What causes high APTT and low Bilirubin direct?

High APTT and low Bilirubin direct can be caused by many reasons.

If your APTT is in between 22 seconds and 35 seconds and your Bilirubin direct is in between 0 mg/dL and 0.2 mg/dL then you need not worry as these are the normal ranges for APTT and Bilirubin direct 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	22.378
5-10 years	22.763
10-15 years	23.155
15-20 years	23.553
20-25 years	23.958
25-30 years	24.37
30-35 years	24.789
35-40 years	25.215
40-45 years	25.649
45-50 years	26.09
50-55 years	26.539
55-60 years	26.995
60-70 years	27.459
70-80 years	27.931
80-90 years	28.411
90-100 years	28.9
>100 years	29.397

*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 Bilirubin direct : 0 - 0.2 mg/dL

Ideal values of Bilirubin direct depending on age :

Age	Ideal Bilirubin direct value
<5 years	0.11189
5-10 years	0.11381
10-15 years	0.11577
15-20 years	0.11776
20-25 years	0.11979
25-30 years	0.12185
30-35 years	0.12395
35-40 years	0.12608
40-45 years	0.12825
45-50 years	0.13046
50-55 years	0.1327
55-60 years	0.13498
60-70 years	0.1373
70-80 years	0.13966
80-90 years	0.14206
90-100 years	0.1445
>100 years	0.14699

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

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