What causes high FT3 thyroid and low APTT?

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

If your FT3 thyroid is in between 2.3 pg/mL and 4.2 pg/mL and your APTT is in between 22 seconds and 35 seconds then you need not worry as these are the normal ranges for FT3 thyroid and APTT 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 FT3 thyroid : 2.3 - 4.2 pg/mL

Ideal values of FT3 thyroid depending on age :

Age	Ideal FT3 thyroid value
<5 years	2.383
5-10 years	2.469
10-15 years	2.558
15-20 years	2.65
20-25 years	2.745
25-30 years	2.844
30-35 years	2.946
35-40 years	3.052
40-45 years	3.162
45-50 years	3.276
50-55 years	3.394
55-60 years	3.516
60-70 years	3.643
70-80 years	3.774
80-90 years	3.91
90-100 years	4.051
>100 years	4.197

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

If you want your blood test report to be interpreted by FT3 thyroid specialist, then you can upload your report. Our FT3 thyroid expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

1,37,160

Total number of patients treated

Some examples of conditions that increase or decrease FT3 thyroid levels include:

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

If you want your blood test report to be interpreted by FT3 thyroid specialist, you can upload your report. Our FT3 thyroid 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 APTT : 22 - 35 seconds

Ideal values of APTT depending on age :

Age	Ideal APTT value
<5 years	22.792
5-10 years	23.613
10-15 years	24.463
15-20 years	25.344
20-25 years	26.256
25-30 years	27.201
30-35 years	28.18
35-40 years	29.194
40-45 years	30.245
45-50 years	31.334
50-55 years	32.462
55-60 years	33.631
60-70 years	34.842
70-80 years	34.797
80-90 years	34.752
90-100 years	34.707
>100 years	34.662

High FT3 thyroid and low APTT can be caused by a lot of reasons. If you take FT3 thyroid and APTT blood tests and the results are higher than 4.2 pg/mL for FT3 thyroid and lower than 22 seconds for APTT, 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 APTT Tests Are Done :

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