LOINC
Version 2.73

17534-9Rheumatoid factor [Units/volume] in Body fluid by ImmunoassayActive

Part Descriptions

LP16738-4   Rheumatoid factor
Rheumatoid factor (RF or RhF) is a blood test performed in patients with suspected rheumatoid arthritis (RA). It is an auto-antibody directed against the Fc portion of IgG, which is itself an antibody. RF and IgG form immune complexes, which are part of the disease process (serum sickness) of various rheumatological diseases. Storage/Transport Temperature: 1 mL plasma or serum, 2-8°C. (Min: 0.2 mL) Submit specimen in an ARUP Amber Transport Tube. Rheumatoid factor can also be a cryoglobulin (antibody that precipitates on cooling of a blood sample); it can be either type 2 (monoclonal IgM to polyclonal IgG) or 3 (polyclonal IgM to polyclonal IgG) cryoglobulin. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See http://creativecommons.org/licenses/by-sa/3.0/ for details. Source: Wikipedia, Rheumatoid factor (Wikipedia)

LP16738-4   Rheumatoid factor
Antibodies found in adult rheumatoid arthritis patients that are directed against gamma-chain immunoglobulins. Source: National Library of Medicine, MeSH 2006

LP7238-1   Body fld
The LOINC "Body fld" System represents body fluids other than serum, plasma, blood, urine, and cerebrospinal fluid. When a LOINC term with the System "Body fld" is used, the specific specimen source or body fluid type should be reported elsewhere with the result. Where more specific terms for pleural, peritoneal, synovial fluid, etc. exist, we encourage you to use the more specific terms. In contrast to "Body fld", the System "Asp" in LOINC represents the fluid withdrawn during an aspiration procedure from an abnormal collection of fluid, such as from an abscess or cyst. "Asp" is used for abnormal fluid collections that are aspirated, while "Body fld" is used for named body fluids, such as synovial fluid or peritoneal fluid, that are not inherently pathologic. Source: Regenstrief LOINC

Fully-Specified Name

Component
Rheumatoid factor
Property
ACnc
Time
Pt
System
Body fld
Scale
Qn
Method
IA

Additional Names

Short Name
Rheumatoid fact Fld IA-aCnc
Display Name
Rheumatoid factor IA Qn (Body fld)
Consumer Name Alpha
Rheumatoid factor, Body fluid

Basic Attributes

Class
SERO
Type
Laboratory
First Released
Version 1.0l
Last Updated
Version 2.56
Change Reason
The EIA method, which was always intended to cover more than just enzyme-linked immunoassay and whose display name for the long common name has always been Immunoassay, was renamed IA in order to eliminate ambiguity about whether the method has a broader meaning than just enzyme-linked immunoassay. Likewise, EIA.rapid was renamed IA.rapid. These changes were approved by the Laboratory LOINC Committee in June 2016.
Order vs. Observation
Both

Member of these Groups

LG3254-2 Rheumatoid factor|ACnc|Pt|Body fld

Language Variants Get Info

zh-CNChinese (China)
类风湿因子:任意型浓度:时间点:体液:定量型:免疫测定法
nl-NLDutch (Netherlands)
reumafactor:eenheid/volume:moment:lichaamsvocht:kwantitatief:immunoassay
et-EEEstonian (Estonia)
Reumatoidfaktor:Acnc:Pt:Fx:Qn:IA
fr-BEFrench (Belgium)
Facteur rhumatoïde:Concentration arbitraire:Temps ponctuel:Liquide biologique:Quantitatif:IA
fr-CAFrench (Canada)
Facteur rhumatoïde:Concentration arbitraire:Temps ponctuel:Liquide biologique:Quantitatif:IA
fr-FRFrench (France)
Facteurs rhumatoïdes:Arbitraire/Volume:Ponctuel:Liquide biologique:Numérique:Immunoanalyse
de-DEGerman (Germany)
Rheumafaktor:Arbiträre Konzentration:Zeitpunkt:Körperflüssigkeit:Quantitativ:Immunoassay
el-GRGreek (Greece)
Ρευματοειδής παράγοντας:Αυθαίρετη συγκέντρωση:Χρονική στιγμή:Σωματικό υγρό:Ποσοτική:IA
it-ITItalian (Italy)
Fattore reumatoide:ACnc:Pt:Liquido corporeo:Qn:IA
ko-KRKorean (Korea, Republic of)
류마티스 인자:임의농도:검사시점:체액:정량:효소면역측정법
pl-PLPolish (Poland)
czynnik reumatoidalny:Stężenie umowne:Punkt w czasie:Płyn ustrojowy:ilościowy:metoda immunochemiczna
pt-BRPortuguese (Brazil)
Fator reumatóide:ACnc:Pt:LiqOrg:Qn:Imunoensaio
ru-RURussian (Russian Federation)
Ревматоидный фактор:ПроизвКонц:ТчкВрм:Тело ждк:Колич:IA
es-ARSpanish (Argentina)
factor reumatoideo:concentración arbitraria:punto en el tiempo:líquido corporal, no especificado:cuantitativo:enzimoinmunoanálisis
es-MXSpanish (Mexico)
Factor reumatoide:Concentración arbitraria:Punto temporal:Fluído corporal:Cuantitativo:Inmunoensayo
es-ESSpanish (Spain)
Factor Reumatoide:Concentración arbitraria:Punto temporal:Fluido corporal:Qn:IA
tr-TRTurkish (Turkey)
Romatoid faktör:SçKons:Zmlı:Vücut sv:Kant:İA

Example Units

Unit Source
[IU]/mL Example UCUM Units

LOINC FHIR® API Example - CodeSystem Request Get Info

https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=17534-9