What causes high APTT and low Platelet count?

High APTT and low Platelet count can be caused by many reasons.

If your APTT is in between 22 seconds and 35 seconds and your Platelet count is in between 150 thou/uL and 450 thou/uL then you need not worry as these are the normal ranges for APTT and Platelet count 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	22.375
5-10 years	22.756
10-15 years	23.144
15-20 years	23.538
20-25 years	23.939
25-30 years	24.347
30-35 years	24.762
35-40 years	25.184
40-45 years	25.613
45-50 years	26.049
50-55 years	26.493
55-60 years	26.944
60-70 years	27.403
70-80 years	27.87
80-90 years	28.345
90-100 years	28.828
>100 years	29.319

*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 Platelet count : 150 - 450 thou/uL

Ideal values of Platelet count depending on age :

Age	Ideal Platelet count value
<5 years	152.555
5-10 years	155.153
10-15 years	157.795
15-20 years	160.482
20-25 years	163.215
25-30 years	165.995
30-35 years	168.822
35-40 years	171.697
40-45 years	174.621
45-50 years	177.595
50-55 years	180.619
55-60 years	183.695
60-70 years	186.823
70-80 years	190.005
80-90 years	193.241
90-100 years	196.532
>100 years	199.879

High APTT and low Platelet count can be caused by a lot of reasons. If you take APTT and Platelet count blood tests and the results are higher than 35 seconds for APTT and lower than 150 thou/uL for Platelet count, 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 Platelet count Tests Are Done :

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