Version 2.78

Status Information

Status
DEPRECATED
Reason
Duplicate
Comment
N-acetylaspartate and N-acetyl-L-aspartate are synonymous concepts, with N-acetyl-L-aspartate being the preferred nomenclature. This term deprecated because it is a duplicate of 33299-9.
Map-To Long Common Name Mapping Guidance
33299-9 N-acetyl-L-aspartate [Presence] in Urine

Part Description

LP28524-4   N-acetylaspartate
N-Acetylaspartic acid, or N-acetylaspartate (NAA), is a derivative of aspartic acid with a formula of C6H9NO5 and a molecular weight of 175.139.

NAA is the second-most-concentrated molecule in the brain after the amino acid glutamate. It is synthesized in neurons from the amino acid aspartic acid and acetyl-coenzyme A. The various functions served by NAA are still under investigation, but the primary proposed functions include its being:

1.A neuronal osmolyte that is involved in fluid balance in the brain
2.A source of acetate for lipid and myelin synthesis in oligodendrocytes, the glial cells that myelinate neuronal axons
3.A precursor for the synthesis of the important neuronal dipeptide N-Acetylaspartylglutamate
4.A contributor to energy production from the amino acid glutamate in neuronal mitochondria.
In the brain, NAA is thought to be present predominantly in neuronal cell bodies, where it acts as a neuronal marker. NAA gives off the largest signal in magnetic resonance spectroscopy of the human brain, and the levels measured there are decreased in numerous neuropathological conditions ranging from brain injury to stroke to Alzheimer's disease. This fact makes NAA a reliable diagnostic molecule for doctors treating patients with brain damage or disease.

NAA may also be a marker of creativity. 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, Wikipedia

Fully-Specified Name

Component
N-acetylaspartate
Property
PrThr
Time
Pt
System
Urine
Scale
Ord
Method

Additional Names

Short Name
Deprecated N-Ac-Asp Ur Ql
Display Name
N-acetylaspartate Ql (U)
Consumer Name Alpha Get Info
N-acetylaspartate, Urine

Basic Attributes

Class
CHEM
Type
Laboratory
First Released
Version 2.03
Last Updated
Version 2.58
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.
Order vs. Observation
Both

Language Variants Get Info

Tag Language Translation
es-AR Spanish (Argentina) N-acetilaspartato:concentración arbitraria:punto en el tiempo:orina:ordinal:
es-ES Spanish (Spain) N-acetilaspartato:PrThr:Punto temporal:Orina:Ord:
es-MX Spanish (Mexico) N-acetilaspartato:Presencia o umbral:Punto temporal:Orina:Ordinal:
et-EE Estonian (Estonia) N-atsetüülaspartaat:PrThr:Pt:U:Ord:
Synonyms: Järgarvuline Juhuslik Uriin
fr-CA French (Canada) N-acétylspartate:Présence-Seuil:Temps ponctuel:Urine:Ordinal:
fr-BE French (Belgium) N-acétylspartate:PrThr:Temps ponctuel:Urine:Ordinal:
it-IT Italian (Italy) N-acetilaspartato:PrThr:Pt:Urine:Ord:
Synonyms: Chimica Presenza o Soglia Punto nel tempo (episodio)
ko-KR Korean (Korea, Republic Of) N-acetylaspartate:임의농도:검사시점:뇨:순위척도:
nl-NL Dutch (Netherlands) N-acetylaspartaat:aanwezigheid:moment:urine:ordinaal:
pt-BR Portuguese (Brazil) N-acetilaspartato:ACnc:Pt:Urina:Ord:
Synonyms: ; N-Ac-Asp; n-acetylaspartic acid; NASP; Arbitrary concentration; Point in time; Random; Ur; UR; Urn; UA; Ql; Ordinal; QL; Qualitative; Qual; Screen; Chemistry
ru-RU Russian (Russian Federation) N-ацетиласпартат:PrThr:ТчкВрм:Моча:Пор:
Synonyms: Порядковый Точка во времени;Момент
tr-TR Turkish (Turkey) N-asetilaspartat:MevcEşik:Zmlı:İdrar:Srl:
Synonyms: Mevcut
zh-CN Chinese (China) N-乙酰天门冬氨酸:存在情况或阈值:时间点:尿液:序数型:
Synonyms: N 型 N-Ac-Asp;NASP;N-乙酰天冬氨酸;N-乙酰门冬氨酸;氮-乙酰基天门冬氨酸 依次型;分类顺序型;定性的;序数型（或称等级型）;性质上的;有序型;有序性分类应答;有序性分类结果;秩次型;等级型;筛查;顺序型 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 存在情况;存在;存在与否;是否存在;阈值;界值;界限;阀值;临界值;存在情况（存在、存在与否、是否存在）或阈值（界值、界限、阀值、临界值） 尿;小便;下泉 时刻;随机;随意;瞬间

LOINC Terminology Service (API) using HL7® FHIR® Get Info

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=29631-9