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Test Code LAB449 Urea Nitrogen, Urine, 24 hour

Specimen Requirement

Refrigerate – no additional preservative is needed.

24-hour urine collection – submit entire collection to laboratory.

 

Referring lab: submit 5.0 mL aliquot from a total 24-hour urine collection.

24-hour total volume is required on request form for processing.

Specimen Stability

2 days at 20-25° C

7 days at 2-8° C 

1 month at -20° C

Testing Schedule

Daily

Reference Range

6 - 17 g/24 Hr

Testing Department

Chemistry

Method

urease with glutamate dehydrogenase

CPT Code

84540

Outpatient Turnaround Time

Within 8 hours of collection

Inpatient STAT Turnaround Time

Not Applicable

Inpatient Routine Turnaround Time

4 hours after receipt