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Test Code SQ UUN24, EPIC LAB449 Urea Nitrogen, Quantitative, 24 Hour, Urine


Kinetic with Urease and Glutamate Dehydrogenase

Performing Laboratory

Meriter Laboratories

Specimen Requirements

Specimen Type: Urine, 24-hour collection
Container/Tube: Plastic urine container
Specimen Volume: 20 mL

Collection Instructions:

1. Collect urine for 24 hours.

2. No preservative. Refrigerate specimen during collection.

3. Follow instructions in Urine Collection in Special Instructions.

4. Mix well before taking aliquot.

Additional Information:

1. 24-Hour volume is required.

2. If not equipped to accurately measure total urine volume, forward entire collection to Meriter Laboratories.

Specimen Transport Temperature


Reference Values

12-20 g/(24.h)

Day(s) Test Set Up

Monday through Sunday

Analytical Time


1 hour


4 hours

Test Classification and CPT Coding

84540-Urea nitrogen

81050-Urine timed measurement (non-aliquoted specimen only)

Special Instructions

Specimen Requirements Additional Information

Specimen Stability:

Urine is stable at ambient temperature (15o C-25o C) for 2 days, refrigerated (2o C-8o C) for 7 days, and frozen (≤-15o C) for 1 months.