What causes high APTT and low RBC?

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

If your APTT is in between 22 seconds and 35 seconds and your RBC is in between 4.5 mil/uL and 5.5 mil/uL then you need not worry as these are the normal ranges for APTT and RBC 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	22.374
5-10 years	22.755
10-15 years	23.142
15-20 years	23.536
20-25 years	23.936
25-30 years	24.343
30-35 years	24.757
35-40 years	25.178
40-45 years	25.606
45-50 years	26.042
50-55 years	26.485
55-60 years	26.936
60-70 years	27.394
70-80 years	27.86
80-90 years	28.334
90-100 years	28.816
>100 years	29.306

*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 RBC : 4.5 - 5.5 mil/uL

Ideal values of RBC depending on age :

Age	Ideal RBC value
<5 years	4.577
5-10 years	4.655
10-15 years	4.734
15-20 years	4.815
20-25 years	4.897
25-30 years	4.98
30-35 years	5.065
35-40 years	5.151
40-45 years	5.239
45-50 years	5.328
50-55 years	5.419
55-60 years	5.417
60-70 years	5.415
70-80 years	5.413
80-90 years	5.411
90-100 years	5.409
>100 years	5.407

High APTT and low RBC can be caused by a lot of reasons. If you take APTT and RBC blood tests and the results are higher than 35 seconds for APTT and lower than 4.5 mil/uL for RBC, 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 RBC Tests Are Done :

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