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General Information

Mayo Clinic Laboratories

Test Code LAB137 T3, FREE

Specimen Information

Container Specimen Temperature Collect Vol Submit Vol Min Vol Stability
SST Serum Refrigerate 4 mL 0.5 mL 0.2 mL 7 days
Lithium Heparin (green top) Plasma Refrigerate 4 mL 0.5 mL 0.2 mL 7 days

*While a green microtainer is an optional tube type in rare circumstances, it is not recommended.

Test Schedule / Analytical Time / Test Priority

Daily / Same day / Available STAT

Reference Range

Age Sex Low High Units
0 - 2 weeks All 3.0 12.4 pg/mL
2 weeks - 2 years All 3.5 7.4 pg/mL
2 years - 4 years All 3.5 7.4 pg/mL
4 years - 13 years All 4.3 7.0 pg/mL
13 years - 18 years Female 3.7 6.1 pg/mL
13 years - 18 years Male 4.1 6.7 pg/mL
≥18 Years All 2.8 5.3 pg/mL

 

CPT(s)

Description CPT Code
T3, Free 84481

 

Method

Chemiluminescence Immunoassay

Instrumentation

Ortho Vitros 7600

Result Component(s)

Reporting Name Epic Code Atlas Code Mayo Access ID LOINC 
T3, Free   FREET3   3051-0

 

Performing Location

University of Vermont Medical Center

Section

Chemistry-1

Is the UVMMC lab NY State Certified to perform this testing?  Yes/No

Yes