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Prothrombin Time

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Overview of PROTHROMBIN TIME TEST

Prothrombin Time Test measures the time it takes for plasma to clot. This test is done to monitor and diagnose bleeding disorders.

What is PROTHROMBIN TIME TEST?

Prothrombin is one of the many plasma proteins involved in the blood clotting process, the prothrombin time test helps to monitor the clotting time of plasma, which is the liquid portion of blood. Prothrombin Time Test is a blood test.

Why is PROTHROMBIN TIME TEST suggested?

Prothrombin Time Test is suggested by the doctor for the following reasons:

  • There is a familial occurrence of hemophilia and other bleeding disorders.
  • To monitor liver function.
  • Diagnosis of Vitamin K deficiency.
  • To monitor warfarin and other blood thinner treatment.

How is PROTHROMBIN TIME TEST performed?

Prothrombin Time Test is performed as follows:

  • Blood is drawn from a vein in the forearm.
  • The sample is sent to a lab for testing.

What are the parameters measured in PROTHROMBIN TIME TEST?

Prothrombin Time Test is measured in seconds and the result is presented as INR ( International Normalized Ratio). For a normal person who isn’t on any blood thinning medication, the range is around 0.9 to 1.1. If a patient is on a blood thinner, blood will take longer to clot.

Preparation before performing PROTHROMBIN TIME TEST

Preparation before the Prothrombin Time Test:

  • Inform doctor of warfarin or any blood thinner you are on.

Post-care after PROTHROMBIN TIME TEST

No post-care is needed after the Prothrombin Time Test.

Sample types in PROTHROMBIN TIME TEST

Sample type in Prothrombin Time Test:

  • 0.5 ml – 2 ml of blood.

Side effects/risks of PROTHROMBIN TIME TEST

There are no side effects/ risks of Prothrombin Time Test.

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