Definition A test that measures the amount of calcium in urine.
All cells require calcium for numerous functions.
Calcium is especially important in the structure of bones and in neuromuscular activity. The health care provider will instruct you, if necessary, to discontinue drugs that may interfere with the test. On day 1, urinate into the toilet upon arising in the morning. On day 2, urinate into the container in the morning upon arising. Cap the container.