Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
New York DOH Approval Status
First catch urine. Also acceptable: Random urine.
Specimen must be stored refrigerated until frozen. Transfer 2 mL urine to an ARUP standard transport tube and freeze immediately. (Min: 1 mL)
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Urine specimens containing preservatives.
Ambient: Unacceptable; Refrigerated: 24 hours; Frozen: 30 days (avoid repeated freeze/thaw cycles)
|0-4 years||Less than or equal to 5.1 mmol/mol creatinine|
|5 years and older||Less than or equal to 1.5 mmol/mol creatinine|
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the U.S. Food and Drug Administration. This test was performed in a CLIA-certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|0060096||Orotic Acid, Urine - Interpretation||48767-8|
- Argininosuccinic aciduria
- Cit I
- Citrullinemia I
- Hereditary orotic aciduria
- Hyperornithinemia, hyperammonemia, LPI
- Lysinuric protein intolerance
- Ornithine transcarbamylase deficiency
- Uridine monophosphate synthesis