Factor VII Activity Test

Factor VII activity testing is a functional (coagulation) test that measures the functional activity of coagulation factor VII (Factor Seven) in blood plasma, expressed as a percentage of normal activity. Factor VII is a vitamin K-dependent protein that plays a crucial role in the extrinsic pathway of blood clotting, where it combines with tissue factor to initiate the coagulation cascade. It is used to diagnose congenital or acquired factor VII deficiency.