Test Details
Mnemonic
FT3
Ordering Code
1010900
CPT-4 Code(s)
84481
Specimen Information
Collect
Serum separator tube (SST)
Specimen Preparation
Centrifuge, separate serum from cells and send 1.0 mL serum in a screw capped plastic vial.
Alternate Specimen
Serum: Red top
Minimum Volume
0.5 mL
Transport Temperature
Refrigerated
Rejection Criteria
Grossly hemolyzed or grossly lipemic specimens, plasma
Stability
Room temperature; 8 hours
Refrigerated: 72 hours
Frozen: Undetermined
Refrigerated: 72 hours
Frozen: Undetermined
Methodology
Chemiluminescence
Reference Range
Age Reference range
1 - 23 months 3.3 - 5.2 pg/mL
24 months (2 Years) - 12 years 3.3 - 4.8 pg/mL
13 years - 20 years 3.0 - 4.7 pg/mL
21 years and above 2.3 - 4.2 pg/mL
1 - 23 months 3.3 - 5.2 pg/mL
24 months (2 Years) - 12 years 3.3 - 4.8 pg/mL
13 years - 20 years 3.0 - 4.7 pg/mL
21 years and above 2.3 - 4.2 pg/mL
Performing Laboratory
Warde Medical Laboratory
New York DOH Approval Status
Yes