What causes high FT3 thyroid and low BUN Creatinine ratio?

High FT3 thyroid and low BUN Creatinine ratio can be caused by many reasons.

If your FT3 thyroid is in between 2.3 pg/mL and 4.2 pg/mL and your BUN Creatinine ratio is in between 5 Ratio and 15 Ratio then you need not worry as these are the normal ranges for FT3 thyroid and BUN Creatinine ratio 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	2.379
5-10 years	2.461
10-15 years	2.545
15-20 years	2.632
20-25 years	2.722
25-30 years	2.815
30-35 years	2.912
35-40 years	3.012
40-45 years	3.115
45-50 years	3.222
50-55 years	3.333
55-60 years	3.447
60-70 years	3.565
70-80 years	3.687
80-90 years	3.813
90-100 years	3.944
>100 years	4.079

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

Normal range of BUN Creatinine ratio : 5 - 15 Ratio

Ideal values of BUN Creatinine ratio depending on age :

Age	Ideal BUN Creatinine ratio value
<5 years	5.172
5-10 years	5.349
10-15 years	5.532
15-20 years	5.722
20-25 years	5.918
25-30 years	6.121
30-35 years	6.331
35-40 years	6.548
40-45 years	6.773
45-50 years	7.005
50-55 years	7.245
55-60 years	7.494
60-70 years	7.751
70-80 years	8.017
80-90 years	8.292
90-100 years	8.576
>100 years	8.87

High FT3 thyroid and low BUN Creatinine ratio can be caused by a lot of reasons. If you take FT3 thyroid and BUN Creatinine ratio blood tests and the results are higher than 4.2 pg/mL for FT3 thyroid and lower than 5 Ratio for BUN Creatinine ratio, 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 BUN Creatinine ratio Tests Are Done :

If your doctor wants FT3 thyroid and BUN Creatinine ratio tests on you, you may need to go through these tests. During the FT3 thyroid and BUN Creatinine ratio 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 BUN Creatinine ratio 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