Serum/plasma mass concentration of aldosterone

Why Is This Test Done?

Your doctor may order this test to check for conditions like primary aldosteroneism (also called Conn’s syndrome), adrenal gland tumors, or other hormonal imbalances that affect blood pressure or kidney function. It may also be used to monitor treatment for conditions such as hypertension or adrenal disorders.

What Does a High or Low Level Mean?

High aldosterone levels may indicate conditions like primary hyperaldosteronism, which can cause high blood pressure, low potassium levels, or kidney problems. Low levels might suggest adrenal insufficiency or other hormonal issues that need further evaluation.

Sample Collection and Preparation

This test requires a blood sample drawn from a vein in your arm. The blood is collected in a special tube and sent to a lab for analysis. Plasma or serum is used, depending on the lab’s standard procedure.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to avoid certain medications (like some blood pressure drugs) or foods (like salt) for a short time before testing, depending on your doctor’s instructions.