Triiodothyronine (T3), Free, Dialysis and LC/MS-MS (Endocrine Sciences)

Use

Triiodothyronine (T3), Free, Dialysis and LC/MS-MS test is primarily used to provide a direct measurement of free tri-iodothyronine, a thyroid hormone, in the blood. This test is employed to assess thyroid function in various clinical scenarios, especially when normal protein binding may be altered, enhancing accuracy over automated methods. Conditions where this test is preferred include congenital thyroxine-binding protein deficiency, pregnancy, oral contraceptive or hormone therapy users, and those with critical illnesses. It helps in diagnosing hyperthyroidism, assessing thyroid function in patients with thyroid dysfunction, and monitoring patients on thyroid hormone replacement therapy.