Generally not recommended for routine evaluation of thyroid disorders, although may be considered in pregnant women.
Quantitative Liquid Chromatography-Tandem Mass Spectrometry
New York DOH Approval Status
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|
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|2007919||Triiodothyronine, Reverse - LC-MS/MS||3052-8|
- Reverse T3
- Reverse T3, Serum
- Reverse Triiodothyronine