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A urine calcium test measures 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. It’s used for numerous functions, such as building and repairing bones and teeth. Calcium contributes to the functionality of your nerves, muscles, and heart. It also helps blood to clot.
Most calcium is stored in your bones. The remainder can be found in your blood. When calcium levels in your blood get too low, your 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 urine or stool.
The level of calcium present in your body depends on the following factors:
People who have high or low levels of calcium usually don’t show any symptoms. Calcium levels often need to be extremely high or extremely low to prompt physical symptoms.
Performing a urine calcium test can help your doctor evaluate:
A blood calcium test is usually accurate in detecting certain conditions such as specific bone diseases, pancreatitis, and hyperparathyroidism.
Your doctor may tell you to stop taking any medications that could affect the test results before the test. They may also 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 to collect the urine.
A urine calcium test measures the amount of calcium in the urine you produce in a 24-hour period. The test lasts from the morning of one day to the morning of the next.
These steps are usually followed for the urine test:
No risks are associated with the urine calcium test.
Abnormally high calcium levels in the urine could be a sign of several syndromes or conditions, such as:
Calcium levels in the urine that are abnormally low could point to:
Call your doctor to set up a consultation if you’re taking diuretics or think you’re experiencing one of the conditions listed above. Your doctor can help you work through any symptoms and decide if you need a urine calcium test.
Written by: Karla Blocka
Medically reviewed on: Dec 15, 2015: Mark R Laflamme MD
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