LOINC
Version 2.73

LP29126-7Triiodothyronine FreeActive

Descriptions

LP29126-7   Triiodothyronine.free
A thyroid hormone normally synthesized and secreted by the thyroid gland in much smaller quantities than thyroxine (T4). Most T3 is derived from peripheral monodeiodination of T4 at the 5' position of the outer ring of the iodothyronine nucleus. The hormone used by the tissues is mainly T3. Most of the T3 circulating in blood is bound to a protein. T3 not bound is called free T3. Source: National Library of Medicine, MeSH 2006

LP29126-7   Triiodothyronine.free
Free T3 (free triiodothyronine) is a measure of free circulating T3, excluding that which is bound to carrier proteins. This provides a more accurate measure of T3 levels because the carrier proteins can increase or decrease in various conditions artificially inflating or shrinking the total T3. T3 is discriminating for diagnosing and/or following the treatment of hyperthyroidism. It is not very useful at the low range of concentrations, so is not very helpful in diagnosing hypothyroidism. The thyroid delivers 20 times more T4 than T3, so T4 is the more relevant analyte except in special cases. Source: Regenstrief Help

Basic Part Properties

Name
Triiodothyronine.free
Type
Component
Created On
2002-06-18
Construct for LOINC Short Name
T3Free

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https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=LP29126-7

Language Variants Get Info

zh-CNChinese (China)
三碘甲状腺原氨酸.游离型
Synonyms: FT3;FT-3;T3;T-3;T3.游离;T3.游离型;T3Free;三碘甲状腺原氨酸.游离;三碘甲状腺氨酸.游离;三碘甲状腺氨酸.游离型;三碘甲腺原氨酸.游离;三碘甲腺原氨酸.游离型;游离 T3;游离型 T3;游离型三碘甲状腺原氨酸
nl-NLDutch (Netherlands)
tri-iodothyronine.vrij
et-EEEstonian (Estonia)
Trijoodtüroniin.vaba
fr-BEFrench (Belgium)
Triiodothyronine.libre
Synonyms: T3L,fT3
fr-CAFrench (Canada)
Triiodothyronine.libre
el-GRGreek (Greece)
Τριιωδοθυρονίνη ελεύθερη
it-ITItalian (Italy)
Triiodotironina.libera
Synonyms: Triiodotironina Libera
pl-PLPolish (Poland)
wolna trójjodotyronina
Synonyms: Triiodotironina Libera
ru-RURussian (Russian Federation)
Трийодтиронин.свободный
es-ESSpanish (Spain)
Triiodotironina libre
tr-TRTurkish (Turkey)
Triiyodotironin.serb