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Thyroxine, Total

Thyroxine, Total is a topic covered in the Davis's Lab & Diagnostic Tests.

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Common Use:
A complementary laboratory test in evaluating thyroid hormone levels, a screening test for newborns to detect thyroid dysfunction, and a tool to evaluate the effectiveness of therapeutic thyroid therapy.

Serum collected in a gold-, red-, or red/gray-top tube. Plasma collected in a green-top (heparin) tube is also acceptable.

Normal Findings:
(Method: Immunoassay)

AgeConventional UnitsSI Units (Conventional Units × 12.9)
Cord blood6.6–17.5 mcg/dL85–226 nmol/L
1–30 d5.4–22.6 mcg/dL70–292 nmol/L
1 mo–23 mo5.4–16.6 mcg/dL70–214 nmol/L
2–6 yr5.3–15 mcg/dL68–194 nmol/L
7–11 yr5.7–14.1 mcg/dL74–182 nmol/L
12–19 yr4.7–14.6 mcg/dL61–188 nmol/L
Adult4.6–12 mcg/dL59–155 nmol/L
 Pregnant female5.5–16 mcg/dL71–206 nmol/L
Over 60 yr5–10.7 mcg/dL64–138 nmol/L

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Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Thyroxine, Total." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425169/all/Thyroxine__Total.
Bladh ML, Van Leeuwen AM. Thyroxine, Total. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425169/all/Thyroxine__Total. Accessed April 19, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Thyroxine, Total. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425169/all/Thyroxine__Total
Bladh ML, Van Leeuwen AM. Thyroxine, Total [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 April 19]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425169/all/Thyroxine__Total.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Thyroxine, Total ID - 425169 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/425169/all/Thyroxine__Total PB - F.A. Davis Company ET - 7 DB - Nursing Central DP - Unbound Medicine ER -