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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.

Handling

Remove particulates by centrifugation prior to analysis. 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

Ambient (18-26°C): 48 hours; Refrigerated (2-8°C): 6 days; Frozen (≤-20°C): 1 month

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Colorimetry

Reference Values

Reference Values

Calcium/Creatinine Ratio: 0.00 - 0.14 mg/mgCR (0 - 140 mg/gCR)

CPT Codes

82340, 82570

Last Updated: Monday, June 19, 2017 03:35:38 PM


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