Ordering Recommendation
Mnemonic
T3 FREE SP
Methodology
Quantitative Equilibrium Dialysis/High Performance Liquid Chromatography-Tandem Mass Spectrometry (HPLC-MS/MS)
Performed
Varies
Reported
8-14 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Plain red or lavender (K2EDTA). Also acceptable: Serum separator tube, lavender (K3EDTA), pink (K2EDTA), or Green (Sodium Heparin).
Specimen Preparation
Separate from cells ASAP or within 45 minutes of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.3 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.
Storage/Transport Temperature
Frozen. Also acceptable: Refrigerated or Room Temperature.
Unacceptable Conditions
Specimen submitted in gel-barrier tube.
Remarks
Stability
Ambient: 5 days; Refrigerated: 5 days; Frozen: 10 weeks
Reference Interval
By report
Interpretive Data
Compliance Category
Performed by non-ARUP Laboratory
Note
Hotline History
Hotline History
Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
N/A
CPT Codes
84481
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
2011794 | Free Triiodothyronine, Dialysis/LC-MS/MS |
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
- Triiodothyronine, Free (FT3)
Triiodothyronine (T3), Free by Equilibrium Dialysis/LC-MS/MS
Esoterix Endocrinology