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Test ID RURAU Urea, Random, Urine

Useful For

Assessment of renal failure (prerenal vs acute kidney injury)

Method Name

Kinetic Ultraviolet Assay

Reporting Name

Urea, Random, U

Specimen Type


Specimen Required

Container/Tube: Plastic, 5-mL tube (T465)

Specimen Volume: 4 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 14 days
  Frozen  14 days

Reference Values

No established reference values

Day(s) and Time(s) Performed

Monday through Sunday; Continuously  

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
RURAU Urea, Random, U In Process


Result ID Test Result Name Result LOINC Value
URCON Urea, Random, U 3092-4
CREA5 Creatinine Concentration 2161-8
RATO4 Urea/Creatinine Ratio 40487-1

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.