Generally not recommended for routine evaluation of thyroid disorders, although may be considered in pregnant women.
Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Plain red or serum separator tube. Also acceptable: Lavender (EDTA) or pink (K2EDTA).
Allow serum specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within two hours of collection. Transfer 2 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 1 mL)
Grossly hemolyzed specimens
Ambient: 24 hours; Refrigerated: 1 week; Frozen: 3 months
|0 -17 years||Not established|
|18 years and older||9.0 - 27.0 ng/dl|
Compliance Statement B: For laboratory developed tests not using a RUO kit, and for FDA approved, cleared or 510(k) exempt assays with alterations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
|Component Test Code*||Component Chart Name||LOINC|
|2007919||Triiodothyronine, Reverse - LC-MS/MS||3052-8|
- Reverse T3
- Reverse T3, Serum
- Reverse Triiodothyronine