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Erection self-test

Erection self-test

Overview

The nocturnal penile tumescence (NPT) stamp test is a test that confirms the inability to achieve and maintain an erection.

Update Date 9/19/2011

Updated by: Louis S. Liou, MD, PhD, Chief of Urology, Cambridge Health Alliance, Visiting Assistant Professor of Surgery, Harvard Medical School. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.