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Term Description

Note that both the numerator and denominator are concentration of the same protein in the CSF, ..BUT the denominator is the total CSF concentration and the numerator is the contribution of the protein in the CSF that is MADE IN THE CSF (i.e. "intrathecally") ---as opposed to protein that has diffused in from the blood. The calculation is IgX(Intracthecal fraction) = [IgX(Intrathecally synthsized concentration)/IgX(Total CSF Concentration)]*100 from "Multiple Sclerosis (1998) 4, 111 - 117"
From the same paper, the "IgX(Intrathecally synthsized concentration)" is complex to determine, but is based on the amount of protein in the CSF over and above that of the normal upper limit expected in the CSF (compared to that in blood). That 'over and above' amount is what is deemed to be produced in the CSF, which is the "Intrathecal Fraction"......
Same theme repeats in other papers (e.g. Am. J. Trop. Med. Hyg., 82(6), 2010, pp. 1094-1098)

LOINC Names Get Info

Fully-Specified Name
IgA.intrathecally synthesized/IgA.total:MFr:Pt:CSF:Qn:
Long Common Name
IgA.intrathecally synthesized/IgA.total in Cerebrospinal Fluid
Short Name
IgA.IT MFr CSF
Display Name
IgA.intrathecally synthesized/Total IgA (CSF) [Mass fraction]
Consumer Name Alpha Get Info
IgA.intrathecally synthesized/Total IgA, Spinal fluid

Part Model Get Info

  • Component
    IgA.intrathecally synthesized/IgA.total
    LP307477-2
    • Analyte
      IgA.intrathecally synthesized/IgA.total
      LP307477-2
      • Component Numerator
        IgA.intrathecally synthesized
        LP62858-3
        • Component Numerator Core
          IgA.intrathecally synthesized
          LP62858-3
        • Component Numerator Core Suffix
          NULL
           
      • Component Denominator
        IgA.total
        LP32073-6
        • Component Denominator Core
          IgA.total
          LP32073-6
        • Component Denominator Core Suffix
          NULL
           
    • Challenge
      NULL
       
    • Adjustment
      NULL
       
    • Count
      NULL
       
  • Property
    MFr
    LP6831-4
  • Time
    Pt
    LP6960-1
  • System
    CSF
    LP7156-5
    • System Core
      CSF
      LP7156-5
    • Super System
      NULL
       
  • Scale
    Qn
    LP7753-9
  • Method
    NULL
     

Basic Attributes

Class
CHEM
Type
Laboratory
First Released
Version 2.38
Last Updated
Version 2.83 (MIN)
Order vs. Observation
Observation

Formula (Readable)

IgA(Intracthecal fraction) = [IgA(Intrathecally synthsized concentration)/IgA(Total CSF Concentration)]*100

Language Variants Get Info

TagLanguageTranslation
cs-CZCzech (Czechia)IgA.intratekálně syntetizovaný/IgA.celkový:Hmotnostní podíl:Časový bod:Mozkomíšní mok:Kvantitativní:
de-ATGerman (Austria)Synonyms: IGA intrathek.Prod.%
el-GRGreek (Greece)IgA.ενδορραχιαίας σύνθεσης/IgA.ολική:MFr:Pt:ΕΝΥ:Qn:
Synonyms: CHEM IgA.ενδορραχιαίας σύνθεσης IgA.ολική MFr Pt Qn Ανοσοσφαιρίνη Α ΕΝΥ
es-ESSpanish (Spain)IgA intratecal/IgA total:Fracción de masa:Punto temporal:Líquido Cefalorraquideo:Qn:
Synonyms: Cuantitativo
es-MXSpanish (Mexico)IgA. sintetizado intrathecalmente / IgA.total:Fracción de masa:Punto temporal:Fluído espinal cerebral:Cuantitativo:
et-EEEstonian (Estonia)IgA.intratekaalne/IgA.üld:MFr:Pt:CSF:Qn:
Synonyms: Immuunglobuliin A Juhuslik Kvantitatiivne Liikvor
fr-CAFrench (Canada)IgA.synthétisé dans l'espace sous-dural/IgA.totales:Fraction de masse:Temps ponctuel:LCR:Quantitatif:
fr-FRFrench (France)Immunoglobuline A synthèse intratéchale/immunoglobuline A totale:Fraction massique:Ponctuel:Liquide céphalorachidien:Numérique:
fr-BEFrench (Belgium)IgA.synthétisé dans l'espace sous-dural/IgA.totales:Fraction de masse:Temps ponctuel:LCR:Quantitatif:
it-ITItalian (Italy)IgA.IT/IgA.totali:MFr:Pt:LCS:Qn:
Synonyms: Chimica Frazione di massa IgA.intratecale Liquido cerebrospinale Punto nel tempo (episodio)
nl-NLDutch (Netherlands)IgA.intrathecale synthese/IgA.totaal:massafractie:moment:liquor cerebrospinalis:kwantitatief:
pl-PLPolish (Poland)IgA.syntetyzowana wewnątrzoponowo/IgA.całkowite:frakcja masowa:punkt w czasie:płyn mózgowo-rdzeniowy:ilościowy:
Synonyms: całkowity poziom przeciwciał klasy IgA IgA syntetyzowane wewnątrzoponowo IgA syntetyzowane wewnątrzoponowo/IgA całkowite Immunoglobulina A
ru-RURussian (Russian Federation)IgA.интратекально синтезированный/IgA.общий:МассДол:ТчкВрм:ЦСЖ:Колич:
Synonyms: IgA.синтезированный субдурально Количественный Массовая доля Точка во времени;Момент Цереброспинальная жидкость
tr-TRTurkish (Turkey)IgA.intratekal sentezlenen/IgA.total:KütlFr:Zmlı:BOS:Kant:
zh-CNChinese (China)IgA.鞘内型/IgA.总计:质量分数:时间点:脑脊液:定量型:
Synonyms: CSF CSF;脊髓液;Cerebral spinal fluid;脑脊髓液 IgA 总计 IgA.IT;IgA.鞘内;鞘内 IgA;鞘内产生型 IgA;鞘内型 IgA MFr 免疫球蛋白 A 全体数量 全部 共计 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 总 总和 总数 总量 总额 时刻;随机;随意;瞬间 汇总 脊液 脊髓液 脑脊液（Cerebral spinal fluid，CSF） 脑脊髓液

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=68973-7