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Test Code OROT Orotic Acid, Random, Urine

Reporting Name

Orotic Acid, U

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

Method Name

Colorimetric

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Urine


Necessary Information


1. Patient's age is required.

2. Provide a reason for testing.



Specimen Required


Supplies: Urine Tubes, 10 mL (T068)

Container/Tube: Plastic, 10-mL urine tube

Specimen Volume: 10 mL

Collection Instructions:

1. Collect a random or timed urine specimen.

2. No preservative needed.


Specimen Minimum Volume

3 mL

Reject Due To

  All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Frozen 30 days

Reference Values

<2 weeks: 1.4-5.3 mmol/mol creatinine

2 weeks-1 year: 1.0-3.2 mmol/mol creatinine

2-10 years: 0.5-3.3 mmol/mol creatinine

≥11 years: 0.4-1.2 mmol/mol creatinine

Day(s) Performed

Tuesday, Thursday

CPT Code Information

83921

LOINC Code Information

Test ID Test Order Name Order LOINC Value
OROT Orotic Acid, U 17869-9

 

Result ID Test Result Name Result LOINC Value
8905 Orotic Acid, U 17869-9

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

Report Available

4 to 8 days