What causes high INR and low APTT?

High INR and low APTT can be caused by many reasons.

If your INR is in between 0.9 ratio and 1.2 ratio and your APTT is in between 22 seconds and 35 seconds then you need not worry as these are the normal ranges for INR and APTT respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Normal range of INR : 0.9 - 1.2 ratio

Ideal values of INR depending on age :
Age Ideal INR value
<5 years 0.95
5-10 years 1.003
10-15 years 1.059
15-20 years 1.118
20-25 years 1.181
25-30 years 1.177
30-35 years 1.173
35-40 years 1.17
40-45 years 1.167
45-50 years 1.163
50-55 years 1.159
55-60 years 1.155
60-70 years 1.152
70-80 years 1.149
80-90 years 1.145
90-100 years 1.141
>100 years 1.138

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

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

Click here to know Symptoms of High INR

Click here to know Symptoms of Low APTT

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

Normal range of INR found among women : - ratio

Ideal values of APTT depending on age :
Age Ideal APTT value
<5 years 23.232
5-10 years 24.533
10-15 years 25.907
15-20 years 27.358
20-25 years 28.89
25-30 years 30.508
30-35 years 32.216
35-40 years 34.02
40-45 years 33.913
45-50 years 33.807
50-55 years 33.701
55-60 years 33.595
60-70 years 33.489
70-80 years 33.384
80-90 years 33.28
90-100 years 33.176
>100 years 33.072

Click here to know Symptoms of High INR

Click here to know Symptoms of Low APTT

Click here to upload your blood test report

Click here to consult a doctor for your Low INR problem

High INR and low APTT can be caused by a lot of reasons. If you take INR and APTT blood tests and the results are higher than 1.2 ratio for INR and lower than 22 seconds for APTT, your physician may recommend more tests to figure out the problem. You might also get these tests if your physician thinks you have some other disease.

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How the INR and APTT Tests Are Done :

If your doctor wants INR and APTT tests on you, you may need to go through these tests. During the INR and APTT blood tests, a pathologist will put a needle into your veins and take out a small quantity of blood. A pathologist is a physician in the medical field who thoroughly studies the causes and effects of disease. Within a few hours you will get your INR and APTT Test reports by your pathologist.

Click here to upload your blood test report

Click here to consult a doctor for your Low INR problem

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