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AminoaciduriaDefinitionAminoaciduria is an abnormal amount of amino acids in the urine. Amino acids are the building blocks for proteins in the body. This article discusses the test used to look for increased amounts of amino acids in the urine. See also: Alternative NamesAmino acids - urine; Urine amino acidsHow the Test is PerformedA clean-catch urine sample is needed. This is often done at your doctor's office or health clinic. How to Prepare for the TestNo special preparations are necessary. Make sure your doctor knows about all the medicines you or your child are taking or have recently used. If this test is being done on an infant who is breast-feeding, make sure the health care provider knows what medicines the nursing mother is taking. How the Test Will FeelThe test involves only normal urination. Why the Test is PerformedThis test is done to measure amino acid levels in the urine. There are many different types of amino acids. It is common for some of each kind to be found in the urine, but increased levels of individual amino acids can be a sign of an inborn error of metabolism. Normal Results
Note: All values are in micro mole per deciliter (micro mol/dL) What Abnormal Results MeanIncreased total urine amino acids may be due to:
ConsiderationsFailure to have the urine sample promptly evaluated in the laboratory alters the results of the test. This test is ineffective if the baby is under 6 weeks old and has not been fed dietary protein in the last 48 hours. Urine chromatography is necessary to accurately measure increased levels of specific amino acids. Screening infants for increased levels of amino acids can lead to early diagnosis of an inborn error of metabolism. If the condition is promptly treated, complications such as severe mental retardation may be prevented.
Review Date:
5/25/2007 Reviewed By: Daniel R Alexander, MD, Department of Internal Medicine, St. Mary's Hospital, Leonardtown, MD. Review provided by VeriMed Healthcare Network. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997-
A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.  |
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