Health Library

24-hour urinary aldosterone excretion test
     
Print-Friendly
Bookmarks

24-hour urinary aldosterone excretion test

Aldosterone - urine; Addison disease - urine aldosterone; Cirrhosis - serum aldosterone

 

The 24-hour urinary aldosterone excretion test measures the amount of aldosterone removed in the urine in a day.

Aldosterone can also be measured with a blood test.

How the Test is Performed

 

A 24-hour urine sample is needed. You will need to collect your urine over 24 hours. Your health care provider will tell you how to do this. Follow instructions exactly.

 

How to Prepare for the Test

 

Your provider may ask you to stop taking certain medicines a few days before the test so that they don't affect the test results. Be sure to tell your provider about all the medicines you take. These include:

  • High blood pressure medicines
  • Heart medicines
  • Nonsteroidal anti-inflammatory drugs (NSAIDs)
  • Antacid and ulcer medicines
  • Water pills (diuretics)

Do not stop taking any medicine before talking to your doctor.

Be aware that other factors can affect aldosterone measurements, including:

  • Pregnancy
  • High- or low-sodium diet
  • Eating large amounts of black licorice
  • Strenuous exercise
  • Stress

Do not drink coffee, tea, or cola during the day the urine is collected. Your provider will likely recommend that you eat no more than 3 grams of salt (sodium) per day for at least 2 weeks before the test.

 

How the Test will Feel

 

The test involves only normal urination. There is no discomfort.

 

Why the Test is Performed

 

The test is done to see how much aldosterone is released into your urine. Aldosterone is a hormone released by the adrenal gland that helps the kidney control salt, water, and potassium balance.

 

Normal Results

 

Results depend on:

  • How much sodium is in your diet
  • Whether your kidneys work properly
  • The condition being diagnosed

Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your doctor about the meaning of your specific test results.

 

What Abnormal Results Mean

 

A higher than normal level of aldosterone may be due to:

  • Abuse of diuretics
  • Liver cirrhosis
  • Adrenal gland problems, including adrenal tumors that produce aldosterone
  • Heart failure
  • Laxative abuse

Lower than normal levels may indicate Addison disease, a disorder in which the adrenal glands do not produce enough hormones.

 

Risks

 

There are no risks with this test.

 

 

References

Chernecky CC, Berger BJ. Aldosterone - serum and urine. In: Chernecky CC, Berger BJ, eds. Laboratory Tests and Diagnostic Procedures. 6th ed. St Louis, MO: Elsevier Saunders; 2013:114-116.

Gruber HA, Farag AF. Evaluation of endocrine function. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 23rd ed. St Louis, MO: Elsevier; 2017:chap 24.

BACK TO TOPText only

 

        A Closer Look

         

          Talking to your MD

           

            Self Care

             

              Tests for 24-hour urinary aldosterone excretion test

               
               

              Review Date: 8/25/2017

              Reviewed By: Brent Wisse, MD, Associate Professor of Medicine, Division of Metabolism, Endocrinology & Nutrition, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

              The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
              adam.com