What causes high FT3 thyroid and low RDW CV?

High FT3 thyroid and low RDW CV can be caused by many reasons.

If your FT3 thyroid is in between 2.3 pg/mL and 4.2 pg/mL and your RDW CV is in between 11.6 % and 14 % then you need not worry as these are the normal ranges for FT3 thyroid and RDW CV 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 FT3 thyroid levels include:

• Thyroiditis
• A non-functioning thyroid gland
• Autoimmune disease
• Diabetes
• Liver disease

Normal range of FT3 thyroid : 2.3 - 4.2 pg/mL

Ideal values of FT3 thyroid depending on age :

Age	Ideal FT3 thyroid value
<5 years	2.385
5-10 years	2.473
10-15 years	2.564
15-20 years	2.659
20-25 years	2.757
25-30 years	2.859
30-35 years	2.964
35-40 years	3.073
40-45 years	3.186
45-50 years	3.304
50-55 years	3.426
55-60 years	3.552
60-70 years	3.683
70-80 years	3.819
80-90 years	3.96
90-100 years	4.106
>100 years	4.101

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

Normal range of RDW CV : 11.6 - 14 %

Ideal values of RDW CV depending on age :

Age	Ideal RDW CV value
<5 years	12.028
5-10 years	12.472
10-15 years	12.932
15-20 years	13.409
20-25 years	13.904
25-30 years	13.885
30-35 years	13.866
35-40 years	13.847
40-45 years	13.828
45-50 years	13.809
50-55 years	13.791
55-60 years	13.772
60-70 years	13.753
70-80 years	13.734
80-90 years	13.716
90-100 years	13.697
>100 years	13.678

High FT3 thyroid and low RDW CV can be caused by a lot of reasons. If you take FT3 thyroid and RDW CV blood tests and the results are higher than 4.2 pg/mL for FT3 thyroid and lower than 11.6 % for RDW CV, 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 FT3 thyroid and RDW CV Tests Are Done :

If your doctor wants FT3 thyroid and RDW CV tests on you, you may need to go through these tests. During the FT3 thyroid and RDW CV 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 FT3 thyroid and RDW CV Test reports by your pathologist.

Medical References

• MedlinePlus – Triiodothyronine (T3) Tests
• Cleveland Clinic – Triiodothyronine (T3) Test: What It Is, Function & Levels
• MedlinePlus – T3 test
• WebMD – T3 Tests: T3 Uptake Levels, Common Thyroid Conditions, and More
• NIH – How to interpret thyroid function tests