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To indicate sufficiency of dietary calcium intake and rate of absorption. Urine calcium levels are also used to assess bone resorption, kidney stones, and renal loss of calcium.
There are no fluid, activity, or medication restrictions unless by medical direction. Usually, a 24-hr urine collection is ordered. Instruct the patient to follow a normal calcium diet for at least 4 days before test. Protocols may vary among facilities. As appropriate, provide the required urine collection container and specimen collection instructions.
|Age||Conventional Units*||SI Units (Conventional Units × 0.025)*|
|Infant and child||Up to 6 mg/kg per 24 hr||Up to 0.15 mmol/kg per 24 hr|
|Adult on average diet||100–300 mg/24 hr||2.5–7.5 mmol/24 hr|
|*Values depend on diet.|
Critical Findings and Potential Interventions
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Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Calcium, Urine." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425314/4/Calcium_Urine.
Bladh ML, Van Leeuwen AM. Calcium, Urine. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425314/4/Calcium_Urine. Accessed October 21, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Calcium, Urine. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425314/4/Calcium_Urine
Bladh ML, Van Leeuwen AM. Calcium, Urine [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 October 21]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425314/4/Calcium_Urine.
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