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Test Code UUREA Urea Nitrogen, Urine, LAB748

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements

Container/Tube:

Preferred: random urine collection

Specimen Volume: 0.5 mL from a random urine collection.

Stability: Urine urea nitrogen is stable at 4-8°C for 4 days.

Reference Values

No established reference values

Useful For

Measurements of urine urea nitrogen are used in the diagnosis and treatment of certain renal and metabolic diseases.

Day(s) Test Set Up

Monday through Sunday

Methodology

Urease with Glutamate Dehydrogenase (GLDH)

Note: A 24-hour urine collection is the preferred specimen. See test code UUN24 Urea Nitrogen, Urine, Timed, LAB449.

Test Classification and CPT Coding

84540