A prothrombin time (PT) test measures the amount of time it takes for your blood plasma to clot. Prothrombin, also known as factor II, is just one of many plasma proteins involved in the clotting ...

Recently, another modified one-stage method, developed by Owren, 7 has been given the distinctive name of thrombotest. Claims have been made that this test is more satisfactory for controlling ...

The one-stage method was carried out on several hundred subjects to find the limits of variation in nonhypoprothrombinemic states. As representative samples, the results on 12 normal subjects studied ...