Version 2.80

Part Description

LP15921-7   Triiodothyronine resin uptake (T3RU)
Thyroid hormone uptake ("T-uptake") assays provide information on the number of thyroid hormone binding sites, consisting primarily of thyroid binding globulin, thyroxine binding prealbumin and albumin. Since both T4 and T3 bind to these proteins, different assay formats have used either labeled T3 or T4 (the classic T3 resin uptake uses T3). Various T-uptake assays can differ in the units reported (and even the phenomena being measured), requiring mindfulness when selecting LOINC codes. Being used in the calculation of free T3 and free T4 index (FTI), the T-uptake variants also proliferate into variants of FTI. The classic T-uptake reported as % represents the proportion of labeled thyroid hormone (either T3 or T4) added to a sample that remains unbound (modern assays: use LOINC 74793-1; T3 resin uptake method: 3050-2). T-uptake reported as ratio of patient /control is known as thyroid hormone binding ratio, or THBR or T-uptake ratio (use LOINC 74794-9). T-uptake % and THBR generally are inversely proportional to the number of unoccupied thyroid hormone binding sites present. Alternative assay methods that report T-uptake as "T-uptake units" are described as being directly proportional to the total binding capacity (use LOINC 74795-6).

However, the major rationale for measuring the T-Uptake was to obtain a factor for estimating the free T4 (the biologically relevant fraction). Now that Free T4 measures are widely available, accurate and more economical than measuring a T-uptake AND a TT4 , use of the uptake has been discouraged by most experts. Canada has taken the position of not paying for T-uptake measures. Source: Regenstrief LOINC

Fully-Specified Name

Component
Triiodothyronine resin uptake (T3RU)^1H post XXX challenge
Property
NFr
Time
Pt
System
Ser/Plas
Scale
Qn
Method

Additional Names

Long Common Name
Triiodothyronine resin uptake (T3RU) in Serum or Plasma --1 hour post XXX challenge
Short Name
T3RU 1h p chal NFr SerPl
Display Name
T3RU 1 Hr post Unsp challenge
Consumer Name Alpha Get Info
T3RU 1 hr after challenge, Blood

Basic Attributes

Class
CHAL
Type
Laboratory
First Released
Version 1.0l
Last Updated
Version 2.70 (MIN)
Order vs. Observation
Observation

Language Variants Get Info

Tag Language Translation
el-GR Greek (Greece) Πρόσληψη της τριιωδοθυρονίνης από ρητίνη (T3RU)^1 ώρα κατόπιν πρόκλησης XXX:NFr:Pt:Ορός/Πλάσμα:Qn:
Synonyms: NFr
es-AR Spanish (Argentina) captación de resina de triyodotironina^1 hora después de la provocación con XXX:fracción de un número:punto en el tiempo:suero/plasma:cuantitativo:
es-ES Spanish (Spain) Captación de triiodotironina por resina^1 hora pos provocación XXX:Fracción numérica:Punto temporal:Suero o Plasma:Qn:
Synonyms: Cuantitativo
es-MX Spanish (Mexico) Captación de resina de triyodotironina (T3RU)^1H post XXX desafío:Fracción numérica:Punto temporal:Suero o Plasma:Cuantitativo:
fr-CA French (Canada) T3 captation^1 h post test de provocation XXX:Fraction numérique:Temps ponctuel:Sérum/Plasma:Quantitatif:
fr-FR French (France) Triiodothyronine captation T01h après épreuve:Fraction de nombres:Ponctuel:Sérum/Plasma:Numérique:
fr-BE French (Belgium) T3 captation^1 h post test de provocation XXX:Fraction numérique:Temps ponctuel:Sérum/Plasma:Quantitatif:
Synonyms: T3 T3U
it-IT Italian (Italy) Triiodotironina resina, assorbimento^1h post XXX provocazione:NFr:Pt:Siero/Plasma:Qn:
Synonyms: 1 ora dopo XXX stimolo Assorbimento della triiodotironina resina dopo XXX provocazione Frazione numerica Plasma Punto nel tempo (episodio) Siero Siero o Plasma Stimolo T3 Test di provocazione
nl-NL Dutch (Netherlands) tri-iodothyronine harsopname (T3RU)^60 min na XXX belasting:getalsfractie:moment:serum of plasma:kwantitatief:
Synonyms: 1 uur na XXX belasting
pt-BR Portuguese (Brazil) Triiodotironina.retenção^60 min após administração de XXX:NFr:Pt:Sor/Plas:Qn:
Synonyms: ; T3RU; T3uptake; T3 binding ratio; RT3U; Triiodothyroinine uptake; T3U; T3 RU; T uptake; Triodothyrne; T-3; FT3; 1H p chal; Fr; Number fraction; Percent; Point in time; Random; SerPl; SerPlas; SerP; Serum; SR; Plasma; Pl; Plsm; Quantitative; QNT; Quant; Quan; PST; After; CHEMISTRY.CHALLENGE TESTING; CHEMISTRY.CHALLENGE TESTING
ru-RU Russian (Russian Federation) Трийодтиронин смолы захват (T3RU)^1 час после XXX пробы:КолДоля:ТчкВрм:Сыв/Плаз:Колич:
Synonyms: Количественный Количество отношение Плазма Провокационная проба Сыворотка Сыворотка или Плазма Точка во времени;Момент
tr-TR Turkish (Turkey) Triiyodotironin reçine apteyk (T3RU)^1Sa snr XXX girişimi:SayFr:Zmlı:Ser/Plaz:Kant:
zh-CN Chinese (China) 三碘甲状腺原氨酸树脂摄取^在XXX刺激之后1小时:计数型分数:时间点:血清/血浆:定量型:
Synonyms: 1Hr之后于XXX刺激;1Hr之后于此处不作说明的刺激;1小时之后于XXX刺激;1小时之后于此处不作说明的刺激;60Min之后于XXX刺激;60Min之后于此处不作说明的刺激;60分钟之后于XXX刺激;60分钟之后于此处不作说明的刺激;在XXX刺激之后1Hr;在XXX刺激之后60Min;在XXX刺激之后60分钟;在此处不作说明的刺激之后1Hr;在此处不作说明的刺激之后1小时;在此处不作说明的刺激之后60Min;在此处不作说明的刺激之后60分钟 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 RT3U;T 摄入;T 摄取;T3 RU;T3 摄取;T3 树脂摄入;T3 树脂摄取;T3 结合比;T3 结合比例;T3 结合比率;T3RU;T3U;三碘甲状腺原氨酸树脂摄入;三碘甲状腺原氨酸树脂摄取（Triiodothyronine resin uptake，RT3U） XXX刺激 - 在...之后 XXX刺激因素 之后于 XXX 刺激;之后于 XXX 刺激因素;之后于此处不作说明的刺激;之后于此处不作说明的刺激因素;在 XXX 刺激因素之后;在此处不作说明的刺激之后;在此处不作说明的刺激因素之后 之后于... 刺激因素;挑战 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 在...以后 在后 摄取率;摄入;摄入率 数量型分数;数量或计数型分数;数量型分数或计数型分数 时刻;随机;随意;瞬间 此处不作说明的刺激 此处不作说明的刺激因素 血清或血浆

Example Units

Unit Source
% Example UCUM Units

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

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=17743-6