What causes high RDW SD and low Total serum iron?

High RDW SD and low Total serum iron can be caused by many reasons.

If your RDW SD is in between 39 fL and 46 fL and your Total serum iron is in between 40 mcg/dL and 190 mcg/dL then you need not worry as these are the normal ranges for RDW SD and Total serum iron 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	39.691
5-10 years	40.394
10-15 years	41.11
15-20 years	41.838
20-25 years	42.579
25-30 years	43.333
30-35 years	44.101
35-40 years	44.882
40-45 years	45.677
45-50 years	45.662
50-55 years	45.648
55-60 years	45.634
60-70 years	45.62
70-80 years	45.605
80-90 years	45.591
90-100 years	45.577
>100 years	45.563

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

Normal range of Total serum iron : 40 - 190 mcg/dL

Ideal values of Total serum iron depending on age :

Age	Ideal Total serum iron value
<5 years	40.709
5-10 years	41.43
10-15 years	42.164
15-20 years	42.911
20-25 years	43.671
25-30 years	44.445
30-35 years	45.233
35-40 years	46.035
40-45 years	46.851
45-50 years	47.681
50-55 years	48.526
55-60 years	49.386
60-70 years	50.261
70-80 years	51.152
80-90 years	52.058
90-100 years	52.98
>100 years	53.919

High RDW SD and low Total serum iron can be caused by a lot of reasons. If you take RDW SD and Total serum iron blood tests and the results are higher than 46 fL for RDW SD and lower than 40 mcg/dL for Total serum iron, 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 Total serum iron Tests Are Done :

If your doctor wants RDW SD and Total serum iron tests on you, you may need to go through these tests. During the RDW SD and Total serum iron 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 Total serum iron 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