Formal Name of the Test:
Other Names Used:
Resin Uptake,Triiodothyronine, Resin Uptake (T3),T3 Index,T3RU,T3 Resin Uptake,T3 (Triiodothyronine),Hanolsky Uptake Test
Pregnancy, estrogens, hyperproteinemia, and acute intermittent porphyria all cause a decrease in T3 uptake.
Androgens, hyperproteinemia, stress, and acute liver disease all cause an increase in T3 uptake.
This test measures the number of thyroid hormone binding sites that are available, and it should be read in conjunction with thyroxine levels.
There is no need for any prior preparation.
Test Performed at:
Quest Diagnostics, Test Code 861
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