What causes high Hematocrit and low RDW?

High Hematocrit and low RDW can be caused by many reasons.

If your Hematocrit is in between 40 % and 50 % and your RDW is in between 11.6 % and 14 % then you need not worry as these are the normal ranges for Hematocrit and RDW 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 Hematocrit : 40 - 50 %

Ideal values of Hematocrit depending on age :

Age	Ideal Hematocrit value
<5 years	40.712
5-10 years	41.437
10-15 years	42.175
15-20 years	42.926
20-25 years	43.69
25-30 years	44.468
30-35 years	45.26
35-40 years	46.066
40-45 years	46.886
45-50 years	47.721
50-55 years	48.57
55-60 years	49.435
60-70 years	49.419
70-80 years	49.404
80-90 years	49.388
90-100 years	49.372
>100 years	49.357

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

If you want your blood test report to be interpreted by Hematocrit specialist, then you can upload your report. Our Hematocrit 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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Hematocrit treatment - Click to read 10 GOLDEN ARTICLES on Anemia

Some examples of conditions that increase or decrease Hematocrit levels include:

• Damage to the bone marrow
• Kidney failure
• Excessive destruction of red blood cells
• Chronic inflammatory diseases
• Congenital heart disease

If you want your blood test report to be interpreted by Hematocrit specialist, you can upload your report. Our Hematocrit 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 RDW : 11.6 - 14 %

Ideal values of RDW depending on age :

Age	Ideal RDW value
<5 years	11.806
5-10 years	12.016
10-15 years	12.23
15-20 years	12.448
20-25 years	12.67
25-30 years	12.896
30-35 years	13.126
35-40 years	13.36
40-45 years	13.598
45-50 years	13.84
50-55 years	13.835
55-60 years	13.83
60-70 years	13.825
70-80 years	13.821
80-90 years	13.817
90-100 years	13.813
>100 years	13.809

High Hematocrit and low RDW can be caused by a lot of reasons. If you take Hematocrit and RDW blood tests and the results are higher than 50 % for Hematocrit and lower than 11.6 % for RDW, 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 Hematocrit and RDW Tests Are Done :

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

Medical References

• Cleveland Clinic – Hematocrit Test: What It Is, Levels, and High & Low Range
• Mayo Clinic – Hematocrit test
• MedlinePlus – Hematocrit Test