Version 2.78

Part Description

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

Fully-Specified Name

Component
Urea nitrogen
Property
SCnc
Time
24H
System
Urine
Scale
Qn
Method

Additional Names

Short Name
UUN 24h Ur-sCnc
Display Name
Urea nitrogen (24H U) [Moles/Vol]
Consumer Name Alpha Get Info
Urea Nitrogen (BUN), Urine

Basic Attributes

Class
CHEM
Type
Laboratory
First Released
Version 2.09
Last Updated
Version 2.70
Order vs. Observation
Both

Member of these Groups Get Info

LOINC Group Group Name
LG49761-6 Urea nitrogen|24H|Urine
LG34844-7 Urea nitrogen|SCnc|Urine

Language Variants Get Info

Tag Language Translation
de-DE German (Germany) Harnstoff-Stickstoff:Stoffmengenkonzentration:24 Stunden:Urin:Quantitativ:
el-GR Greek (Greece) Άζωτο ουρίας:Συγκέντρωση ουσίας:24 ώρες:Ούρα:Ποσοτική:
es-AR Spanish (Argentina) nitrógeno ureico:concentración de sustancia:24 horas:orina:cuantitativo:
es-ES Spanish (Spain) Nitrógeno ureico:Concentración de sustancia:24 horas:Orina:Qn:
Synonyms: Cuantitativo
es-MX Spanish (Mexico) Nitrógeno de urea:Concentración de sustancias:24H:Orina:Cuantitativo:
fr-CA French (Canada) Azote uréique:Concentration de substance:24 h:Urine:Quantitatif:
fr-FR French (France) Azote uréique:Moles/Volume:24H:Urine:Numérique:
fr-BE French (Belgium) Azote uréique:Concentration de substance:24 h:Urine:Quantitatif:
Synonyms: BUN
it-IT Italian (Italy) Azoto ureico:SCnc:24h:Urine:Qn:
Synonyms: 24 Ore Chimica Concentrazione di Sostanza
ko-KR Korean (Korea, Republic Of) 요소 질소:물질농도:24시간:뇨:정량:
nl-NL Dutch (Netherlands) ureumstikstof:mol/volume:24 uur:urine:kwantitatief:
Synonyms: 24U
pl-PL Polish (Poland) Azot mocznika:stężenie molowe:24 godziny:mocz:ilościowy:
pt-BR Portuguese (Brazil) Uréia nitrogenada:SCnc:24H:Urina:Qn:
Synonyms: ; Urea Nit; UN; Blood urea nitrogen; N2; N; Substance concentration; Level; 1 day; 24 hours; 24HR; UR; Urn; UA; Quantitative; QNT; Quant; Quan; Chemistry; UUN
ru-RU Russian (Russian Federation) Азот мочевины крови:МолКонц:24 часа:Моча:Колич:
Synonyms: Количественный Молярность;Молярная объёмная концентрация
tr-TR Turkish (Turkey) Üre azotu:SubKons:24Sa:İdrar:Kant:
Synonyms: Nitrojen
zh-CN Chinese (China) 尿素氮:物质的量浓度:24小时:尿液:定量型:
Synonyms: 1天;1日;24.0小时;一天;一日;二十四个小时;二十四小时 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 N;N2;Nit;氮气 UUN 克分子浓度;克分子浓度(单位体积);摩尔浓度;摩尔浓度(单位体积);物质的量浓度(单位体积) 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 尿;小便;下泉 尿尿素氮 尿液尿素氮（Urine Urea nitrogen，UUN） 尿液脲氮 尿脲氮

Example Units

Unit Source
mmol/L 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=33355-9