This is a test that measures the clotting time of plasma (the liquid portion of the blood). The PT (Prothrombin Time) is a broad screening test for many types of bleeding disorders. It evaluates blood clotting disorders, usually bleeding.
Most laboratories report PT results that have been adjusted to the INR (International Normalized Ratio) for people on warfarin.
Special Preparation: None.
More Detailed Protime (PT) Test Information