Name: Factor X Chromogenic Activity, Vitamin K Antagonist Therapy
Test Name: Factor X Chromogenic Activity, Vitamin K Antagonist Therapy
Health Link Test Code: RMISC
LIS Test Code: MISC
Testing Site: Testing will be sent to an approved reference laboratory
In-Lab Turnaround Time: 3 - 7 days.
Collection Container: Light blue top (3.2% NaCitrate)
Please indicate if patient is receiving anticoagulant (Warfarin/Heparin/Vitamin K antagonist), direct thrombin inhibitor or fibrinolytic agent therapy.
Collection Volume: 4 mL
Pediatric Collection Volume: 1.5 mL
Sample Analyzed: Plasma
Testing Volume: 1 mL
Pediatric Testing Volume: 0.5 mL
Centrifuge specimen to yield platelet poor plasma/serum (platelet count should be less than 10 K/µL). Separate plasma/serum and transfer to plastic tube or vial. Freeze plasma/serum at -20°C or below.
Outreach Specimen Processing:
Transport frozen aliquot on dry ice to UWHC Hospital Laboratory.
Transport whole blood specimen at room temperature to laboratory within 4 hours of collection. See Specimen Processing for instructions if transport criteria are not met.
Hemolyzed specimens, clotted specimens, partially filled tubes and whole blood specimens greater than 4 hours old when received by the laboratory are not acceptable.