T3, FREE
Test Code: LAB137
CPT Code: 84481
Synonyms
T3 Free;FT3; Free Triiodothyronine, Free T3
Specimen Type
Serum
Specimen Container
SST (1 mL)
Volume
1.0 mL
Minimum Collection Volume
0.5 mL
Specimen Handling
Centrifuge to remove serum from cells. Store and transport refrigerated.
Patient Prep
The use of Biotin supplements has demonstrated significant interference with this test. It is suggested a patient refrain from taking biotin supplements for 24 to 48 hours before testing.
Temperature
Refrigerate
Methodology
Chemiluminescent
Stability
Room Temperature: 8 hours; Refrigerated: 4 days; Frozen : 1 month
Reference Range Information
0.0 - 2.3 pg/mL
Units
pg/mL
Schedule
As Requested
Turn Around Time
1 day
Place of Service
Swedish/Edmonds Laboratory
Department
Chemistry
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