Test directory: Calcium, 24 Hr Urine

Ordering Code248
Test NameCalcium, 24 Hr Urine
Alias24 Hr Urine Calcium
24 Hr Urine Ca++
Preferred SpecimenUrine, 24 Hour
Preferred Container24 Hour Urine Container
Optimum Volume0.5 mL
Collection InstructionsKeep 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 InstructionsSend 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 RequirementsOahu: Refrigerated
Airline: Refrigerated
Specimen StabilityAmbient: 2 Days
Refrigerated: 4 Days
Frozen: 3 Weeks
Send frozen if transport time >4 days.
Rejection CriteriaGrossly hemolyzed, Insufficient quantity, No preservatives, pH >7.5, Specimen older than stability limits
Avail. StatNO
Analytic Time1 Day
MethodologyColorimetric, NM-BAPTA

Reference range(s)

ComponentAgeMale NormMale Critical LowMale Critical HighFemale NormFemale Critical HighFemale Critical LowUnitsAdd'l info
24-Hr Urine CalciumALL100-300100-300mg/24hr
Total VolumeALLmLSee report.
Total TimeALLminutesSee report.
Calcium, UrineALLmg/dLSee report.