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Protime/INR Evaluation & Treatment
Prothrombin time (Protime or PT) is a blood test that measures how long it takes blood to clot. A Prothrombin time test can be used to check for bleeding problems. PT is also used to check whether medicine such as Warfarin (Coumadin) to prevent blood clots is working.
INR (International Normalized Ratio) stands for a way of standardizing the results of Prothrombin time tests, no matter the testing method.
There are five factors needed for the blood to clot. The PT/INR test checks to see if all five factors are present for your blood to clot. An abnormal PT is often caused by liver disease or injury or by treatment with blood thinners.
Prothrombin time (PT) is measured to:
The frequency of testing and the dosage of medication will vary depending on your PT/INR results. Your doctor will monitor and instruct you after each test result.