High Prothrombin Time

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Prothrombin time (PT) is a blood test that measures the time it takes for the liquid portion (plasma) of your blood to clot.

See also: Partial thromboplastin time (PTT)

Alternative Names

PT; Pro-time; Anticoagulant-prothrombin time

How the test is performed

The health care provider uses a needle to take blood from one of your veins. The blood collects into an airtight container. You may be given a bandage to stop any bleeding. If you are taking a medicine called heparin, you will be...

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