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DoctorS
DoctorS, Doctor
Category: Health
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Experience:  MD, 30 years of medical practice
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My prothrombine time (pt) inr is 0.9 what does this mean

Resolved Question:

my prothrombine time (pt) inr is 0.9 what does this mean exactly
Submitted: 9 years ago.
Category: Health
Expert:  DoctorS replied 9 years ago.

DearCustomer

Prothrombin time (PT) is a measure of the time it takes your blood to clot and the INR (International Normalized Ratio) is a ratio that is based on your PT that should be 1 in a regular person who is not on blood thinners. A value of 0.9 is normal if you are not on blood thinners.

Here are two links with more information:

http://www.labtestsonline.org/understanding/analytes/pt/test.html

http://www.nlm.nih.gov/medlineplus/ency/article/003652.htm

Please let me know if you have more questions.

DrS

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