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Test Code UUN24 Urea Nitrogen Urine, Timed LAB449

Performing Laboratory

UnityPoint The Finley Hospital

Test Method

Kinetic test with urease and glutamate dehydrogenase; 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.

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

LOINC Code Information

12967-6 Urea Nitrogen [Mass/Volume] In 24 Hour Urine

Additional Specimen Collection Information

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.