Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
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: 2 weeks (avoid repeated freeze/thaw cycles)
|0-4 years||0.7-5.1 mmol/mol creatinine|
|5 years and older||0.2-1.5 mmol/mol creatinine|
Compliance Statement B: For laboratory developed tests not using a RUO kit, and for FDA approved, cleared or 510(k) exempt assays with alterations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
|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