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Triiodothyronine (T3), Free by Equilibrium Dialysis/LC-MS/MS
2011793
Ordering Recommendation
Mnemonic
T3 FREE SP
Methodology
Quantitative Equilibrium Dialysis/High Performance Liquid Chromatography-Tandem Mass Spectrometry
Performed
Varies
Reported
8-14 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
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) 
Storage/Transport Temperature
Frozen. Also acceptable: Refrigerated or Room Temperature. 
Unacceptable Conditions
 
Remarks
 
Stability
Ambient: 5 days; Refrigerated: 5 days; Frozen: 10 weeks 
Reference Interval
By report
Interpretive Data


Note
CPT Code(s)
84481
Components
Component Test Code*Component Chart NameLOINC
2011794Free 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)

Performed at Esoterix Endocrinology