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Calcium/Creatinine Ratio, Urine

Mnemonic

U CA/CR R

Synonym

Urine Calcium Random - Calcium, Urine, Random

Includes

Urine Calcium, Urine Creatinine, Urine Calcium/Creatinine Ratio

Specimen Collection Requirements

Collect

Urine, one sterile container without preservatives. First morning void is preferred.

Supply Item Number - 135327

Also acceptable: Timed urine collection without preservatives, refrigerate during collection. 

Handling

Legacy Laboratories will adjust the pH to 2 with 6N HCl before testing for urine calcium occurs.

Preferred Volume

5.0 mL urine

Minimum Volume

2.5 mL urine

Transport

Refrigerated (2-8°C)

Rejection Criteria

Samples collected using cotton balls.

Stability

Room Temperature (18-26°C): 48 hours; Refrigerated (2-8°C): 6 days; Frozen (≤-20°C): 28 days

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Colorimetry

Reference Values

Reference Values

Calcium/Creatinine Ratio: 0-199 mg/gCR

CPT Codes

Urine Calcium: 82340, Urine Creatinine: 82570

Last Updated: Saturday, January 30, 2021 12:56:30 AM


Client Services: 503-413-1234