Thyroxine Binding Globulin (TBG), Serum (Referred Out) - Saskatoon
Discipline
Biochemistry
Overview
Alias
- TBG
Specimen Information
Specimen types accepted
- Serum
Specimen collection container
- Preferred collection container: Gold (gel)
- Alternative collection container: Red (non-gel)
Collection procedure
- Serum must be frozen within 24 hours of collection
Required volume
- Optimal volume: full 4.5 mL collection tube
- Minimum volume: 1 mL serum
(Submitting the minimum volume makes it impossible to repeat the test or perform confirmatory/reflex testing. In some situations, a minimum volume may require a second collection.)
Rejection criteria
- Specimens received where the proper collection protocols were not followed
- Pathology and Laboratory Medicine Acceptance and Rejection Criteria
Testing Information
Clinical interpretation
- Useful when thyroid function tests do not correlate with the metabolic state of the thyroid gland, most common in pregnancy or use of contraceptive steroids
Performance
Days/times performed
Availability |
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Testing site |
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Maximum laboratory time
Results reporting
- 13 day turnaround time by testing laboratory
Last Updated: October 24, 2024