Nocturnal penile tumescence (NPT) stamp test; Nighttime penile tape test
What the risks are
There are no risks.
This test is rarely done anymore. It test is not very accurate and there are better tests available to monitor blood flow. This test does not indicate many important factors of sexual dysfunction, such as quality, duration, or number of erections during the night.
Review Date: 09/22/2009
Reviewed By: Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; Louis S. Liou, MD, PhD, Assistant Professor of Urology, Department of Surgery, Boston University School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.