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Vitamin K [36585X]Test Code
3 mL plasma collected in an EDTA (lavender-top) tube
Other Acceptable Specimens
Plasma collected in: Lithium heparin (green-top) tube
Separate and freeze immediately in plastic screw-cap vial. Wrap sample in foil before sending to lab. No disclaimer is required.
Note: Samples received frozen but not protected from light are acceptable. Samples received refrigerated but not protected from light are unaccpetable and should be rejected.
Plastic screw-cap vial protected from light
Room temperature: Unacceptable
Frozen: 90 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • Received refrigerated • Serum
High Performance Liquid Chromatography (HPLC)
Set up: Tues a.m.; Report available: 2 days
Vitamin K is a required co-factor for the synthesis of factors 2, 7, 9, and 10 and proteins C and S. Deficiencies of vitamin K lead to bleeding. Coumadin® (warfarin) acts as an anticoagulant because it is a vitamin K antagonist.
Quest Diagnostics Nichols Institute