LP29126-7
Triiodothyronine.free
Active
Descriptions
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
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
- Part Display Name
- Triiodothyronine Free
- Part Type
- Component (Describes the core component or analyte measured)
- Created On
- 2002-06-18
- Construct for LOINC Short Name
- T3Free
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Language Variants Get Info
| Tag | Language | Translation |
|---|---|---|
| zh-CN | Chinese (China) | 三碘甲状腺原氨酸.游离型 Synonyms: FT3; |
| fr-CA | French (Canada) | Triiodothyronine.libre |
| et-EE | Estonian (Estonia) | Trijoodtüroniin.vaba |
| es-ES | Spanish (Spain) | Triiodotironina libre |
| it-IT | Italian (Italy) | Triiodotironina.libera Synonyms: Triiodotironina Libera |
| el-GR | Greek (Greece) | Τριιωδοθυρονίνη ελεύθερη |
| tr-TR | Turkish (Turkey) | Triiyodotironin.serb |
| ru-RU | Russian (Russian Federation) | Трийодтиронин.свободный |
| nl-NL | Dutch (Netherlands) | tri-iodothyronine.vrij |
| fr-BE | French (Belgium) | Triiodothyronine.libre Synonyms: T3L,fT3 |
| pl-PL | Polish (Poland) | Wolna trójjodotyronina |
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