| Ordering Code | 156 |
|---|---|
| Test Name | Creatinine Clearance, Urine |
| Alias | 24 Hr Urine Creatinine Clearance |
| Preferred Specimen | Urine, 24 Hour and Serum |
| Preferred Container | 24 Hour Urine Container and Serum, SST (Gold) |
| Other Specimen/Container | Plasma in Lithium Heparin (Green), Serum in Plain (Red) Random urine collection is not acceptable. |
| Optimum Volume | Serum/Plasma = 1 mL Urine = 1 mL |
| Collection Instructions | Record entire 24 Hr Vol on container & requisition Keep urine refrigerated during entire collection. No preservatives added to urine Collect serum for creatinine within 48 hours of the start, or 48 hours of the end, of urine collection. |
| Handling Instructions | Urine: Send a well-mixed, 50 mL aliquot of specimen Freeze aliquot if transport time >6 days. |
| Transport Requirements | Oahu: Serum/Plasma = Ambient Oahu: Urine = Refrigerated Airline: Serum/Plasma = Refrigerated Airline: Urine = Refrigerated |
| Specimen Stability | Ambient: Serum/Plasma = 2 Days Refrigerated: Serum/Plasma = 7 Days, Urine = 6 Days Frozen: Serum/Plasma = 3 Months, Urine = 6 Months Frozen samples should be thawed only once. |
| Rejection Criteria | Specimen older than stability limits, Hemolyzed serum/plasma specimen, Insufficient quantity, Preservatives in urine, Random urine collection, Urine collection is less than 22 hours, Urine collection is greater than 26 hours, Part of the urine collection is discarded, Received ambient urine |
| Avail. Stat | NO |
| Analytic Time | 1 Day |
| Methodology | Alkaline picrate-kinetic |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Creatinine Clearance, 24hr Urine | ALL | 80-140 | 80-140 | mL/min | |||||
| Serum Creatinine | ALL | 0.6-1.4 | 0.6-1.4 | mg/dL | |||||
| Urine Creatinine | ALL | mg/dL | See report. | ||||||
| Total Volume | ALL | mL | See report. | ||||||
| Total Time | ALL | minutes | See report. |