URINE FOR CALCIUM CREATININE RATIO TEST

Calcium is an electrolyte that plays an important role in many physiological processes throughout the body. In normal health, almost all of the filtered calcium is reabsorbed in the post-glomerular nephron. Urinary calcium excretion exhibits diurnal variation, largely reflecting dietary intake. As such, a 24-hour collection is the best way to assess urine calcium status. If testing is to be carried out on a random urine specimen, the measured calcium should be corrected for urine concentration and reported as the calcium/creatinine ratio.