Thyroid Hormone Test -Total Triiodothyronine - T3

This blood test measures the level of one of the hormones made by the thyroid gland, total triiodothyronine (T3).




This blood test measures the level of one of the hormones made by the thyroid gland, total triiodothyronine (T3).



Thyroid hormones help control how the body uses energy. They are also associated with managing body temperature, muscle function, heart rates and mental functioning. This blood test measures the level of total triiodothyronine, or T3.

  • T3 is one of the hormones made by the thyroid gland.
  • T3 testing may be recommended if previous testing indicates there may be a problem with the thyroid gland, such as when it appears to be either underactive or overactive.

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.

This care path's costs do not include the charge to draw blood from a vein (venipuncture). There will only be one charge to draw blood, even if multiple tests are being performed on the samples that are taken.

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:

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


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