What causes high RDW SD and low D Dimer?

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

If your RDW SD is in between 39 fL and 46 fL and your D Dimer is in between 0 ug/mL and 0.51 ug/mL then you need not worry as these are the normal ranges for RDW SD and D Dimer 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 RDW SD : 39 - 46 fL

Ideal values of RDW SD depending on age :

Age	Ideal RDW SD value
<5 years	39.683
5-10 years	40.378
10-15 years	41.085
15-20 years	41.805
20-25 years	42.537
25-30 years	43.282
30-35 years	44.04
35-40 years	44.812
40-45 years	45.597
45-50 years	45.583
50-55 years	45.569
55-60 years	45.555
60-70 years	45.541
70-80 years	45.527
80-90 years	45.513
90-100 years	45.499
>100 years	45.485

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

If you want your blood test report to be interpreted by RDW SD specialist, then you can upload your report. Our RDW SD 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 RDW SD levels include:

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

If you want your blood test report to be interpreted by RDW SD specialist, you can upload your report. Our RDW SD 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 D Dimer : 0 - 0.51 ug/mL

Ideal values of D Dimer depending on age :

Age	Ideal D Dimer value
<5 years	0.112
5-10 years	0.114
10-15 years	0.116
15-20 years	0.118
20-25 years	0.12
25-30 years	0.122
30-35 years	0.124
35-40 years	0.126
40-45 years	0.128
45-50 years	0.13
50-55 years	0.132
55-60 years	0.134
60-70 years	0.136
70-80 years	0.138
80-90 years	0.14
90-100 years	0.142
>100 years	0.144

High RDW SD and low D Dimer can be caused by a lot of reasons. If you take RDW SD and D Dimer blood tests and the results are higher than 46 fL for RDW SD and lower than 0 ug/mL for D Dimer, 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 D Dimer Tests Are Done :

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