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Part Description

LP183619-8   Thyroid hormone uptake
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

LOINC Names Get Info

Fully-Specified Name
Thyroid hormone uptake:NFr:Pt:Ser/Plas:Qn:
Long Common Name
Thyroid hormone uptake (T-uptake) in Serum or Plasma
Short Name
T-uptake NFr SerPl
Display Name
Thyroid hormone uptake (T-uptake)
Consumer Name Alpha Get Info
Thyroid Hormone Uptake (T-uptake), Blood

Part Model Get Info

  • Component
    Thyroid hormone uptake
    LP183619-8
    • Analyte
      Thyroid hormone uptake
      LP183619-8
      • Component Numerator
        Thyroid hormone uptake
        LP183619-8
        • Component Numerator Core
          Thyroid hormone uptake
          LP183619-8
        • Component Numerator Core Suffix
          NULL
           
      • Component Denominator
        NULL
         
        • Component Denominator Core
          NULL
           
        • Component Denominator Core Suffix
          NULL
           
    • Challenge
      NULL
       
    • Adjustment
      NULL
       
    • Count
      NULL
       
  • Property
    NFr
    LP6838-9
  • Time
    Pt
    LP6960-1
  • System
    Ser/Plas
    LP7576-4
    • System Core
      Ser/Plas
      LP7576-4
    • Super System
      NULL
       
  • Scale
    Qn
    LP7753-9
  • Method
    NULL
     

Basic Attributes

Class
CHEM
Type
Laboratory
First Released
Version 2.48
Last Updated
Version 2.73 (MIN)
Order vs. Observation
Both
Common Test Rank Get Info
5209

Language Variants Get Info

TagLanguageTranslation
cs-CZCzech (Czechia)Hormony štítné žlázy absorpce (T-absorpce):Početní podíl:Časový bod:Sérum/plazma:Kvantitativní:
el-GRGreek (Greece)Πρόσληψη θυρεοειδικής ορμόνης:NFr:Pt:Ορός/Πλάσμα:Qn:
Synonyms: CHEM NFr Pt Qn Ορός Ορός/Πλάσμα Πλάσμα Πρόσληψη Πρόσληψη θυρεοειδικής ορμόνης
es-ESSpanish (Spain)Captación de hormona tiroidea:Fracción numérica:Punto temporal:Suero o Plasma:Qn:
Synonyms: Cuantitativo
es-MXSpanish (Mexico)Captación de hormona tiroidea:Fracción numérica:Punto temporal:Suero o Plasma:Cuantitativo:
fr-FRFrench (France)Hormones thyroïdiennes absorption:Fraction de nombres:Ponctuel:Sérum/Plasma:Numérique:
it-ITItalian (Italy)Tiroide, asoorbimento ormone:NFr:Pt:Siero/Plasma:Qn:
Synonyms: Assorbimento dell''ormone tiroideo Chimica Frazione numerica Plasma Punto nel tempo (episodio) Siero Siero o Plasma
nl-NLDutch (Netherlands)thyroïdhormoon opname:getalsfractie:moment:serum of plasma:kwantitatief:
Synonyms: thyroid hormoon opname
ru-RURussian (Russian Federation)Тиреоидный гормон захват:КолДоля:ТчкВрм:Сыв/Плаз:Колич:
Synonyms: Количественный Количество отношение Плазма Сыворотка Сыворотка или Плазма Точка во времени;Момент
tr-TRTurkish (Turkey)Tiroid hormon uptake:SayFr:Zmlı:Ser/Plaz:Kant:
Synonyms: Tiroid hormon kullanımı
zh-CNChinese (China)甲状腺激素摄取:计数型分数:时间点:血清/血浆:定量型:
Synonyms: 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 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 甲状腺特异性 甲状腺的 甲状腺荷尔蒙摄取 荷尔蒙 血清或血浆

Example Units

UnitSource
%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=74793-1