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Mayo Clinic Laboratories

Test Code U24UN Urea Nitrogen, 24 Hour, Urine

Performing Laboratory

ChristianaCare:

  • Newark Campus
  • Wilmington Campus

Methodology

Urease/Colorimetric

Specimen Requirements

Container/Tube:  24-hour urine container supplied. No preservative.
Specimen:  Entire 24-hour urine collection
Collection Instructions:  Refrigerate specimen during collection.

Note:  1. Starting and ending times of collection are required on request form for processing.
2. Follow instructions in “Urine Collections” in “Special Instructions.”

3. Label container with patient’s full name and 1 additional unique patient identifier such as date of birth, medical record number, emergency ID number, date and time of collection, collector’s initials, and type of specimen.

Reference Values

12-20 g/24 hours

Day(s) Test Set Up

Monday through Sunday

Routine Turnaround Time:  not available

STAT Turnaround Time:  not available

Special Instructions