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Alternative names
Aldosterone - urineDefinition Return to top
24-hour urinary aldosterone excretion rate test measures the amount of aldosterone eliminated in the urine in a day (see the blood aldosterone test).How the test is performed Return to top
A 24-hour urine sample is needed. The health care provider will instruct you, if necessary, to discontinue drugs that may interfere with the test.FOR INFANTS
Thoroughly wash the area around the urethra. Open a urine collection bag (a plastic bag with an adhesive paper on one end), and place it on the infant. For males, the entire penis can be placed in the bag and the adhesive attached to the skin. For females, the bag is placed over the labia. Diaper as usual over the secured bag.
This procedure may take a couple of attempts -- lively infants can displace the bag, causing the specimen to be absorbed by the diaper. The infant should be checked frequently and the bag changed after the infant has urinated into the bag. The urine is drained into the container for transport to the laboratory.
Deliver it to the laboratory or your health care provider as soon as possible upon completion. The lab analyzes the sample for the amount of aldosterone.
How to prepare for the test Return to top
No special preparation is necessary for this test, but if the collection is being taken from an infant, a couple of extra collection bags may be necessary.How the test will feel Return to top
The test involves only normal urination, and there is no discomfort.Why the test is performed Return to top
The test evaluates the excretion of aldosterone in the urine. Aldosterone is a hormone secreted by the adrenal gland which acts on the kidney to regulate salt and potassium balance.Normal Values Return to top
Normal values range from 6 to 25 mcg/24 hours. (This depends on the amount of sodium excreted by the body. The greater the amount of sodium, the lower the level of aldosterone.) Normal value ranges may vary slightly among different laboratories.What abnormal results mean Return to top
Greater than normal levels of aldosterone may indicate:What the risks are Return to top
There are no risks.Special considerations Return to top
The results may be questionable, if the renal function is not normal.
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Page last updated: 28 October 2004 |