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Free T3, FT3.
A complementary adjunct to evaluate thyroid hormone levels primarily related to hyperthyroidism and to assess causes of hypothyroidism.
Serum collected in a gold-, red-, or red/gray-top tube.
|Age||Conventional Units||SI Units (Conventional Units × 1.54)|
|0–3 d||2–7.9 pg/mL||3.1–12.2 pmol/L|
|4–30 d||2–5.2 pg/mL||3.1–8 pmol/L|
|1–23 mo||1.6–6.4 pg/mL||2.5–9.9 pmol/L|
|2–6 yr||2–6 pg/mL||3.1–9.2 pmol/L|
|7–17 yr||2.9–5.1 pg/mL||4.5–7.8 pmol/L|
|Adults and older adults||2.6–4.8 pg/mL||4–7.4 pmol/L|
|Pregnant women (4–9 mo gestation)||2–3.4 pg/mL||3–5.2 pmol/L|
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Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Triiodothyronine, Free." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425347/all/Triiodothyronine__Free.
Bladh ML, Van Leeuwen AM. Triiodothyronine, Free. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425347/all/Triiodothyronine__Free. Accessed April 19, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Triiodothyronine, Free. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425347/all/Triiodothyronine__Free
Bladh ML, Van Leeuwen AM. Triiodothyronine, Free [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/425347/all/Triiodothyronine__Free.
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