Test Details

Mnemonic

TBG

Ordering Code

1000837

CPT-4 Code(s)

84442

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

Hemolyzed, grossly lipemic specimens, plasma

Stability

Room temperature: Unacceptable
Refrigerated: 2 days
Frozen: 30 days

Methodology

Chemiluminescence
more

Reference Range

14.0 - 31.0 µg/mL
more

Performing Laboratory

Warde Medical Laboratory
more