Search For Additional Tests
THYROXINE BINDING GLOBULIN
Number 552
CPT Code 84442
Alias TBG
Specimen Container SST
Specimen Type Serum
Turn Around Time
Days Performed
Reference Range Contact Laboratory
Alternate Specimen Red Top
Volume 1 mL Serum
Stability Ambient 7 Days
Stability Refrigerated 14 Days
Stability Frozen 14 Days
Patient Preparation
Methodology
Immunochemiluminometric assay (ICMA)
Limitations
TBG is normal in familial dysalbuminemic hyperthyroxinemia, an entity which can be incorrectly identified as thyrotoxicosis. Triiodothyronine uptake was described as having produced information equivalent to TBG in a study of 372 subjects.
Rejection Criteria
Additional Instructions
Performing Laboratory Reference Laboratory
TagsTHYROID, T3, T4