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Laboratory: Clinical Biochemistry  (METABOLIC)
Test Name:
Test Code: OROT
Clinical Information:
Test performed at: This test is used for the evaluation of the differential diagnosis of hyperammonemia and hereditary orotic aciduria.
For question/help: please communicate with the biochemical geneticist.
Method: Colorimetric by Mayo Clinic Laboratories.
Collection Devices:
Specimen Required:
Urine: 10.0 mL
Pediatric Urine: 3.0 mL

Fresh random urine specimen
Urine: 10.0 mL
Pediatric Urine: 3.0 mL

Store and ship frozen as soon as possible  to Metabolic Lab (HSC).
Stability frozen: 30 days
Reference Values:
< 2 weeks:           1.4 - 5.3 µmol/mmol creatinine
2 weeks - 1 year: 1.0 - 3.2 µmol/mmol creatinine
2 - 10 years:         0.5 - 3.3 µmol/mmol creatinine
≥ 11 years:            0.4-1.2 µmol/mmol creatinine
Pregnant women will normally excrete up to twice the upper limit of the adult reference range.
Within 3 Weeks
See Also:
More Information:
If you have any question, please communicate with the Metabolic Lab (HSC): 204-787-4530
Store and send urine frozen to Mayo Medical Laboratories for testing.
Stability: 30 days frozen
CPT Code: 83921