What is the Triiodothyronine (T3) Resin Uptake Test? Why is the test done? Everything around this, that you should know, in this post and of course our doctors are always there to help you. Just fill in your details in the form down below and we will answer all your questions for FREE!
What is T3 resin uptake?
It is also called T3RU tests. It is a blood test performed for evaluation of the thyroid function. It is always confused with the concentration level of T3, which in fact it does not. It is usually done to measure the amount of TBG in the blood and the level of t4 and t3 freely flowing in the blood.
Also Read: Thyroid Function Test
What is the interpretation of the T3RU test?
It interprets the results of t3 and t4 blood tests usually measuring the amount of thyroid-related protein which carries thyroid hormone in the blood. This test is rarely used now.
Why the test is performed?
This test is done to check the thyroid function but depends upon the action of different hormones TSH, t3, and t4 levels.
It checks the amount of TBG that carries T3 and T4 in the blood.
Or if you have signs of abnormal thyroid function or certain health conditions can indicate the test:
- Hypothyroidism
- Hyperthyroidism
- Thyrotoxic periodic paralysis.
- Subacute thyroiditis
- Graves disease
- Toxic nodular goitre
What is the average value of T3RU?
The average value of T3RU is 24-37%.
What does a higher level of T3RU indicate?
A higher level may indicate:
- Hyperthyroidism
- Kidney failure
- Cirrhosis
- Nephrotic syndrome
- Congenital X-linked deficiency in TBG
- Cushing disease
- Acromegaly
What does a low level of T3RU indicate?
Low level means:
- Hypothyroidism
- It can be low during pregnancy
- Congenital X-linked TBG excess
- Hepatitis
- Porphyria
- History of prolonged medication like oestrogen, oral contraceptive etc.
Also Read: T3 Test
For more information, you can visit MedlinePlus and NCBI.
