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Vitamin K1 : 36585
Test CodeVK1Q or 36585
Alias/See Also
Vitamin K
CPT Codes
84597
Instructions
Fasting for a minimum of 8 hours required. Patient should refrain from eating liver and taking multivitamins or vitamin K at least 24 hours before sample collection.
Transport Container
Preferred:
1 mL (0.5 mL minimum) frozen plasma collected in an EDTA (lavender-top) tube, protected from light
Acceptable:
Frozen serum protected from light
OR
Frozen plasma collected in a sodium or lithium heparin (green-top) tube, protected from light
Centrifuge within 1 hour of collection. Immediately separate plasma or serum from the cells into an amber transport tube to protect from light. Freeze. Do not thaw.
1 mL (0.5 mL minimum) frozen plasma collected in an EDTA (lavender-top) tube, protected from light
Acceptable:
Frozen serum protected from light
OR
Frozen plasma collected in a sodium or lithium heparin (green-top) tube, protected from light
Centrifuge within 1 hour of collection. Immediately separate plasma or serum from the cells into an amber transport tube to protect from light. Freeze. Do not thaw.
Transport Temperature
Frozen.
Specimen Stability
Room temperature: 24 hours; Refrigerated: 24 hours; Frozen: 90 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis,grossly lipemic
Methodology
Chromatography/Mass Spectrometry
Setup Schedule
Monday-Thursday, Saturday
Report Available
3-4 days (From receipt at performing laboratory)
Reference Range
130-1500 pg/mL
Clinical Significance
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.
Performing Laboratory
Quest Diagnostics
