LOINC
Version 2.73

40637-1Kappa light chains.free [Presence] in UrineActive

Part Description

LP29081-4   Immunoglobulin light chains.kappa.free
Healthy patients have the majority of light chains in serum bound to heavy chains. Low levels of free light chains (unbound) are normal due to the over-production and secretion of free light chains by plasma cells. In the kidneys, the free light chains are selectively reabsorbed by the tubular cells, so their presence in urine is likely due to secretion into the urinary tract. Elevation of monoclonal free light chains in serum or urine signal malignant plasma cell proliferation (multiple myeloma), primary amyloidosis, or light chain deposition disease. Elevation of polyclonal free light chains suggests autoimmune diseases such as systemic lupus erythematosus. (Information from Freelite Beckman Coulter IMMAGE II package insert, Version 23, Feb 2009) Source: Regenstrief Institute

Fully-Specified Name

Component
Immunoglobulin light chains.kappa.free
Property
PrThr
Time
Pt
System
Urine
Scale
Ord
Method

Additional Names

Short Name
Kappa LC Free Ur Ql
Display Name
Immunoglobulin light chains.kappa.free Ql (U)
Consumer Name Alpha
Free kappa light chains, Urine

Basic Attributes

Class
CHEM
Type
Laboratory
First Released
Version 2.15
Last Updated
Version 2.73
Change Reason
The PrThr property is used for LOINC terms whose results are reported using an ordered categorical scale, regardless of whether or not an internal threshold was used to make that determination. This change was approved by the Laboratory LOINC Committee in June 2016. The LCN was changed from 'Immunoglobulin light chains kappa.free' to 'Kappa light chains.free' for better readability.
Order vs. Observation
Observation
Common US Lab Results Rank
3945

Member of these Groups

LG16698-9 Immunoglobulin light chains.kappa.free|PrThr|Pt|ANYUrine
LG36221-6 Immunoglobulin light chains.kappa.free|PrThr|Urine

Language Variants Get Info

zh-CNChinese (China)
免疫球蛋白轻链.Kappa 型.游离型:存在情况或阈值:时间点:尿液:序数型:
nl-NLDutch (Netherlands)
immunoglobuline lichte ketens.kappa.vrij:aanwezigheid:moment:urine:ordinaal:
et-EEEstonian (Estonia)
Immuunglobuliinide kerged kapaahelad:PrThr:Pt:U:Ord:
fr-BEFrench (Belgium)
Chaîne légère des immunoglobulines.kappa.libre:PrThr:Temps ponctuel:Urine:Ordinal:
fr-CAFrench (Canada)
Chaîne légère des immunoglobulines.kappa.libre:Présence-Seuil:Temps ponctuel:Urine:Ordinal:
fr-FRFrench (France)
Immunoglobuline chaines légères libres kappa:Présence/Seuil:Ponctuel:Urine:Qualitatif:
it-ITItalian (Italy)
Immunoglobuline, catene leggere.kappa.libere:PrThr:Pt:Urine:Ord:
ko-KRKorean (Korea, Republic of)
유리카파면역글로불린 경쇄:임의농도:검사시점:뇨:순위척도:
pt-BRPortuguese (Brazil)
Imunoglobulinas cadeias leves.kappa.livre:ACnc:Pt:Urina:Ord:
ru-RURussian (Russian Federation)
Иммуноглобулин легкие цепи.каппа.свободные:PrThr:ТчкВрм:Моча:Пор:
es-MXSpanish (Mexico)
Cadenas ligeras de inmunoglobulina kappa.libre:Presencia o umbral:Punto temporal:Orina:Ordinal:
es-ESSpanish (Spain)
Cadenas ligeras kappa libres:PrThr:Punto temporal:Orina:Ord:
tr-TRTurkish (Turkey)
İmmünglobulin hafif zincirler.kappa.serb:MevcEşik:Zmlı:İdrar:Srl:

LOINC FHIR® API Example - CodeSystem Request Get Info

https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=40637-1