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HelpTest ID OROT Orotic Acid, Random, Urine
Useful For
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
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineNecessary Information
Patient's age is required.
Specimen Required
Supplies: Urine Tubes, 10 mL (T068)
Container/Tube: Plastic, 10-mL urine tube
Specimen Volume: 3 mL
Collection Instructions:
1. Collect a random urine specimen.
2. No preservative needed.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Frozen | 90 days |
Reference Values
≤6 years: ≤4 mmol/mol creatinine
7-18 years: ≤3 mmol/mol creatinine
≥19 years: ≤5 mmol/mol creatinine
Day(s) Performed
Tuesday, Thursday
CPT Code Information
83921
Report Available
3 to 7 daysReject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Forms
1. Biochemical Genetics Patient Information (T602)
2. If not ordering electronically, complete, print, and send a Biochemical Genetics Test Request (T798) with the specimen.