Thyroxine-binding Globulin (TBG)

CPT: 84442

Expected Turnaround Time

1 - 3 days

Specimen Requirements


Specimen

Serum or EDTA plasma

Volume

1 mL

Minimum Volume

0.3 mL (Note: This volume does not allow for repeat testing.)

Container

Serum: Red-top tube or gel-barrier tube Plasma: Lavender-top (EDTA) tube

Collection

Separate serum or plasma within one hour; transfer into a plastic transport tube.

Storage Instructions

Ship frozen on dry ice.

Test Details


Methodology

Immunochemiluminometric assay (ICMA)

Reference Interval

Age Range (ug/mL) Children 12.7 - 27.9 Adults 13.0 - 39.0