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A urine calcium test is done to measure how much calcium is passed out of the body through urine. The test is also known as the urinary Ca+2 test.
Calcium is the most common mineral in the body. All cells throughout the body use calcium for various functions. The body uses calcium to build and repair bones and teeth. Calcium also helps nerves, the heart, and muscles function properly, and helps blood to clot.
Most of the calcium in the body is stored in bones. The remainder is found in the blood.
When calcium levels in the blood get too low, the bones release enough calcium to bring the level in the blood back to normal. When calcium levels get too high, the surplus of calcium is either stored in bones or expelled from the body through your urine or stool.
The amount of calcium that’s in your body depends on the following factors:
Most often, people who have high or low levels of calcium do not show any symptoms. Calcium levels need to be extremely high or extremely low to show symptoms.
Reasons to perform a urine calcium test include:
In preparation for the urinary calcium test, your doctor may instruct you to stop taking medications that could affect the test results. In addition, your doctor may ask you to follow a diet with a specific level of calcium for several days leading up to the test.
If the urine sample is being collected from your infant, your child’s doctor will provide special collection bags with instructions on how the urine should be collected.
A urine calcium test measures the amount of calcium in a sample taken from all the urine that is produced in a 24–hour period. The test lasts from the morning of one day to the morning of the next day.
These steps are usually followed for the urine test:
There are no risks associated with the urine calcium test.
The amount of calcium in the urine of someone eating a normal diet is 100 to 300 mg/day*. A diet that is low in calcium results in 50 to 150 mg/day of calcium in the urine.
*mg/day = milligrams per day
If calcium levels in the urine are abnormally high, it may be a sign of:
If calcium levels in the urine are abnormally low, it may be a sign of:
Written by: Karla Blockaon: Jun 26, 2017
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