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Test Code URUNT or LAB449 Urea Nitrogen, 24-Hour, Urine

Profile Information

Test ID

Reporting Name

Always Performed?

Available Separately?
URUNT

Urea Nitrogen, 24-Hour, Urine

Y

N
UUNR

Urea Nitrogen, Random Urine

Y

Y

Coll Dur

Collection Duration

Y

N

Ur Vol

Urine Volume

Y

N

Specimen Requirements

Container Type:

 

24-hour urine container

 

   

 
Optimal Collection Volume: 

Entire Collection
Minimum Volume:

Entire Collection
Collection Instructions:
  1. Please click the Mayo link for a complete list of acceptable preservatives.
  2. Refrigerate the container during the collection period.
  3. The 24-hour volume is required.
  4. The start and end dates and times of collection are required.
  5. Please click the Urine Collection and Patient Instructions for 24-Hour Urine Collection links for additional collection instructions.
Specimen Transport:

Refrigerate

Processing Instructions: 
  1. Measure and record the total volume of the urine collection.
  2. Vigorously shake the entire urine container to ensure all its contents are adequately mixed.
  3. Pour off a portion of the urine into a false bottom tube.
  4. Centrifuge the false bottom tube. 

Specimen Stability

Specimen Type

Temperature

Time

Urine

Refrigerated

7 days

Room Temperature

2 day
Frozen 1 month

 

Specimen Rejection Criteria

No total volume recorded or no start and end times.

Methodology

Roche Cobas - Kinetic test with urease and glutamate dehydrogenase

Reference Ranges

10-24 g/ 24 hours

Day(s) Performed

24/7

Expected TAT

Same day

Performing Laboratory

Bronson Laboratory, Chemistry - Kalamazoo and Battle Creek

Sample Retention Time

7 days

CPT Code

  • Urine Urea Nitrogen - 84540
  • Volume measurement - 81050

LOINC Code

3095-7