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Prothrombin Time (PT) With INR

The Prothrombin Time (PT) with INR test measures how long your blood takes to clot in response to an external injury like a cut on your finger.  The longer it takes your blood to clot, the greater your risk of excessive bleeding, even from minor injuries.  Prothrombin time is measured in seconds, while the INR is a standardized value that allows for the comparison of results from different labs that may use different instruments to perform the test.

This test may provide insight if you are concerned about having a bleeding disorder.  It is also used to monitor anticoagulant therapy with warfarin, assess liver health, and monitor vitamin K deficiency.

$49.00
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Test Details

This test includes the following:

  • Prothrombin Time (PT)
  • INR (International Normalized Ratio)

 

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FAQs

WHO SHOULD GET THIS TEST?

The Prothrombin Time (PT) with INR test is useful for any consumer with concerns about a possible bleeding disorder, liver health, or a vitamin K deficiency.  Doctors may request this test prior to scheduled surgical procedures to ensure that patients are not at risk for excessive bleeding.  This test is also important for consumers monitoring anticoagulant therapy with warfarin.

WHY IS THIS TEST IMPORTANT?

The process of blood clotting starts with an injury, which creates a domino effect of reactions in your body known as the “coagulation cascade.”  The end result of these reactions is  the formation of a clot at the site of injury that stops you from bleeding.  

This test is important because if blood clots too quickly, you may be at risk for the formation of dangerous blood clots that can lead to a stroke or heart attack.  However, if blood clots too slowly, you may be at risk for excessive bleeding, even from small injuries.  

This test is also particularly important for those taking blood thinners such as warfarin, because it helps monitor how well the medication is working by ensuring that your blood is clotting at a safe, controlled rate.

AM I REQUIRED TO FAST?

No.  Fasting is not required prior to this test.

WHAT KIND OF SAMPLE IS REQUIRED?

This test requires a blood sample.

WHAT DO I NEED TO DO TO PREPARE?

No additional preparation is required before taking this test.  However, drinking plenty of water prior to any blood draw procedure is recommended.

IS A DOCTOR’S ORDER REQUIRED?

No.  We do accept physician’s orders, or we can provide a doctor’s order for this test at no additional cost.

DO I NEED TO MAKE AN APPOINTMENT?

No.  You can walk in for same-day testing.  We make it easy by offering work-friendly store hours.

HOW LONG WILL IT TAKE TO GET MY RESULTS?

Results are typically available within 1-3 business days after the lab receives your sample.

IF I HAVE QUESTIONS ABOUT MY RESULTS, WHO SHOULD I CONTACT?

We recommend that you share your results with your healthcare provider.

OTHER RELEVANT TESTS

If you are interested in this panel, you may also want to consider:

  • Activated Partial Thromboplastin Time (aPTT)
  • Complete Blood Count
  • Hepatic Function Panel
  • Pre-Operative Panel