Version 2.78

Part Descriptions

LP14492-0   Urea nitrogen
Urea nitrogen is the waste product formed in the liver when proteins are broken down into their respective amino acids. Once proteins are metabolized in the liver, urea nitrogen is released from the liver to the kidneys via the bloodstream. The kidneys then filter the urea nitrogen out of the bloodstream into the urine. Although the kidneys filter out most of the urea nitrogen in the blood, small traces of stable urea nitrogen remain in circulation. To evaluate kidney function, a blood urea nitrogen test (BUN test) is conducted. High amounts of urea nitrogen in the BUN test indicate complications with kidney function or decreased blood flow to the kidneys. A decrease in urea nitrogen in the BUN test is indicative of severe liver disease or malnutrition. [Lab Tests Online:bun/tab/sample/] Source: Regenstrief LOINC

LP32035-5   Creatinine
Creatinine or creatine anhydride, is a breakdown product of creatine phosphate in muscle. The loss of water molecule from creatine results in the formation of creatinine. It is transferred to the kidneys by blood plasma, whereupon it is eliminated by glomular filtration and partial tubular excretion. Creatinine is usually produced at a fairly constant rate and measuring its serum level is a simple test. A rise in blood creatinine levels is observed only with marked damage to functioning nephrons; therefore this test is not suitable for detecting early kidney disease. Creatine and creatinine are metabolized in the kidneys, muscle, liver and pancreas. Copyright Copyright ©2005-2009 Genome Alberta (Reference to original publication: Wishart DS, Knox C, Guo AC, et al. HMDB: a knowledgebase for the human metabolome. Nucleic Acids Res. 2009 37(Database issue):D603-610.) Source: Human Metabolome Database, Creatinine

Reference Information

Type Source Reference
Webcontent Lab Tests Online®Copyright Copyright © 2021 Lab Tests Online. All rights reserved. Blood Urea Nitrogen (BUN)

Fully-Specified Name

Component
Urea nitrogen/Creatinine
Property
MRto
Time
Pt
System
Ser/Plas
Scale
Qn
Method

Additional Names

Short Name
BUN/Creat SerPl
Display Name
Urea nitrogen/Creatinine [Mass ratio]
Consumer Name Alpha Get Info
Urea Nitrogen (BUN)/Creatinine, Blood

Basic Attributes

Class
CHEM
Type
Laboratory
First Released
Version 1.0
Last Updated
Version 2.73
Order vs. Observation
Both
Common Test Rank Get Info
109

Member of these Panels

LOINC Long Common Name
24320-4 Basic metabolic 1998 panel - Serum or Plasma
24321-2 Basic metabolic 2000 panel - Serum or Plasma
70219-1 Basic metabolic 2008 panel with ionized calcium - Serum or Plasma
89044-2 Basic metabolic and albumin panel - Serum or Plasma
24322-0 Comprehensive metabolic 1998 panel - Serum or Plasma
24323-8 Comprehensive metabolic 2000 panel - Serum or Plasma
24362-6 Renal function 2000 panel - Serum or Plasma

Member of these Groups Get Info

LOINC Group Group Name
LG12083-8 Urea nitrogen/Creatinine|MRto|Pt|ANYBldSerPl

Language Variants Get Info

Tag Language Translation
es-AR Spanish (Argentina) nitrógeno ureico/creatinina:relación de concentración de masa:punto en el tiempo:suero/plasma:cuantitativo:
es-ES Spanish (Spain) Nitrógeno ureico/Creatinina:Relacion de Masa:Punto temporal:Suero o Plasma:Qn:
Synonyms: Cuantitativo
es-MX Spanish (Mexico) Nitrógeno ureico / Creatinina:Relación de masa:Punto temporal:Suero o Plasma:Cuantitativo:
fr-CA French (Canada) Azote uréique/Créatinine:Ratio de masse:Temps ponctuel:Sérum/Plasma:Quantitatif:
fr-FR French (France) Azote uréique/créatinine:Masse ratio:Ponctuel:Sérum/Plasma:Numérique:
fr-BE French (Belgium) Azote uréique/Créatinine:Ratio de masse:Temps ponctuel:Sérum/Plasma:Quantitatif:
Synonyms: BUN Rapport de masse
it-IT Italian (Italy) Azoto ureico/Creatinina:MRto:Pt:Siero/Plasma:Qn:
Synonyms: Chimica Plasma Punto nel tempo (episodio) Rapporto di Massa Siero Siero o Plasma
ko-KR Korean (Korea, Republic Of) 요소 질소/크레아티닌:질량농도비:검사시점:혈청/혈장:정량:
nl-NL Dutch (Netherlands) ureumstikstof/creatinine:massaverhouding:moment:serum of plasma:kwantitatief:
Synonyms: kreatinine
pl-PL Polish (Poland) Azot mocznika/kreatynina:współczynnik masowy:punkt w czasie:surowica lub osocze:ilościowy:
pt-BR Portuguese (Brazil) Uréia nitrogenada/Creatinina:MCrto:Pt:Sor/Plas:Qn:
Synonyms: ; Urea Nit; UN; Blood urea nitrogen; N2; N; Creat; CR; mRto; Mass concentration ratio; Point in time; Random; SerPl; SerPlas; SerP; Serum; SR; Plasma; Pl; Plsm; Quantitative; QNT; Quant; Quan; Chemistry; BUN
ru-RU Russian (Russian Federation) Азот мочевины крови/Креатинин:МассОтн:ТчкВрм:Сыв/Плаз:Колич:
Synonyms: Количественный Масс отношение Плазма Сыворотка Сыворотка или Плазма Точка во времени;Момент
tr-TR Turkish (Turkey) Üre azotu/Kreatinin:KütlOr:Zmlı:Ser/Plaz:Kant:
Synonyms: Nitrojen
uk-UA Ukrainian (Ukraine) Азот сечовини/креатинін:Масове Співвідношення:МоментЧасу:Сироватка/Плазма:Кількісно:
Synonyms: Blood urea nitrogen; BUN; Chemistry; CR; Crea; Creat; Kidney; Mass concentration ratio; Mass ratio; MCRto; N; N2; Nephrology; Nit; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Renal; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; UN; UniversalLabOrders
zh-CN Chinese (China) 尿素氮/肌酐:质量比率:时间点:血清/血浆:定量型:
Synonyms: BUN BUN;UN;血尿素氮;血尿素氮（Blood urea nitrogen，BUN，尿素氮）;血液尿素氮 CO(NH2)2;碳酰二胺;脲 CR;Creat;肌氨酸酐;肌酸内酰胺;肌酸酐 N;N2;Nit;氮气 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 肌酸内酰胺 血清/血浆脲氮 血清或血浆

Example Units

Unit Source
mg/mg{creat} 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=3097-3