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Calcium in Urine
Overview & Description
This test measures the amount of calcium in urine.
Calcium is needed for many cellular functions. It is especially important for bone structure and muscle activity. The amount of calcium in urine can help find and monitor disorders involving calcium regulation.
Who is a candidate for the test?
This test is ordered to help diagnose diseases of the kidneys, parathyroid glands, or bones.
How is the test performed?
This test is performed on a urine sample collected over 24 hours.
In general, this schedule is followed: On the first day, the person should urinate as usual after getting up. This sample is not saved. Then all urine produced for the next 24 hours is collected in a special container. The next morning's urine is added to the day's collection. The sample must be refrigerated until it is delivered to a healthcare provider.
Preparation & Expectations
What is involved in preparation for the test?
A healthcare provider provides specific instructions. Generally, no special preparation is required.
Results and Values
What do the test results mean?
Normal levels of calcium in urine range from 100 to 300 milligrams per day for persons on a normal diet. For those on a low-calcium diet, from 50 to 150 milligrams per day is normal.
Abnormally high levels of calcium in the urine may indicate:
Abnormally low levels of calcium may indicate:
Attribution
Author:David T. Moran, MD
Date Written:
Editor:Evans, Gwen, BA
Edit Date:03/18/00
Reviewer:Adam Brochert, MD
Date Reviewed:09/19/01