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What is a FACTOR V FUNCTIONAL?

Factor V Functional is a blood test that measures the activity of Factor V, a protein essential for normal blood clotting. It helps determine whether Factor V is functioning adequately to support clot formation. The test is needed to investigate unexplained or prolonged bleeding, abnormal clotting test results, or suspected Factor V deficiency. It may also help distinguish inherited Factor V deficiency from acquired conditions affecting coagulation.

Additional Information

Also known as/ Other names: Factor V Activity, Functional Factor V Assay, Coagulation Factor V Functional, Factor V Functional Assay, Proaccelerin Activity Test
Parameters: 1
Recommended for: M/F/Others
Sample Type: Blood
Patient Preparation: Overnight fasting is preferred. It is recommended that the patient discontinues heparin for 1 day and oral anticoagulants for 7 days prior to sampling as these drugs may affect test results. Discontinuation should be with prior consent from the treating physician.
Reports: 2 Days

FAQs

What does a low Factor V activity level mean?

A low result indicates reduced Factor V activity. It may occur due to inherited Factor V deficiency or acquired conditions such as liver disease or consumption of clotting factors.

Is Factor V deficiency inherited?

Yes. Congenital Factor V deficiency, sometimes called parahemophilia, is an inherited bleeding disorder. However, reduced Factor V can also develop due to acquired medical conditions.

Can liver disease affect Factor V levels?

Certainly. Factor V is produced in the liver, so significant liver dysfunction can reduce Factor V production and affect coagulation results.

Can vitamin K deficiency lower Factor V?

Factor V is different from the vitamin K-dependent clotting factors. Vitamin K deficiency primarily affects factors such as II, VII, IX, and X rather than directly reducing Factor V.

Is Factor V Functional the same as a PT or aPTT test?

No. PT and aPTT are screening tests that assess broader parts of the coagulation system, while the Factor V Functional test specifically measures Factor V activity.

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