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What is adrenal venous sampling?

Patients over 40 years of age and those without evidence of an adrenal tumor on imaging should also have a special test called adrenal venous sampling. This procedure is performed in the operating room and involves taking blood samples to measure the aldosterone levels directly from the adrenal glands by placing a catheter in the left and right adrenal veins. High hormone levels from one gland but not the other suggests unilateral disease. If the blood levels are similar on both sides, then the patient likely has bilateral disease. When performed by an experienced physician, adrenal venous sampling is very accurate at determining if the patient has unilateral or bilateral disease. Patients can usually go home the same day of the procedure.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.