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Calcium/Creatinine Ratio, Urine Timed
MessagePerforming Lab: Central Lab, Regions
Test Code
3587
Alias/See Also
Sunquest: CACRT
CPT Codes
82340, 82570
Includes
Total Volume (TVOL3); Hours of Collection (HRCL1); Urine Calcium (URCA); Urine Creatinine (URCRE); Calcium/Creatinine Ratio (CACRR)
Preferred Specimen
1.0 mL of a timed urine collection
Minimum Volume
0.1 mL
Instructions
Preserve timed urine collection with refrigeration.
Consult Urine Collection/Processing Information for acceptable preservatives
Consult Urine Collection/Processing Information for acceptable preservatives
Transport Temperature
Refrigerated
Specimen Stability
Refrigerated: 5 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Unacceptable preservatives
Methodology
Calcium: Colorimetric
Creatinine: Two-point rate
Setup Schedule
Hospital: Daily
Clinics: Monday - Friday
Clinics: Monday - Friday
Report Available
Same day.
Reference Range
No reference range has been established
Clinical Significance
Used for identification of abnormal physiologic states causing excess or suppressed excretion of calcium, such as hyper parathyroidism, vitamin D abnormality, disease that destroy bone, prostate cancer, and drug treatment, such as thiazide therapy.
