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Laboratory Medicine

Test catalogue

Thyroxine Binding Globulin (TBG)

Test name

Thyroxine Binding Globulin (TBG)

Gold Tube Specimen Type/Requirements

Container Type = 1 Gold Top

Minimum Volume = 3 mL Blood

Specimen Handling

Collection Instructions: Collect in 3mL gold top tube (SST). Plasma is not suitable for analysis. Write your initials, date and time of collection on the collection label or requisition.

Laboratory Staff Instructions: Separate sample as soon as possible.

Rejection Criteria: Plasma, Unlabeled or Not Sufficient Quantity Samples will be rejected.

Stability: Specimen stable for 2 days refrigerated and 6 months frozen.

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Biochemistry requisition

Turnaround Time (TAT)

15 Days

Test Utilization

Reference Value

1 - 11 m: 315 - 685 nmol/L; 1 - 9 y: 278 - 500 nmol/L; 10 y and over: 260 - 575 nmol/L

Test Code




Testing Location

Referred Out – ON, Canada (ROICL02)

Other Information