T3: Results and Values (Triiodothyronine, T3 Radioimmunoassay)

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Alternate Names : Triiodothyronine, T3 Radioimmunoassay

The amount of T3 in blood normally ranges from 100 to 200 nanograms per deciliter (ng/dL).

Abnormally high levels of T3 may indicate the following:

hyperthyroidism, or an overactive thyroid

T3 thyrotoxicosis, a condition in which the body tissues are exposed to excessive amounts of T3

thyroiditis, which is an inflammation of the thyroid

Abnormally low levels of T3 may indicate the following:

chronic illness

Hashimoto''s disease, an autoimmune disorder in which the body attacks its own thyroid gland for no known reason

hypothyroidism, or an underactive thyroid

starvation

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T3: Preparation & Expectations

Author: David T. Moran, MD
Reviewer: Eileen McLaughlin, RN, BSN
Date Reviewed: 07/05/01

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