Specimen Requirements
Title
UREA NITROGEN, URINE 24HR
Specimen Requirement
24 hour urine collection preferred. Refrigerate during collection. Record total volume on aliquot of urine and lab order.
Random urine is also acceptable; submitted in sterile screw-capped container.
Methodology
Stability
7 days refrigerated
Reference Range
By Report
Turnaround
24 hours
Clinical Use
Renal function test; coarse nitrogen-wasting test on patients on hyperalimentation; indicate nitrogen balance in hyperalimentation; rule out tap of urinary bladder in amniocentesis, paracentesis
Test Code
UUNM