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Thyroxine-Binding Globulin

Thyroxine-Binding Globulin is a topic covered in the Davis's Lab & Diagnostic Tests.

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Synonym/Acronym:
TBG.

Rationale
To evaluate thyroid hormone levels related to deficiency or excess to assist in diagnosing disorders such as hyperthyroidism and hypothyroidism.

Patient Preparation
There are no food, fluid, activity, or medication restrictions unless by medical direction.

Normal Findings
Method: Immunochemiluminometric assay (ICMA).

AgeConventional UnitsSI Units (Conventional Units × 10)
0–1 wk3–8 mg/dL30–80 mg/L
1–12 mo1.6–3.6 mg/dL16–36 mg/L
14–19 yr1.2–2.5 mg/dL12–25 mg/L
Greater than 20 yr1.3–3.3 mg/dL13–33 mg/L
Pregnancy, third trimester4.7–5.9 mg/dL47–59 mg/L
Oral contraceptives1.5–5.5 mg/dL15–55 mg/L

Critical Findings and Potential Interventions
N/A

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Citation

Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Thyroxine-Binding Globulin." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425213/1/Thyroxine_Binding_Globulin.
Bladh ML, Van Leeuwen AM. Thyroxine-Binding Globulin. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425213/1/Thyroxine_Binding_Globulin. Accessed June 16, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Thyroxine-Binding Globulin. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425213/1/Thyroxine_Binding_Globulin
Bladh ML, Van Leeuwen AM. Thyroxine-Binding Globulin [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 June 16]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425213/1/Thyroxine_Binding_Globulin.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Thyroxine-Binding Globulin ID - 425213 A1 - Bladh,Mickey Lynn, AU - Van Leeuwen,Anne M, BT - Davis's Laboratory & Diagnostic Tests UR - https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425213/1/Thyroxine_Binding_Globulin PB - F.A. Davis Company ET - 7 DB - Nursing Central DP - Unbound Medicine ER -