What causes high RDW SD and low MCV?

High RDW SD and low MCV can be caused by many reasons.

If your RDW SD is in between 39 fL and 46 fL and your MCV is in between 83 fL and 101 fL then you need not worry as these are the normal ranges for RDW SD and MCV 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 RDW SD levels include:

• Thalassemia, an inherited blood disorder
• Crohn's disease
• Chronic liver disease
• An iron or vitamin deficiency
• Heart disease

RDW SD treatment - Click to read 10 GOLDEN ARTICLES on Anemia

Normal range of RDW SD : 39 - 46 fL

Ideal values of RDW SD depending on age :

Age	Ideal RDW SD value
<5 years	39.665
5-10 years	40.341
10-15 years	41.029
15-20 years	41.729
20-25 years	42.44
25-30 years	43.164
30-35 years	43.9
35-40 years	44.648
40-45 years	45.409
45-50 years	45.396
50-55 years	45.383
55-60 years	45.37
60-70 years	45.357
70-80 years	45.343
80-90 years	45.33
90-100 years	45.317
>100 years	45.304

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

Normal range of MCV : 83 - 101 fL

Ideal values of MCV depending on age :

Age	Ideal MCV value
<5 years	84.415
5-10 years	85.854
10-15 years	87.318
15-20 years	88.807
20-25 years	90.321
25-30 years	91.861
30-35 years	93.427
35-40 years	95.02
40-45 years	96.64
45-50 years	98.288
50-55 years	99.964
55-60 years	99.935
60-70 years	99.906
70-80 years	99.877
80-90 years	99.848
90-100 years	99.819
>100 years	99.79

High RDW SD and low MCV can be caused by a lot of reasons. If you take RDW SD and MCV blood tests and the results are higher than 46 fL for RDW SD and lower than 83 fL for MCV, 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 RDW SD and MCV Tests Are Done :

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

Medical References

• MedlinePlus – RDW (Red Cell Distribution Width)
• Cleveland Clinic – RDW Blood Test: What It Is, Procedure & Results
• NIH – RDW-SD is Superior to RDW-CV in Reflecting Liver Fibrosis Stage in Patients with Chronic Hepatitis B