Triiodothyronine, Free by Equilibrium Dialysis/HPLC-Tandem Mass Spectrometry
0093243
Ordering Recommendation
 
Mnemonic
FT3 ED-TMS
Methodology
Quantitative Equilibrium Dialysis/High Performance Liquid Chromatography-Tandem Mass Spectrometry
Performed
Sun, Tue, Thu
Reported
2-5 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Plain red.  
Specimen Preparation
Transfer 2 mL serum to an ARUP Standard Transport Tube. (Min: 0.3 mL)  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
  
Remarks
  
Stability
After separation from cells: Ambient: 4 days; Refrigerated: 2 weeks; Frozen: 1 month  
Reference Interval
Effective May 16, 2011
 
Free Triiodothyronine pg/mL
Age Female Male
6 month-​6 years 3.8-​8.5 pg/mL 3.7-​7.7 pg/mL
7-​12 years 3.6-​6.5 pg/mL 3.7-​6.4 pg/mL
13-​17 years 2.9-​5.6 pg/mL 3.4-​6.1 pg/mL
18 years and older 3.2-​6.6 pg/mL 3.2-​6.6 pg/mL
Pregnancy,1st Trimester 3.0-​5.7 pg/mL  
Pregnancy, 2nd Trimester 2.3-​5.6 pg/mL  
Pregnancy, 3rd Trimester 3.0-​5.7 pg/mL  
Interpretive Data


See Compliance Statement B: www.aruplab.com/CS  
Note
 
CPT Code(s)
84481
Components
Component Test Code*Component Chart Name
0093243Free T3 by Equil Dialysis-TMS
* 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
  • Direct Dialysis
  • FT3
  • T3, Free, Equilibrium Dialysis
  • Triiodothyronine, Free (FT3), Dialysis and LC/MS-MS