- Test Name
- Thyroxine Binding Globulin
- Aliases
- TBG,T4 Binding Globulin
- Provincial Mnemonic
- T4BG
- LOINC Test Code
- 27980-2
- Description and Primary Use
- Useful test when thyroid function tests do not correlate with the metabolic state of the thyroid gland, most common in pregnancy or use of contraceptive steroids.
- Reorder interval
- N/A
- TAT
- 13 Days
- Test Cost
- $25.80
- Tier
- 3 - Special Authorization Required (See Required Consultation)
- Ordering Requirements (Restrictions / Conditions)
Approval requires test order by endocrinologist.
- Required Consultations
- Consultation with an Endocrinologist or Contact the Biochemist-on-Call at (709-697-2306)
- Algorithms and Guidelines
N/A
- Special Patient Preparation
None
- Special Collection / Transport / Processing Requirements
Centrifuge and aliquot serum to a transport tube and freeze aliquot within 24 hours.
- Criteria for Rejection
Gross hemolysis
- Laboratory Service Area
- Clinical Chemistry
- Performing Laboratory / Site
- Referred out of province
- Last Updated
- 29-May-19