Test Details

Mnemonic

TFTLC

Ordering Code

3723600

CPT-4 Code(s)

84402, 84403

Specimen Information

Collect

Red top

Specimen Preparation

Centrifuge, remove serum from cells and send 1.8 mL serum in a screw capped plastic vial.

Alternate Specimen

Plasma: Sodium or lithium heparin

Minimum Volume

0.9 mL

Transport Temperature

Refrigerated

Rejection Criteria

Serum separator tube (SST), gross hemolysis, gross lipemia

Stability

Room temperature: 7 days
Refrigerated: 21 days
Frozen: 2 years

Methodology

Chromatography/Mass Spectrometry, Equilibrium Dialysis, Calculation
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Reference Range

See report
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Performing Laboratory

Quest SJC
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