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: 14 days

Methodology

Chemiluminescence
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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
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Performing Laboratory

Warde Medical Laboratory
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