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Test Name: Calcium, 24Hr Urine
Test Code: 003269
Other Names: N/A
Test Includes: Calcium, Urine, Calcium, Urine 24hr
Specimen Requirements: Urine (24-hour), 25 mL aliquot
Container: Preferred container; plastic urine container with at least 10 mL 6N HCl (hydrocloric acid). Specimens submitted without preservatives should be acidified after receipt to a pH of <2.0 to dissolve calcium salts.
Collection Instructions: Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Screw the lid on securely. Transport the specimen promptly to the laboratory. Container MUST be labeled with patient's full name, room number, date and time collection started, and date and time collection finished. pH must be <2.
Stability: Maintain specimen at room temperature.
Rejection Criteria / Special Instructions: The test request form MUST state date and time collection started and date and time collection finished. State total volume.
Methodology: Colorimetric