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URL of this page: //medlineplus.gov/ency/imagepages/8894.htm
Erection self-test
Overview
The nocturnal penile tumescence (NPT) stamp test is a test that confirms the inability to achieve and maintain an erection.
Review Date 10/13/2023
Updated by: Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
