The<unk>  <unk>  – along with its derived measures of<unk>  ratio (PR) and international normalized ratio <unk>  – is an assay for evaluating the extrinsic pathway and common pathway of coagulation. This blood test is also called<unk> <unk>  and<unk> /INR. They are used to determine the clotting tendency of blood, in such things as the measure of warfarin dosage, liver damage, and vitamin K status.<unk>  measures the following coagulation factors: I (fibrinogen), II<unk> , V (proaccelerin), VII (proconvertin), and X (Stuart–Prower factor).<unk>  is often used in conjunction with the activated partial thromboplastin time (aPTT) which measures the intrinsic pathway and common pathway of coagulation.
Prothrombin time
Thrombin time
Activated clotting time
Partial thromboplastin time
Kaolin clotting time
Ecarin clotting time
Reptilase time
Fibrin degradation product