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Term Description

Triiodothyronine to thyroxine (T3/T4) ratio is used to assess thyroid function and for the diagnosis of borderline thyrotoxicosis, euthyroid sick syndrome, iodine deficiency, thyrotoxicosis factitia, autonomous nodules of the thyroid gland, and in post-treated hyperthyroid patients to distinguish a typical hyperthyroidism from destructive thyroiditis. Mortoglou et. al. (2004) reported that a ratio of total T3/T4 >18.9 suggests Graves' disease or toxic multinodular goiter and T3/T4 <16 suggests subacute or silent thyroiditis.
Source: Regenstrief LOINC

Reference Information

TypeSourceReference
Package InsertOrtho Clinical DiagnosticsExample package insert. This LOINC code is not constrained to this specific product. T3 Uptake Reagent Pack

LOINC Names Get Info

Fully-Specified Name
Triiodothyronine/Thyroxine:MRto:Pt:Ser/Plas:Qn:
Long Common Name
Triiodothyronine (T3)/Thyroxine (T4) [Mass Ratio] in Serum or Plasma
Short Name
T3/T4 SerPl
Display Name
T3/T4 [Mass ratio]
Consumer Name Alpha Get Info
T3/T4, Blood

Part Model Get Info

  • Component
    Triiodothyronine/Thyroxine
    LP307573-8
    • Analyte
      Triiodothyronine/Thyroxine
      LP307573-8
      • Component Numerator
        Triiodothyronine
        LP15922-5
        • Component Numerator Core
          Triiodothyronine
          LP15922-5
        • Component Numerator Core Suffix
          NULL
           
      • Component Denominator
        Thyroxine
        LP145811-8
        • Component Denominator Core
          Thyroxine
          LP145811-8
        • Component Denominator Core Suffix
          NULL
           
    • Challenge
      NULL
       
    • Adjustment
      NULL
       
    • Count
      NULL
       
  • Property
    MRto
    LP6834-8
  • 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 2.44
Last Updated
Version 2.44 (MIN)
Order vs. Observation
Observation

Language Variants Get Info

TagLanguageTranslation
cs-CZCzech (Czechia)Trijodtyronin/tyroxin:Hmotnostní poměr:Časový bod:Sérum/plazma:Kvantitativní:
el-GRGreek (Greece)Τριιωδοθυρονίνη/Θυροξίνη:MRto:Pt:Ορός/Πλάσμα:Qn:
Synonyms: CHEM MRto Pt Qn Θυροξίνη Ορός Ορός/Πλάσμα Πλάσμα Τριιωδοθυρονίνη
es-ESSpanish (Spain)Triiodotironina; T3/Tiroxina:Relacion de Masa:Punto temporal:Suero o Plasma:Qn:
Synonyms: Cuantitativo
es-MXSpanish (Mexico)Triyodotironina / Tiroxina:Relación de masa:Punto temporal:Suero o Plasma:Cuantitativo:
fr-FRFrench (France)Triiodothyronine/thyroxine:Masse ratio:Ponctuel:Sérum/Plasma:Numérique:
it-ITItalian (Italy)Triiodotironina/Tiroxina:MRto:Pt:Siero/Plasma:Qn:
Synonyms: Chimica Plasma Punto nel tempo (episodio) Rapporto di Massa Siero Siero o Plasma T3
nl-NLDutch (Netherlands)tri-iodothyronine/thyroxine:massaverhouding:moment:serum of plasma:kwantitatief:
pl-PLPolish (Poland)Trijodotyronina/tyroksyna:współczynnik masowy:punkt w czasie:surowica lub osocze:ilościowy:
ru-RURussian (Russian Federation)Трийодтиронин/Тироксин:МассОтн:ТчкВрм:Сыв/Плаз:Колич:
Synonyms: Количественный Масс отношение Плазма Сыворотка Сыворотка или Плазма Точка во времени;Момент
tr-TRTurkish (Turkey)Triiyodotironin/Tiroksin:KütlOr:Zmlı:Ser/Plaz:Kant:
zh-CNChinese (China)三碘甲状腺原氨酸/甲状腺素:质量比率:时间点:血清/血浆:定量型:
Synonyms: 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 T4 T4;T-4;四碘甲状腺原氨酸;四碘甲腺原氨酸;左旋四碘甲状腺原氨酸;左旋四碘甲腺原氨酸;左旋甲状腺氨酸;左旋甲状腺素;左旋甲状腺素（Levothyroxine，Levo-thyroxine，L-thyroxine）;甲状腺氨酸 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 来自于同一体系的两种分析物的质量之比;质量比 血清或血浆

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

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=70152-4