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Triiodothyronine, Free by Equilibrium Dialysis/HPLC-Tandem Mass Spectrometry (INACTIVE as of 11/03/14: Refer to 2011793)
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
ARUP Consult®
Disease Topics
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 years3.8-8.5 pg/mL3.7-7.7 pg/mL
7-12 years3.6-6.5 pg/mL3.7-6.4 pg/mL
13-17 years2.9-5.6 pg/mL3.4-6.1 pg/mL
18 years and older3.2-6.6 pg/mL3.2-6.6 pg/mL
Pregnancy,1st Trimester3.0-5.7 pg/mL
Pregnancy, 2nd Trimester2.3-5.6 pg/mL
Pregnancy, 3rd Trimester3.0-5.7 pg/mL

Interpretive Data


Compliance Statement B: 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.

Note
CPT Code(s)
84481
Components
Component Test Code*Component Chart NameLOINC
0093243Free T3 by Equil Dialysis-TMS29239-1
* 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