A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Vitamin K
Test Code36585
Alias/See Also
LAB1110
CPT Codes
84597
Preferred Specimen
1 mL frozen plasma collected in an EDTA (lavender-top) tube - protected from light
Patient Preparation
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.
Minimum Volume
0.5 mL
Other Acceptable Specimens
Frozen plasma collected in: Sodium heparin (green-top) tube - protected from light or lithium heparin (green-top) tube - protected from light • Frozen serum - protected from light
Instructions
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. Samples received frozen but not protected from light are acceptable.
If unable to centrifuge immediately, sample should be covered with aluminum foil immediately and placed on ice until plasma or serum can be separated from cells. Transport plasma or serum to the laboratory frozen.
If unable to centrifuge immediately, sample should be covered with aluminum foil immediately and placed on ice until plasma or serum can be separated from cells. Transport plasma or serum to the laboratory frozen.
Transport Container
Amber transport tube
Transport Temperature
Frozen
Specimen Stability
Room temperature: 24 hours
Refrigerated: 24 hours
Frozen: 90 days
Refrigerated: 24 hours
Frozen: 90 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic • Received room temperature • Received refrigerated
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Mon-thurs, sat
Report Available
4-6 days
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 Nichols Institute-Chantilly VA |
14225 Newbrook Drive |
Chantilly, VA 20151-2228 |