An indirect measure of the proteins produced by the liver which will help with blood clotting. This is an example of a true liver function test.
Measurement of plasma clotting time.
a test that measures blood coagulation ability. Prothrombin is a protein produced by the liver that facilitates blood clotting. See also coagulation factor.
A type of test to measure various clotting factors in blood.
laboratory test that measures the clotting of blood in seconds; abnormally increased PT signifies bleeding risk due to deficient synthesis of clotting proteins.
a test that measures the blood’s clotting ability Back to previous page
A clotting test, the prothrombin time is done to test the integrity of part of the clotting scheme. The prothrombin time is commonly used as a method of monitoring the accuracy of blood thinning treatment (anticoagulation) with COUMADIN. Familiarly called the "pro time," the test is the time needed for clot formation after a substance called thromboplastin (+ calcium) has been added to plasma. See the entire definition of Prothrombin time
the time it takes prothrombin, a clotting chemical, to clot the blood
The prothrombin time (PT) and its derived measures of prothrombin ratio (PR) and international normalized ratio (INR) are measures of the extrinsic pathway of coagulation. They are used to determine the clotting tendency of blood, in the measure of warfarin dosage, liver damage and vitamin K status. The reference range for prothrombin time is usually around 12-15 seconds; the normal range for the INR is 0.8-1.2.
