Sign in →

T3 (free)

Important Note

*This test is orderable in Cerner as Free Triiodothyronine (Free T3)

Instrumentation

Roche Cobas

 

Performing Laboratory

Rutland Regional Medical Center Laboratory

Specimen Requirements

Submit only 1 of the following specimens:

Specimen Type: Blood
Container/Tube:  Light-green top (lithium heparin gel or green-yellow)

Specimen Fill Volume: Full tube

Specimen Minimum Volume: 2 mL

Collection Instructions:

1. Send specimen in original tube.

2. If there is a delay in transport of >1 hour, centrifuge tube.

Specimen Transport Temperature

Refrigerated

Day(s) Performed

Daily

Analytical Time:

1 day

Test Classification and CPT Coding

84481

Reference Values

20 - 150 years: 2.0-4.0 pg/ml
Children:
0-29 days: 2.0 - 5.2 pg/mL
30 days - < 1 year: 1.5 - 6.4 pg/ml
2 years-< 7 years: 2.0 - 6.0 pg/ml
7 years - < 12 years: 2.7 - 6.0 pg/ml
12 - < 20 years: 2.3 - 5.0 pg/mL