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HelpUrea Nitrogen, Urine, Random
Performing Lab(s)
Memorial-Belleville only
Specimen Requirement (s)
Specimen Type: urine
Container/Tube: urine collection plastic container
Specimen Volume: 10 mL
Specimen Minimum Volume: 2 mL or urine
Collection Instructions: deliver to lab within 2 hours of collection time.
Lab instructions: NA
Day(s)/Shift(s) Test Set Up and Turnaround Time
Sunday through Saturday
Hours: 24 hours
Turnaround Time:
TAT: No
Routine: less than 8 hours from receipt
Transport and Stability
Transport temperature: Ambient to lab
Reference Values
No established reference intervals
Note: Calculation of nitrogen balance
requires knowledge of 24-hour urea nitrogen and daily protein
intake. Use the following formula: nitrogen balance=daily protein
intake (g)/6.25-(24 hour urine urea nitrogen+3 or 4*).
*Use 4 if diarrhea is present.
Literature Reference:
Rifai N, Horvath AR, Wittwer AT eds: Textbook of Clinical Chemistry and Molecular Diagnostics 6 th ed: Chapter 32, p. 479, Elsevier, St. Louis, MO 2018.
CPT/LOINC Codes
84540