Test Details

Mnemonic

TSI

Ordering Code

3426720

CPT-4 Code(s)

84445

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

Gross hemolysis, lipemia, icterus, plasma

Stability

Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 1 year

Methodology

Chemiluminescence
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Reference Range

<0.10 IU/L
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Performing Laboratory

Warde Medical Laboratory
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