T3 Uptake – Decreased: Pregnancy, estrogens, hyperproteinemia, acute intermittent porphyria.
Increased: Androgens, hyperproteinemia, stress, acute liver disease.
This assay is a measure of available thyroid hormone binding sites and should be interpreted with thyroxine levels.
Synonyms: Resin Uptake, Triiodothyronine, Resin Uptake (T3), T3 Index, T3RU, T3 Resin Uptake, T3 (Triiodothyronine), Hanolsky Uptake Test, T-Uptake
SST, Serum. Volume 1 (0.5) mL serum. Stability: Refrigerated – 4 Days, Frozen – 2 Months