Mercy Hospital & Health Services Contact Us
MyChart
About Mercy
Join Our Team
set font size large set font size medium set font size small
email this page print this page
Health Illustrated Encyclopedia Banner
Health Illustrated Encyclopedia

Disclaimer:
Our Health Information Database is provided by A.D.A.M. the leading provider of electronic and printed information for professionals and consumers in healthcare and industry. It provides authoritative, reliable content written and reviewed by an editorial board who represent a variety of specialty areas. This board reviews and evaluates all healthcare information to ensure it is accurate, reliable, and can be used with complete confidence. And now you have access to the same authoritative, trusted clinical information relied upon by health professionals around the world.
Aldosterone

Definition

An aldosterone test measures the amount of the hormone aldosterone in blood.

Alternative Names

How the test is performed

Blood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.

Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm. Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.

In infants or young children, a sharp tool called a lancet may be used to puncture the skin and make it bleed. The blood collects into a small glass tube called a pipette, or onto a slide or test strip. A bandage may be placed over the area if there is any bleeding.

How to prepare for the test

Your doctor may instruct you about your salt intake before the test.

How the test will feel

When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.

Why the test is performed

This test is performed to investigate:

Aldosterone is a hormone released by the adrenal glands. It helps the body regulate blood pressure.

Aldosterone increases the reabsorption of sodium and water and the release of potassium in the kidneys. This action raises blood pressure.

Often, blood aldosterone levels are combined with other tests to diagnose over- or under-production of the hormone. These tests may include:

  • ACTH infusion test
  • Captopril test
  • Intravenous saline infusion test
  • Plasma renin activity

Normal Values

Lying down: 2 to 16 ng/dL

Upright: 5 to 41 ng/dL

Note: ng/dL = nanograms per deciliter

Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

What abnormal results mean

Higher than normal levels of aldosterone may indicate:

Lower than normal levels of aldosterone may indicate:

What the risks are

Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.

Other risks associated with having blood drawn are slight but may include:

  • Excessive bleeding
  • Fainting or feeling light-headed
  • Hematoma (blood accumulating under the skin)
  • Infection (a slight risk any time the skin is broken)

Special considerations

Factors that can affect aldosterone measurements include:

  • Acute stress
  • Dietary salt intake
  • Strenuous exercise

Many medications can influence aldosterone levels, including:

  • ACE inhibitors
  • Calcium channel blockers
  • Diuretics
  • Heparin
  • Lithium
  • Nonsteroidal anti-inflammatory drugs (NSAIDs)
  • Propranolol

References

Nieman LK. Adrenal cortex. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, PA: Saunders Elsevier; 2007: chap 245.

View Spanish Version

Encyclopedia Home
Drug Note Home
Health Information Home

Images

Care Points
    Read More

    Review Date: 7/25/2009

    Review By: Robert Cooper, MD, Endocrinology Specialist and Chief of Medicine, Holyoke Medical Center, Assistant Professor of Medicine, Tufts University School of Medicine, Boston, MA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

    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. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2010 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

    www.adam.com
    www.mercyweb.org
    follow us online
    facebook youtube


    Contact us
    Home  |  Sitemap

    Disclaimer & Terms of Use  |  Privacy Statement  |  Notice of Privacy Practices
    Copyright ©2013 Mercy. Last modified 2/16/2011