Specimen Requirements

Title

CALCIUM, 24 HOUR URINE

Specimen Requirement

20 mL of 24 hour urine in sterile screw-cap container.

Indicate 24hr volume on container and lab order.

Methodology

Stability

Refrigerated 7 days

Reference Range

By Report*

Turnaround

24 hours

Clinical Use

Urinary calcium excretion is increased in hyperparathyroidism, vitamin D intoxication, diseases that destroy bone (multiple myeloma, metastasis from prostate cancer) and following calcium supplementation. Thiazide drugs may reduce calcium excretion

Test Code

24CAM