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Calcium urine
Test CodeCALCIUM, URINE
Alias/See Also
Chemistry
Preferred Specimen
Random urine
Minimum Volume
2 mL
Transport Temperature
Refrigerate
Specimen Stability
Acidify urine to to pH <2
Room temperature: 2 days
Refrigerated (2-8°C): 4 days
Frozen (-20°C or colder): 3 weeks
Room temperature: 2 days
Refrigerated (2-8°C): 4 days
Frozen (-20°C or colder): 3 weeks
Methodology
Arsenazo
Setup Schedule
Daily
Report Available
TAT 1 day
Reference Range
5 - 15 mg/dL
Clinical Significance
Urinary calcium reflects dietary intake, rate of calcium absorption by the intestine and bone resorption. Urinary calcium is used primarily to evaluate parathyroid function and the effects of vitamin D. A significant number of patients with primary hyperparathyroidism will have elevated urinary calcium. However, there are other clinical entities that may be associated with increased urine calcium: Sarcoidosis, Paget's disease of bone, vitamin D intoxication, hyperthyroidism and glucocorticoid excess. Decreased urine calcium is seen with thiazide diuretics, vitamin D deficiency and familial hypocalciuric hypercalcemia.
Performing Laboratory
Test performed in these BACL Chemistry Labs
Contact: Jonathan Dryjowicz-Burek, West Roxbury 857-203-5973
Alternate contact Joseph A. Manzone Jamaica Plain 857-364-5092
Last Updated: May 17, 2022
