The determination of T4 can be utilized for the following indications: the detection of hyperthyroidism, the detection of primary and secondary hypothyroidism, and the monitoring of TSH‑suppression therapy.
Autoantibodies to thyroid hormones can interfere with the assay.
Room temperature: 4 days Refrigerated: 8 days Frozen: 24 months
Total T4; T4, Serum; T4 (Thyroxine), Total; Thyroxine (T4); Thyroxine, Total
Serum, gel separator, SST
0 - 999
4.5 μg/dL - 11.7 μg/dL