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Coagulation Factor IX Activity Assay
Test CodeF9
Alias/See Also
Factor IX
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: 65-140%
Clinical Significance
Congenital deficiency inherited as an X-linked recessive bleeding disorder (hemophilia B). Severe deficiency (<1%) characterized by hemarthroses, deep tissue bleeding, excessive bleeding with trauma and ecchymoses. Acquired deficiency associated with liver disease, vitamin K deficiency, warfarin therapy and inhibitors (rare).
