What causes high Bilirubin indirect and low APTT?

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

If your Bilirubin indirect is in between 0.1 mg/dL and 1 mg/dL and your APTT is in between 22 seconds and 35 seconds then you need not worry as these are the normal ranges for Bilirubin indirect and APTT respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Some examples of conditions that can increase or decrease Bilirubin levels include:

• Gallstones present in the bile ducts
• Hepatitis A, hepatitis B, hepatitis C
• Scarring of the bile ducts
• Lack of oxygen (hypoxia)
• Liver disease

Bilirubin indirect treatment - Click to read 10 GOLDEN ARTICLES on Liver health

Normal range of Bilirubin indirect : 0.1 - 1 mg/dL

Ideal values of Bilirubin indirect depending on age :

Age	Ideal Bilirubin indirect value
<5 years	0.1012
5-10 years	0.10241
10-15 years	0.10364
15-20 years	0.10488
20-25 years	0.10614
25-30 years	0.10741
30-35 years	0.1087
35-40 years	0.11
40-45 years	0.11132
45-50 years	0.11266
50-55 years	0.11401
55-60 years	0.11538
60-70 years	0.11676
70-80 years	0.11816
80-90 years	0.11958
90-100 years	0.12101
>100 years	0.12246

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

Normal range of APTT : 22 - 35 seconds

Ideal values of APTT depending on age :

Age	Ideal APTT value
<5 years	22.264
5-10 years	22.531
10-15 years	22.801
15-20 years	23.075
20-25 years	23.352
25-30 years	23.632
30-35 years	23.916
35-40 years	24.203
40-45 years	24.493
45-50 years	24.787
50-55 years	25.084
55-60 years	25.385
60-70 years	25.69
70-80 years	25.998
80-90 years	26.31
90-100 years	26.626
>100 years	26.946

High Bilirubin indirect and low APTT can be caused by a lot of reasons. If you take Bilirubin indirect and APTT blood tests and the results are higher than 1 mg/dL for Bilirubin indirect 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 Bilirubin indirect and APTT Tests Are Done :

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

Medical References

• Cleveland Clinic – Bilirubin Test: Understanding High vs. Low Levels & Causes
• Mayo Clinic – Bilirubin test
• MedlinePlus – Bilirubin Blood Test
• WebMD – Bilirubin Test: High vs. Low Levels, Direct vs. Indirect
• NIH – Physiology, Bilirubin