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Coagulation Factor VII Activity Assay
Test CodeF7
Alias/See Also
Factor VII
Preferred Specimen
1 mL platelet poor sodium citrate plasma
Minimum Volume
0.5 mL
Instructions
Submission of platelet poor plasma is critical to accurate results. Contact laboratory for further information.
Transport Container
Plastic vial
Transport Temperature
Frozen
Specimen Stability
Frozen 14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis, gross lipemia, gross icterus
Report Available
2-4 days
Reference Range
Adults: 65-180%
Clinical Significance
Factor VII is a vitamin K-dependent serine protease synthesized in the liver. It is a component of the extrinsic coagulation scheme, measured by the prothrombin time. Plasma biological half-life is about 3 to 6 hours. Deficiency may result in a bleeding diathesis.