| Ordering Code | 824 |
|---|---|
| Test Name | Urea Nitrogen, 24 Hr Urine |
| Alias | 24 Hour Urine Urea Nitrogen UUN |
| Preferred Specimen | Urine, 24 Hour |
| Preferred Container | 24 Hour Urine Container |
| Optimum Volume | 1 mL |
| Collection Instructions | Keep refrigerated during collection 24 Hour collections: Do not include first morning specimen; collect all subsequent voidings. The last sample collected should be the first morning specimen voided the following morning at the same time as the previous morning first voiding Record entire 24 Hr Volume on container and requisition No preservatives added. |
| Handling Instructions | Send a well-mixed, 50 mL aliquot of specimen Processing: Adjust pH to less than 4 before storage. |
| Transport Requirements | Oahu: Refrigerated Airline: Refrigerated |
| Specimen Stability | Refrigerated: 7 Days |
| Rejection Criteria | Specimen older than stability limits |
| Avail. Stat | NO |
| Analytic Time | 1 Day |
| Methodology | Enzymatic - Urease GLDH |
Reference range(s)
The reference ranges listed below are valid on this date of July 15, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| 24-Hr Urine Urea Nitrogen | ALL | 7-16 | 7-16 | gm/24hr | |||||
| Urea Nitrogen, Urine | ALL | mg/dL | See report. | ||||||
| Total Volume | ALL | mL | See report. | ||||||
| Total Time | ALL | minutes | See report. |