| Ordering Code | 5211 |
|---|---|
| Test Name | Sodium, 24 Hr Urine |
| Alias | 24 Hr Urine Sodium 24 Hr Urine Na+ |
| Preferred Specimen | Urine, 24 Hour |
| Preferred Container | 24 Hour Urine Container |
| Optimum Volume | 0.5 mL |
| Collection Instructions | Keep refrigerated during collection. 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's first voiding. Do NOT add preservatives. Record entire 24 Hr volume and collection time on container & requisition. |
| Handling Instructions | Send a well-mixed, 50 mL centrifuged aliquot of specimen. |
| Transport Requirements | Oahu: Refrigerated Airline: Refrigerated |
| Specimen Stability | Refrigerated: 7 Days |
| Rejection Criteria | Insufficient quantity, Contaminated, Preservatives used, Specimen older than stability limits, Received ambient |
| Avail. Stat | NO |
| Analytic Time | 1 Day |
| Methodology | Ion Selective Electrode (ISE) |
Reference range(s)
The reference ranges listed below are valid on this date of June 29, 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 Sodium | ALL | 40-220 | 40-220 | mEq/24hr | |||||
| Sodium, Urine | ALL | mEq/L | See report. | ||||||
| Total Volume | ALL | mL | See report. | ||||||
| Total Time | ALL | minutes | See report. |