Triiodothyronine, Free

Triiodothyronine, Free is a topic covered in the Davis's Lab & Diagnostic Tests.

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General

Synonym/Acronym:
Free T3, FT3.

Common Use:
A complementary adjunct to evaluate thyroid hormone levels primarily related to hyperthyroidism and to assess causes of hypothyroidism.

Specimen:
Serum collected in a gold-, red-, or red/gray-top tube.

Normal Findings:
(Method: Immunoassay)

AgeConventional UnitsSI Units (Conventional Units × 1.54)
0–3 d2–7.9 pg/mL3.1–12.2 pmol/L
4–30 d2–5.2 pg/mL3.1–8 pmol/L
1–23 mo1.6–6.4 pg/mL2.5–9.9 pmol/L
2–6 yr2–6 pg/mL3.1–9.2 pmol/L
7–17 yr2.9–5.1 pg/mL4.5–7.8 pmol/L
Adults and older adults2.6–4.8 pg/mL4–7.4 pmol/L
Pregnant women (4–9 mo gestation)2–3.4 pg/mL3–5.2 pmol/L

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Citation

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TY - ELEC T1 - Triiodothyronine, Free ID - 425347 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/425347/all/Triiodothyronine__Free PB - F.A. Davis Company ET - 7 DB - Nursing Central DP - Unbound Medicine ER -