Factor VII Activity (Prothrombin Complex Concentration)

What This Test Measures

Factor VII is a clotting factor produced by the liver. When you have low levels, it may increase your risk of bleeding, particularly after trauma, surgery, or certain medical conditions. This test is often used to guide treatment decisions for bleeding disorders or after liver disease or injury.

Why It’s Ordered

Your healthcare provider may order this test if you’ve experienced unexplained bleeding, have a history of easy bruising, or are undergoing treatment for conditions like liver disease, hemophilia, or after trauma. It can also be checked before surgeries or procedures to ensure safe clotting function.

Common Reasons for Testing

This test is typically drawn from **whole blood** using an anticoagulant to prevent clotting. The sample is processed to isolate the clotting factors, and activity is measured through a standardized clotting assay.

How the Test Works

No special preparation is usually needed, but you may be asked to avoid certain medications (like blood thinners) for a few days before testing. If you’re pregnant, have a bleeding disorder, or are on anticoagulants, discuss this with your provider first.