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Test Directory

Total T4



Expected Turnaround

24 hours

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.


Electrochemiluminescence-immunoassay (ECLIA)

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

1 ML

0 - 999



4.5 μg/dL - 11.7 μg/dL

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