|Test Name||Calcium, 24 Hr Urine|
|Alias||24 Hr Urine Calcium|
24 Hr Urine Ca++
|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|
6N HCl added as a preservative
Record entire 24 Hr volume and collection time on container & requisition.
|Handling Instructions||Send a well-mixed, 50 mL aliquot of specimen. Adjust to pH <2.0 with 6N HCl and mix well prior to aliquoting for testing.|
|Transport Requirements||Oahu: Refrigerated|
|Specimen Stability||Ambient: 2 Days|
Refrigerated: 4 Days
Frozen: 3 Weeks
Send frozen if transport time >4 days.
|Rejection Criteria||Grossly hemolyzed, Insufficient quantity, No preservatives, pH >7.5, Specimen older than stability limits|
|Analytic Time||1 Day|
The reference ranges listed below are valid on this date of May 23, 2022.
|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 Calcium||ALL||100-300||100-300||mg/24hr|
|Total Volume||ALL||mL||See report.|
|Total Time||ALL||minutes||See report.|
|Calcium, Urine||ALL||mg/dL||See report.|