What causes high APTT and low Thrombin Time?

High APTT and low Thrombin Time can be caused by many reasons.

If your APTT is in between 22 seconds and 35 seconds and your Thrombin Time is in between 0 sec and 23 sec then you need not worry as these are the normal ranges for APTT and Thrombin Time 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 APTT : 22 - 35 seconds

Ideal values of APTT depending on age :

Age	Ideal APTT value
<5 years	22.391
5-10 years	22.788
10-15 years	23.192
15-20 years	23.604
20-25 years	24.023
25-30 years	24.449
30-35 years	24.883
35-40 years	25.325
40-45 years	25.775
45-50 years	26.233
50-55 years	26.699
55-60 years	27.173
60-70 years	27.655
70-80 years	28.146
80-90 years	28.646
90-100 years	29.154
>100 years	29.671

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

If you want your blood test report to be interpreted by APTT specialist, then you can upload your report. Our APTT 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 APTT levels include:

• Liver disease
• Vitamin K abnormality
• Decreased or defective factor I (fibrinogen), II (prothrombin), V or X
• Hemophilia A and hemophilia B
• Willebrand disease

If you want your blood test report to be interpreted by APTT specialist, you can upload your report. Our APTT 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 range of Thrombin Time : 0 - 23 sec

Ideal values of Thrombin Time depending on age :

Age	Ideal Thrombin Time value
<5 years	1.018
5-10 years	1.036
10-15 years	1.054
15-20 years	1.073
20-25 years	1.092
25-30 years	1.111
30-35 years	1.131
35-40 years	1.151
40-45 years	1.171
45-50 years	1.192
50-55 years	1.213
55-60 years	1.235
60-70 years	1.257
70-80 years	1.279
80-90 years	1.302
90-100 years	1.325
>100 years	1.349

High APTT and low Thrombin Time can be caused by a lot of reasons. If you take APTT and Thrombin Time blood tests and the results are higher than 35 seconds for APTT and lower than 0 sec for Thrombin Time, 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 APTT and Thrombin Time Tests Are Done :

If your doctor wants APTT and Thrombin Time tests on you, you may need to go through these tests. During the APTT and Thrombin Time 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 APTT and Thrombin Time Test reports by your pathologist.