Thyroid Hormone Test - Triiodothyronine - T3

This test measures the blood levels of triiodothyronine, a thyroid hormone.




This test measures the blood levels of triiodothyronine, a thyroid hormone.



This test checks the blood level of T3 (triiodothyronine), a hormone made by the thyroid gland. It is often done along with or after a thyroid-stimulating hormone (TSH) test and thyroxine (T4) test.

  • Thyroid hormones help control how the body uses energy, but are also associated with managing body temperature, muscle function, heart rates, and mental functioning.
  • This test may be done with other thyroid tests to see how well your thyroid gland is working.

In an adult, the blood sample is taken from a vein in the arm. If this test is done on an infant, blood is collected by pricking the heel or finger.

  • Some medications can interfere with the test. Ask your healthcare provider if you need to stop taking any medications before the test.
  • Do not stop taking any medication unless your healthcare provider tells you to do so.

What should I ask my healthcare provider before having this test?

  • Is there any special preparation for the test? (If so, get clear instructions on what you need to do.)
  • What is the reason for the test? Will the test results change my treatment plan? If not, do I need the test?

Source UHC.com

Also known as:

TSH
Triiodothyronine
TRH
Thyroid Hormone Test - Triiodothyronine - T3
Thyroid Gland
Thyroid Function
Thyroid Blood Test
T3 Blood Test
Laboratory Work
Hypothyroidism
Hypothyroid Test
Hyperthyroidism
Hyperthyroid Test
Goiter
Blood Test for Thyroid Disorder


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