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Test Code URUN (timed), RUN (random) Urea Nitrogen, Urine

Specimen Type

Urine, Timed (24 hour) or Random collection

Container

Urine, Random: Sterile container with no preservatives or additives.

Timed (12-24hrs): Container with no preservatives or additives.

Preferred Volume

5 mL

Offsite Collection Instructions

  • Collect without additives.  Sample may be random or timed collection.
  • Indicate start date/time and end date/time of 24 hour collection.
  • For timed specimens, send 10 mL of a well mixed sample. Indicate start and end time and total volume.
  • If collection duration is not specified, specimen will be considered a random sample.

UCMC Collection Instructions

Collect without additives.  Sample may be random or timed collection. 
If collection duration is not specified, specimen will be considered a random sample.

Availability

24/7

Turnaround Time

4 hours

STAT Availability

Not Available

Test Usage

Assessment of protein intake and/or nitrogen balance.  

Test Methodology

Spectrophotometric, kinetic

CPT Code

URUN: 84540

RUN: 84540

Test Includes

Quantitative determination of urea nitrogen in urine

Reference Range

Timed: 12 – 20 g/24 hour
 

Random: Reference ranges for random urine specimens have not been established; subject to ordering physician interpretation only.

Critical Results

None

Minimum Volume

2 mL

Fee Code

URUN: 43279

RUN: 43279