3 minutes. Do not instruct patient to clench and unclench fist to pump" the vein. Place specimen on ice and deliver to lab immediately."
OC Power Word:
reference range: 0.5-2.2 mmol/L