What does high Prothrombin time and INR mean in blood test?

High Prothrombin time and INR can be caused by numerous problems.

High levels of Prothrombin time and INR in the blood indicate a variety of health problems. If your blood Prothrombin time level is between 12 seconds to 16 seconds and the INR level is between 0.9 seconds to 1.2 ratio, then your body does not have any underlying health problems. But if Prothrombin time and INR levels exceed these levels, you should see a doctor immediately.

Normal Prothrombin time range : 12 - 16 seconds

Age-wise ideal Prothrombin time level in blood:
Age Ideal Prothrombin time value
<5 years 12.165
5-10 years 12.332
10-15 years 12.501
15-20 years 12.673
20-25 years 12.847
25-30 years 13.024
30-35 years 13.203
35-40 years 13.384
40-45 years 13.568
45-50 years 13.754
50-55 years 13.943
55-60 years 14.135
60-70 years 14.329
70-80 years 14.526
80-90 years 14.726
90-100 years 14.928
>100 years 15.133

If you want your blood test report to be interpreted by Prothrombin time specialist, then you can upload your report. Our Prothrombin time expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

Your Prothrombin time result may be wrong. Click to know the reason in detail

Click here to know Symptoms of High Prothrombin time

Click here to know Symptoms of High INR

Besides Lab test failures, there are many other reasons for inaccurate blood results. Know the common reasons for inaccurate blood test results

Normal INR range : 0.9 - 1.2 ratio

Age-wise ideal INR level in blood:
Age Ideal INR value
<5 years 0.912
5-10 years 0.925
10-15 years 0.938
15-20 years 0.951
20-25 years 0.964
25-30 years 0.977
30-35 years 0.99
35-40 years 1.004
40-45 years 1.018
45-50 years 1.032
50-55 years 1.046
55-60 years 1.06
60-70 years 1.075
70-80 years 1.09
80-90 years 1.105
90-100 years 1.12
>100 years 1.135

Click here to know Symptoms of High Prothrombin time

Click here to know Symptoms of High INR

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High Prothrombin time and INR levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 16 seconds for Prothrombin time and more than 1.2 ratio for INR, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a Prothrombin time and INR test. In most hospitals Prothrombin time and INR results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.

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