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HelpTest Code LAB137 Triodothyronine, Free (FT3)
Specimen Requirement
0.6 ml lithium heparin plasma preferred, red or sst is acceptable.
Specimen Stability
6 days at 2-8° C
6 days at -20° C
Testing Schedule
Daily
Reference Range
1.71 - 3.71 pg/mL
Testing Department
Chemistry
Method
2 Step immunoassay Chemiluminescent Microparticle Immunoassay (CMIA)
CPT Code
84481
Outpatient Turnaround Time
24 hours after receipt
Inpatient STAT Turnaround Time
Not Applicable
Inpatient Routine Turnaround Time
4 hours after receipt