Organic Acids, Urine
Liquid chromatography - tandem mass spectrometry (LC-MS/MS)
Monday - Friday (days); STAT testing is available at other times after consultation with the laboratory director.
Within 5 business days
This test is used to evaluate metabolic acidosis with increased anion gap, as well as to diagnose and monitor genetic and non-genetic disorders of amino acid and fatty acid metabolism and Kreb cycle.
- Excretions of characteristic metabolites may not be elevated in some disorders when the patient is asymptomatic.
- Not all intermediates of amino acid and organic acid metabolism are identified with this test.
- Normal results on urine organic acid analysis does not exclude an inherited metabolic disorder as the etiology of the patient’s symptoms.
- Ambient: 4 hours
- Refrigerated: 4 days
- Frozen: 4 weeks
- Urine grossly contaminated with stool