Calcium, Random Urine without Creatinine
Test Code
Clinical Significance
Calcium, Random Urine without Creatinine -
This quantitative test, performed with a random urine specimen, may help screen for hypercalciuria, one of the established risk factors for kidney stone formation [1-3]. This test may also help assess metabolic disorders of calcium metabolism, such as hyperparathyroidism, bone disease, and idiopathic hypercalciuria. In general, 24-hour urine specimens are preferred to random urine specimens when measuring calcium for diagnostic evaluation of hypercalciuria [1].
Calcium is essential for bone formation and nerve, muscle, and heart functions. Calcium metabolism is jointly regulated by parathyroid ...
Test Resources
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Test Details
Methodology
Reference Range(s)
Alternative Name(s)
Preferred Specimen(s)
10 mL random urine
Alternative Specimen(s)
Unpreserved urine • Urinalysis transport tube (yellow-top, blue fill line, preservative tube)
Minimum Volume
2 mL
Collection Instructions
Collect 10 mL random urine in a plastic screw-capped container and adjust pH to <2 with 6N HCl. Aliquot urine specimens and send at room temperature to the laboratory.
or
It is acceptable to add preservative after collection if urine is refrigerated during collection. Record total volume and collection time on specimen container and requisition.
Transport Container
Plastic urine container
Transport Temperature
Preserved urine: Room temperature
Unpreserved urine: Refrigerated (cold packs)
Specimen Stability
- Room temperature: 5 days
Refrigerated: 5 weeks
Frozen: 6 months
Setup Schedule
or
It is acceptable to add preservative after collection if urine is refrigerated during collection. Record total volume and collection time on specimen container and requisition.
Unpreserved urine: Refrigerated (cold packs)
Refrigerated: 5 weeks
Frozen: 6 months