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HelpOrder Code T3 Free T3 (Triiodothyronine) Free
Additional Codes
Epic Order ID LAB137
Sub activity Type
Chemistry
Collection tube (preferred)
Green Li PST
SST
Specimen Type
Plasma
Serum
Minimum Volume
0.6 ml
Stability
48 hours at 2-8°C
8 hours at room temp (20-23°C)
Clinical Significance
This test is used to diagnose hyperthyroidism and to clarify thyroid status in the presence of a possible protein binding abnormality.
Reference Range
Infants (1-23 months): 3.3-5.2 pg/mL
Children (2-12 years): 3.3-4.8 pg/mL
Adolescents (13-20 years): 3.0-4.7 pg/mL
Adults: 2.3-4.2 pg/mL