Version 2.77

Part Description

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

Reference Information

Type Source Reference
Webcontent Lab Tests Online®Copyright Copyright © 2021 Lab Tests Online. All rights reserved. T3 (Free and Total)

Fully-Specified Name

Component
Triiodothyronine.free
Property
MCnc
Time
Pt
System
Ser/Plas
Scale
Qn
Method

Additional Names

Short Name
T3Free SerPl-mCnc
Display Name
Free T3 [Mass/Vol]
Consumer Name Alpha Get Info
Free T3, Blood

Basic Attributes

Class
CHEM
Type
Laboratory
First Released
Version 1.0
Last Updated
Version 2.73
Order vs. Observation
Both
Common Test Rank Get Info
320

Member of these Groups Get Info

LOINC Group Group Name
LG11488-0 Triiodothyronine.free|MCnc|Pt|ANYBldSerPl
LG46407-9 Triiodothyronine.free|Pt|Ser/Plas

Language Variants Get Info

Tag Language Translation
de-DE German (Germany) Trijodthyronin.frei:Massenkonzentration:Zeitpunkt:Serum oder Plasma:Quantitativ:
Synonyms: fT3
de-AT German (Austria) Synonyms: Freies T3
el-GR Greek (Greece) Τριιωδοθυρονίνη ελεύθερη:Συγκέντρωση μάζας:Χρονική στιγμή:Ορός/Πλάσμα:Ποσοτική:
Synonyms: Τ3
es-MX Spanish (Mexico) Triyodotironina libre:Concentración de masa:Punto temporal:Suero o Plasma:Cuantitativo:
es-ES Spanish (Spain) Triiodotironina libre:Concentración de masa:Punto temporal:Suero o Plasma:Qn:
Synonyms: Cuantitativo
es-AR Spanish (Argentina) triyodotironina.libre:concentración de masa:punto en el tiempo:suero/plasma:cuantitativo:
et-EE Estonian (Estonia) Trijoodtüroniin.vaba:MCnc:Pt:S/P:Qn:
Synonyms: Juhuslik Kvantitatiivne Plasma Seerum Seerum või plasma
fr-CA French (Canada) Triiodothyronine.libre:Concentration de masse:Temps ponctuel:Sérum/Plasma:Quantitatif:
fr-FR French (France) Triiodothyronine libre:Masse/Volume:Ponctuel:Sérum/Plasma:Numérique:
fr-BE French (Belgium) Triiodothyronine.libre:Concentration de masse:Temps ponctuel:Sérum/Plasma:Quantitatif:
Synonyms: T3 T3L,fT3
it-IT Italian (Italy) Triiodotironina.libera:MCnc:Pt:Siero/Plasma:Qn:
Synonyms: Chimica Concentrazione di Massa Plasma Punto nel tempo (episodio) Siero Siero o Plasma T3 Triiodotironina Libera
ko-KR Korean (Korea, Republic Of) 유리삼요드티로닌:질량농도:검사시점:혈청/혈장:정량:
nl-NL Dutch (Netherlands) tri-iodothyronine.vrij:massa/volume:moment:serum of plasma:kwantitatief:
pl-PL Polish (Poland) Wolna trójjodotyronina:stężenie masowe:punkt w czasie:surowica lub osocze:ilościowy:
pt-BR Portuguese (Brazil) Triiodotironina.livre:MCnc:Pt:Sor/Plas:Qn:
Synonyms: ; T3Free; Triodothyrne; T-3; FT3; T3; Mass concentration; Level; Point in time; Random; SerPl; SerPlas; SerP; Serum; SR; Plasma; Pl; Plsm; Quantitative; QNT; Quant; Quan; FR; Non-protein bound; Chemistry
ru-RU Russian (Russian Federation) Трийодтиронин.свободный:МассКонц:ТчкВрм:Сыв/Плаз:Колич:
Synonyms: Количественный Массовая концентрация Плазма Сыворотка Сыворотка или Плазма Точка во времени;Момент
tr-TR Turkish (Turkey) Triiyodotironin.serb:KütlKons:Zmlı:Ser/Plaz:Kant:
uk-UA Ukrainian (Ukraine) Трийодтиронін.вільний:Масова Концентрація:МоментЧасу:Сироватка/Плазма:Кількісно:
Synonyms: Chemistry; Endocrine; Endocrinology; FR; Free T3; FT3; Level; Mass concentration; Non-protein bound; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; T3; T-3; T3Free; thyroid hormone; Total T3; Triodothyrne; UniversalLabOrders
zh-CN Chinese (China) 三碘甲状腺原氨酸.游离型:质量浓度:时间点:血清/血浆:定量型:
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 FT3;T3;T-3;T3.游离;T3.游离型;三碘甲状腺原氨酸.游离;三碘甲状腺原氨酸.游离型;三碘甲状腺氨酸;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;三碘甲腺原氨酸.游离;三碘甲腺原氨酸.游离型;游离 T3;游离三碘甲状腺原氨酸;游离三碘甲状腺氨酸;游离三碘甲腺原氨酸;游离型 T3;游离型三碘甲状腺原氨酸;游离型三碘甲状腺氨酸;游离型三碘甲腺原氨酸;甲磺安 化学;化学检验项目;化学检验项目类;化学类;化学试验;非刺激耐受型化学检验项目;非刺激耐受型化学检验项目类;非刺激耐受型化学试验;非刺激耐受型化学试验类 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 时刻;随机;随意;瞬间 水平;浓度;质量浓度(单位体积) 游离 血清或血浆 非蛋白结合型 非蛋白质结合型

Example Units

Unit Source
ng/L eCHN
pg/dL REGENSTRIEF
pg/mL Example UCUM Units
pg/mL REGENSTRIEF

LOINC Terminology Service (API) using HL7® FHIR® Get Info

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=3051-0