| Ordering Code | 6642 |
|---|---|
| Test Name | Urine Calcium/Urine Creat Ratio |
| Alias | Urine Calcium/Urine Creatinine Ratio |
| Preferred Specimen | Urine, Random |
| Preferred Container | Clean Container |
| Other Specimen/Container | 24 Hr Urine in Clean 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 | Needs preservative Urine Calcium: Acidify urine to pH <2.0 with 6N HCL after collection Urine Creatinine does not need preservative. |
| Transport Requirements | Oahu: Ambient Airline: Ambient |
| Specimen Stability | Ambient: 2 Days Refrigerated: 6 Days |
| Rejection Criteria | Specimen older than stability limits |
| Avail. Stat | NO |
| Analytic Time | 1 Day |
| Methodology | Arsenazo III / Modified Jaffe, Alkaline picrate-Kinetic |
Reference range(s)
The reference ranges listed below are valid on this date of August 15, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Creatinine, Urine | ALL | mg/dL | See report. | ||||||
| Calcium, Urine | ALL | mg/dL | See report. | ||||||
| Calcium/Creatinine Ratio | ALL | See report. |