Version 2.74


Free T4 is the metabolically active fraction of thyroxine and is the precursor of triiodothyronine (T3). Free T4 is a sensitive test for thyroid function and is increased with hyperthyroidism and decreased with hypothyroidism. Free T4 is not affected by changes in thryoxine-binding proteins. Information from Laboratory Test Handbook, Jacobs DS, DeMott WR, and Oxley DK, LexiComp, 2001. Source: Regenstrief Institute

Basic Part Properties

Part Type
Component (Describes the core component or analyte measured)
Created On
Construct for LOINC Short Name
T4 Free

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Language Variants Get Info

Tag Language Translation
zh-CN Chinese (China) 甲状腺素.游离型
Synonyms: FT4;FT-4;T4.游离;T4.游离型;游离 T4;游离型 T4;游离型甲状腺素;游离甲状腺素;甲状腺素.游离
fr-CA French (Canada) Thyroxine.libre
et-EE Estonian (Estonia) Türoksiin.vaba
es-ES Spanish (Spain) Tiroxina libre
it-IT Italian (Italy) Tiroxina.libera
Synonyms: Tiroxina libera
el-GR Greek (Greece) Θυροξίνη ελεύθερη
Synonyms: Ελεύθερη Τ4
tr-TR Turkish (Turkey) Tiroksin.serb
ru-RU Russian (Russian Federation) Тироксин.свободный
nl-NL Dutch (Netherlands) thyroxine.vrij
fr-BE French (Belgium) Thyroxine.libre
Synonyms: T4L,fT4
pl-PL Polish (Poland) wolna tyroksyna