Test Details

Mnemonic

T4

Ordering Code

1000840

CPT-4 Code(s)

84436

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 6.0 - 13.2 µg/dL
24 months (2 years) - 12 years 5.5 - 12.1 µg/dL
13 years - 20 years 5.5 - 11.1 µg/dL
21 years and above 4.5 - 10.9 µg/dL
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Performing Laboratory

Warde Medical Laboratory
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