Test Code T3FR T3, FREE (Triiodothyronine)

Performing Laboratory

St. Clair Hospital Laboratory

Specimen Requirements

Serum: Plain red top or SST.

Plasma: Li-heparin green top , K₂-EDTA and K₃-EDTA lavender top.

Sample Stability:

7 days at 2 – 8 ºC

30 days at -20 ºC (Freeze ONLY once)

Methodolgy

Electrochemiluminescence immunoassay

Expected Values

2.0-4.4 pg/mL