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Lab Dept:
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Chemistry
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Test Name:
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THYROXINE BINDING GLOBULIN
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General Information
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Lab Order Codes:
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TBG
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Synonyms:
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TBG
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CPT Codes:
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84442 – Thyroxine binding globulin
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Test Includes:
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TBG reported in mg/dL.
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Logistics
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Test Indications:
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N/A
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Lab Testing Sections:
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Chemistry - Sendouts
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Referred to:
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Esoterix Inc. (Test# 500318)
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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2 - 5 days, test set up Monday-Friday
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Special Instructions:
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N/A
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Specimen
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Specimen Type:
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Blood
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Container:
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Red top tube
Alternate tube: Lavendar (EDTA) top tube
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Draw Volume:
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3 mL (Minimum: 0.9 mL) blood
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Processed Volume:
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1 mL (Minimum: 0.3 mL) serum
Note: Minimum value does not allow for repeat analysis.
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Collection:
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Routine venipuncture
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Special Processing:
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Lab Staff: Centrifuge specimen, remove serum aliquot into a screw-capped round bottom vial. Separate within one hour of collection. Store and ship frozen. Forward promptly.
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Patient Preparation:
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None
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Sample Rejection:
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Mislabeled or unlabeled specimens
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Interpretive
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Reference Range:
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Age
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Range (ug/mL)
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Children:
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12.7 – 27.9
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Adults:
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13 – 39
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Critical Values:
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N/A
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Limitations:
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N/A
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Methodology:
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Competitive Immunoassay (ICMA – Chemiluminescent) Assay
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References:
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Esoterix Inc. “Expected Value and S.I. Unit Conversion Table”, 5th Edition
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Esoterix Laboratories Web Page www.esoterix.com July 2012
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Updates:
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9/27/2010: Minimum volume, method (previously listed as Double antibody RIA) and reference range update
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