22682-9

Ornithine/Creatinine [Molar ratio] in Urine

Active

Part Descriptions

LP15753-4   Ornithine
Ornithine is an amino acid that, under the action of the enzyme arginase on L-arginine, yields urea. Therefore, ornithine is a central part of the urea cycle, which eliminates excess nitrogen. Ornithine is not an amino acid coded by DNA, and in that sense, it is not involved in protein synthesis. In mammalian non-hepatic tissues, however, the urea cycle is mainly involved in arginine biosynthesis, making ornithine an important metabolic process. It is not directly a product of the the genetic code because polypeptides containing unprotected ornithines undergo spontaneous lactamization. This proved to be a problem when ornithine was originally classified among the other 20 naturally occuring amino acids. 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, Ornithine (Wikipedia)

LP15753-4   Ornithine
An amino acid produced in the urea cycle when the enzyme arginase cleaves off urea from arginine. Source: National Library of Medicine, MeSH 2006

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

Fully-Specified Name

Component

Ornithine/Creatinine

Property

SRto

Time

Pt

System

Urine

Scale

Qn

Method

Additional Names

Short Name

Ornithine/Creat Ur-sRto

Display Name

Ornithine/Creatinine (U) [Molar ratio]

Consumer Name Alpha Get Info

Ornithine/Creatinine, Urine

Basic Attributes

Class

CHEM

Type

Laboratory

First Released

Version 1.0n

Last Updated

Version 2.73

Order vs. Observation

Observation

Common Test Rank Get Info

12605

Member of these Panels

Member of these Groups Get Info

Language Variants Get Info

Related Names

• Chemistry
• CR
• Crea
• Creat
• Orn
• Point in time
• QNT
• Quan
• Quant
• Quantitative
• Random
• Scrto
• Substance concentration ratio
• Substance ratio
• UA
• UCr
• UR
• Urn

Example Units

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

Requests to this service require a free LOINC username and password. Below is a sample of the possible capabilities. See the LOINC Terminology Service documentation for more information.

CodeSystem lookup

https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=22682-9

LOINC Copyright

Copyright © 2024 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2024, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.