Test Code UUN24 Urea Nitrogen Urine, Timed LAB449
Performing Laboratory
UnityPoint Finley Hospital
Test Method
Enzymatic; Roche Cobas Pro.
Performance
Testing is performed Monday through Sunday.
Typically assayed within 2 hours after specimen arrives at testing site.
Specimen Requirement
0.5 mL urine is required.
Collect a 24 hour urine specimen in a sterile container. No preservative is required. Keep the specimen chilled during the collection period. Label the specimen appropriately with two identifiers, patient name and another identifier, (patient ID number, DOB, etc.) include specimen source, date and time of
collection. Record the collection time period on the label and specimen container. Store the urine specimen refrigerated and transport to the lab within 48 hours.
Useful For
Assessment of protein intake and/or nitrogen balance
Reference Values
12 – 20 gm/24 hours
CPT Code Information
84540 Chemistry: Urea Nitrogen; Urine