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Aldosterone in Blood

How It Is Done

The health professional taking a sample of your blood will:

  • Wrap an elastic band around your upper arm to stop the flow of blood. This makes the veins below the band larger so it is easier to put a needle into the vein.
  • Clean the needle site with alcohol.
  • Put the needle into the vein. More than one needle stick may be needed.
  • Hook a tube to the needle to fill it with blood.
  • Remove the band from your arm when enough blood is collected.
  • Put a gauze pad or cotton ball over the needle site as the needle is removed.
  • Put pressure on the site and then put on a bandage.

How It Feels

The blood sample is taken from a vein in your arm. An elastic band is wrapped around your upper arm. It may feel tight. You may feel nothing at all from the needle, or you may feel a quick sting or pinch.

Risks

There is very little chance of a problem from having blood sample taken from a vein.

  • You may get a small bruise at the site. You can lower the chance of bruising by keeping pressure on the site for several minutes.
  • In rare cases, the vein may become swollen after the blood sample is taken. This problem is called phlebitis. A warm compress can be used several times a day to treat this.
  • Ongoing bleeding can be a problem for people with bleeding disorders. Aspirin, warfarin (Coumadin), and other blood-thinning medicines can make bleeding more likely. If you have bleeding or clotting problems, or if you take blood-thinning medicine, tell your doctor before your blood sample is taken.

Results

An aldosterone test measures the level of aldosterone (a hormone made by the adrenal glands) in the blood.

Aldosterone levels in a blood sample also change depending on whether you are standing up or lying down at the time the blood is taken. Blood aldosterone levels will be higher if you are standing or sitting up for 2 hours before the test.

Normal

The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.

Results are usually available in 2 to 5 days.

Aldosterone in blood1
 ChildrenTeensAdults
Standing or sitting down

5–80 nanograms per deciliter (ng/dL) or 0.14–2.22 nmol/L

4–48 ng/dL or 0.11–1.33 nmol/L

7–30 ng/dL or 0.19–0.83 nmol/L

Lying down

3–35 ng/dL or 0.08–0.97 nmol/L

2–22 ng/dL or 0.06–0.61 nmol/L

3–16 ng/dL or 0.08–0.44 nmol/L

WebMD Medical Reference from Healthwise

Last Updated: June 20, 2012
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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