Orotic Acid, Random, Urine
Use
Evaluation of the differential diagnosis of hyperammonemia and hereditary orotic aciduria. Sensitive indicator of ornithine transcarbamylase (OTC) activity after administration of allopurinol or a protein load to identify OTC carriers.
Special Instructions
Patient's age is required. If not ordering electronically, complete, print, and send a Biochemical Genetics Test Request (T798) with the specimen. Biochemical Genetics Patient Information (T602) form available.
Limitations
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. Pregnant women will normally excrete up to twice the upper limit of the adult reference range. The interpretation must be correlated with clinical and other laboratory findings.
New York Approved
Methodology
Mass Spectrometry (LC-MS/MS)
Biomarkers
LOINC Codes
- 17869-9
- 17869-9
Result Turnaround Time
3-7 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
3 mL
Minimum Volume
2 mL
Container
Plastic, 10‑mL urine tube
Collection Instructions
Collect a random urine specimen. No preservative needed.
Causes for Rejection
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Stability Requirements
| Temperature | Period |
|---|---|
| Frozen | 90 days |