ARUP's Laboratory Test Directory

Triiodothyronine, Free by Equilibrium Dialysis/HPLC-Tandem Mass Spectrometry : 0093243

Mnemonic: FT3 ED-TMS

Methodology: Equilibrium Dialysis/High Performance Liquid Chromatography-Tandem Mass Spectrometry
Performed: Mon-Fri
Reported: 2-5 days
Specimen Required: Collect:  One 5 mL plain red.

Storage/Transport Temperature:  2 mL serum at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.

Remarks:  Avoid use of serum separator tubes or gels.

Stability (collection to initiation of testing):  After separation from cells: Ambient: 4 days; Refrigerated: 2 weeks; Frozen: 1 month
Reference Interval:
 
Age Triiodothyronine pg/mL
1-9 years:
10-13 years:
14-17 years:
18 years and older: 		4.2-7.8 pg/mL
4.3-8.3 pg/mL
3.6-7.5 pg/mL
3.2-6.6 pg/mL
Pregnancy:
1st Trimester:
2nd Trimester:
3rd Trimester: 		Pregnancy:
3.0-5.7 pg/mL
2.3-5.6 pg/mL
3.0-5.7 pg/mL

CPT Code(s): 84481
Cross References: T3, Free, Equilibrium Dialysis
 
 

 

 

 
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