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Calcium/Creatinine Ratio, Urine
MessagePerforming Lab: Central Lab, Regions
Test Code
0937
Alias/See Also
Sunquest: UCACR
CPT Codes
82310, 82570
Includes
Calcium (urine); Creatinine (Urine); Calcium/Creatinine ratio
Preferred Specimen
0.2 mL of a random urine collection
Minimum Volume
0.1 mL
Instructions
Preserve urine by refrigeration collected in urine transport tube.
HP: Send to lab in bar-codes urine transport tube.
HP: Send to lab in bar-codes urine transport tube.
Transport Container
HP: Send to lab in bar-codes urine transport tube
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature: 3 days
Refrigerated: 5-7 days
Refrigerated: 5-7 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Unacceptable preservatives: Boric Acid with sodium formate as preservative, 10% thymol as preservative
Methodology
Calcium: Colorimetric -Arsenazo III
Creatinine: Enzymatic - Two Point Rate
Setup Schedule
Hospital: Daily
Clinics: Monday - Friday
Clinics: Monday - Friday
Report Available
Same Day
Reference Range
<0.2
Clinical Significance
Calcium/creatinine ratio of random urine specimens may be used to detect hypercalciuria in patients suspected of having metabolic bone disease or other abnormalities of calcium metabolism.
