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To assist in evaluating thyroid function primarily related to diagnosing hyperthyroidism and monitoring the effectiveness of therapeutic interventions.
Serum collected in a gold-, red-, or red/gray-top tube. Plasma collected in a green-top (heparin) tube is also acceptable.
|Age||Conventional Units||SI Units (Conventional Units × 0.0154)|
|Cord blood||14–86 ng/dL||0.22–1.32 nmol/L|
|1–3 d||100–292 ng/dL||1.54–4.5 nmol/L|
|4–30 d||62–243 ng/dL||0.96–3.74 nmol/L|
|1–12 mo||105–245 ng/dL||1.62–3.77 nmol/L|
|1–5 yr||105–269 ng/dL||1.62–4.14 nmol/L|
|6–10 yr||94–241 ng/dL||1.45–3.71 nmol/L|
|16–20 yr||80–210 ng/dL||1.23–3.23 nmol/L|
|Adult||70–204 ng/dL||1.08–3.14 nmol/L|
|Older adult||40–181 ng/dL||0.62–2.79 nmol/L|
|Pregnant woman (last 4 mo gestation)||116–247 ng/dL||1.79–3.8 nmol/L|
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Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Triiodothyronine, 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/425030/all/Triiodothyronine__Total.
Bladh ML, Van Leeuwen AM. Triiodothyronine, Total. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425030/all/Triiodothyronine__Total. Accessed April 24, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Triiodothyronine, Total. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425030/all/Triiodothyronine__Total
Bladh ML, Van Leeuwen AM. Triiodothyronine, Total [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 April 24]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425030/all/Triiodothyronine__Total.
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