Urea Nitrogen Urine 24 Hour

SIM

12620 

CPT

84545 

Synonyms

24 Hour Urine UUN 

Specimen Type

Voided 24 hour Urine 

Container

24 hour urine container

Collection Instructions

•  Collect all urine voided for 24 hours and place in the 24 hour urine container. 
•  The collection container is to be kept in the refrigerator or on ice during the timed period. 
•  Note the number of hours of urine collection on the aliquot.

Volume

Max: 5 ml preferred 
Min:  1 ml 

Additional Information

none

Patient Preparation

none

Specimen Processing Instructions

Refrigerate

Note the number of hours of urine collection on the aliquot.

Transport Requirements

Refrigerated

Specimen Stability

Refrigerated: 72 hours 

Rejection Criteria

Insufficient volume

Reference Range

12,000 – 20,000 mg / 24 hours

Critical Value

none 

Test Includes

Urine Urea Nitrogen result with a calculation for a 24 hour collection. 

Methodology

Enzymatic Conductivity Rate method 

Testing Frequency

Daily, Monday - Sunday 

Reviewed By

Sandy Hammett 

Reviewed Date

1/31/2018

Supplemental