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Test Code UCA24H Calcium, Urine, Timed LAB814

Important Note

Preservative required: 10 mL 6N HCl.

Bring urine collection container to laboratory prior to starting the collection for the addition of the necessary preservative.

Test Method

Ion-Specific Electrode; Beckman DXC600

Specimen Requirement

0.5 mL urine is required.

Additional Specimen Collection Information

Collect a timed urine specimen, 24 hour preferred. 10 mL of
6N HCl is required as a preservative. Keep specimen chilled
during the collection period. Submit entire specimen for analysis.
Store the urine specimen refrigerated and transport to the lab
within 48 hours.

Reference Values

Males: 25-300 mg/24 hours

Females: 20-275 mg/24 hours

Performance

Testing is performed Monday through Sunday.

Typically assayed within 2 hours after the specimen
arrives at the testing site.

Useful For

Identification of abnormal physiologic states causing excess or
suppressed excretion of calcium, such as hyperparathyroidism,
vitamin D abnormality, diseases that destroy bone, prostate cancer,
and drug treatment, such as thiazide therapy.

LOINC Code Information

18488-7 Calcium [Mass/Volume] In 24 Hour Urine

CPT Code Information

82340 Chemistry: Calcium, urine quantitative, timed specimen