Version 2.78

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

Fully-Specified Name

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

Additional Names

Long Common Name
Rheumatoid factor [Units/volume] in Serum by Immunoassay
Short Name
Rheumatoid fact Ser IA-aCnc
Display Name
Rheumatoid factor IA Qn (S)
Consumer Name Alpha Get Info
Rheumatoid factor, Blood

Basic Attributes

Class
SERO
Type
Laboratory
First Released
Version 1.0h(2)
Last Updated
Version 2.73
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
Common Test Rank Get Info
6513

Member of these Groups Get Info

LOINC Group Group Name
LG357-0 Rheumatoid factor|ACnc|Pt|ANYBldSerPl

Language Variants Get Info

Tag Language Translation
de-DE German (Germany) Rheumafaktor:Arbiträre Konzentration:Zeitpunkt:Serum:Quantitativ:Immunoassay
el-GR Greek (Greece) Ρευματοειδής παράγοντας:Αυθαίρετη συγκέντρωση:Χρονική στιγμή:Ορός:Ποσοτική:IA
Synonyms: RF
es-MX Spanish (Mexico) Factor reumatoide:Concentración arbitraria:Punto temporal:Suero:Cuantitativo:Inmunoensayo
es-ES Spanish (Spain) Factor Reumatoide:Concentración arbitraria:Punto temporal:Suero:Qn:IA
Synonyms: Cuantitativo
es-AR Spanish (Argentina) factor reumatoideo:concentración arbitraria:punto en el tiempo:suero:cuantitativo:enzimoinmunoanálisis
et-EE Estonian (Estonia) Reumatoidfaktor:Acnc:Pt:S:Qn:IA
Synonyms: Juhuslik Kvantitatiivne Seerum
fr-CA French (Canada) Facteur rhumatoïde:Concentration arbitraire:Temps ponctuel:Sérum:Quantitatif:IA
fr-FR French (France) Facteurs rhumatoïdes:Arbitraire/Volume:Ponctuel:Sérum:Numérique:Immunoanalyse
fr-BE French (Belgium) Facteur rhumatoïde:Concentration arbitraire:Temps ponctuel:Sérum:Quantitatif:IA
Synonyms: RF
it-IT Italian (Italy) Fattore reumatoide:ACnc:Pt:Siero:Qn:IA
Synonyms: Concentrazione Arbitraria FR Immunoassay Punto nel tempo (episodio) Siero Sierologia (anticorpi e la maggior parte degli ant
ko-KR Korean (Korea, Republic Of) 류마티스 인자:임의농도:검사시점:혈청:정량:효소면역측정법
nl-NL Dutch (Netherlands) reumafactor:eenheid/volume:moment:serum:kwantitatief:immunoassay
Synonyms: IA
pl-PL Polish (Poland) Czynnik reumatoidalny:stężenie w jednostkach umownych:punkt w czasie:surowica:ilościowy:metoda immunologiczna
pt-BR Portuguese (Brazil) Fator reumatóide:ACnc:Pt:Soro:Qn:Imunoensaio
Synonyms: ; Rheumatoid fact; RF; Arbitrary concentration; Point in time; Random; Serum; SR; Quantitative; QNT; Quant; Quan; Enzyme immunoassay; ELISA; MEIA; SUDS; ELFA; IAA; Fac; Fact; Serology
ru-RU Russian (Russian Federation) Ревматоидный фактор:ПроизвКонц:ТчкВрм:Сыв:Колич:IA
Synonyms: Количественный Произвольная концентрация Сыворотка Точка во времени;Момент
tr-TR Turkish (Turkey) Romatoid faktör:SçKons:Zmlı:Ser:Kant:İA
Synonyms: İmmünölçüm, immünoassay
zh-CN Chinese (China) 类风湿因子:任意型浓度:时间点:血清:定量型:免疫测定法
Synonyms: RF;Rheumatoid Factor 任意型浓度(单位体积);任意浓度;单位体积的任意单位数;人工型浓度 免疫测定;免疫分析法;免疫检定法;免疫检定;免疫试验;酶免疫测定法;酶免疫测定;酶免疫分析法;酶免疫检定法;酶免疫检定;酶免疫试验 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 因素 时刻;随机;随意;瞬间 系数 血清;血清学;血清学检验项目;血清学检验项目 (非微生物学);血清学检验项目（非微生物学）;血清学检验项目类;血清学检验项目类 (非微生物学);血清学类;血清学类检验项目;血清学类检验项目 (非微生物学);血清学类试验;血清学类试验 (非微生物学);血清学试验;血清学试验 (非微生物学);血清学试验（非微生物学）;血清学试验类 (非微生物学);血清类

Example Units

Unit Source
[IU]/mL 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=6928-6