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

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

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

Normal INR range : 0.9 - 1.2 ratio

Age-wise ideal INR level in blood:

Age	Ideal INR value
<5 years	0.978
5-10 years	1.063
10-15 years	1.155
15-20 years	1.146
20-25 years	1.137
25-30 years	1.129
30-35 years	1.12
35-40 years	1.111
40-45 years	1.102
45-50 years	1.198
50-55 years	1.189
55-60 years	1.18
60-70 years	1.171
70-80 years	1.163
80-90 years	1.154
90-100 years	1.145
>100 years	1.136

*Ideal values ​​are calculated based on our database of patient records

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

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Some examples of conditions that increase or decrease INR levels include:

• Liver disease
• Vitamin K abnormality
• Decreased or defective factor I (fibrinogen), II (prothrombin), V or X
• Hemophilia A and hemophilia B
• Autoantibody against a specific factor (e.g., factor VIII)

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

Normal Prothrombin time range : 12 - 16 seconds

Age-wise ideal Prothrombin time level in blood:

Age	Ideal Prothrombin time value
<5 years	13.042
5-10 years	14.174
10-15 years	15.404
15-20 years	15.288
20-25 years	15.173
25-30 years	15.059
30-35 years	14.945
35-40 years	14.832
40-45 years	14.72
45-50 years	15.998
50-55 years	15.878
55-60 years	15.758
60-70 years	15.639
70-80 years	15.521
80-90 years	15.404
90-100 years	15.288
>100 years	15.173

High INR and Prothrombin time 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 1.2 ratio for INR and more than 16 seconds for Prothrombin time, 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 INR and Prothrombin time test. In most hospitals INR and Prothrombin time 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.