Impotence/Erectile Dysfunction (cont.)
Medical Author:
Stephen W Leslie, MD, FACS
Coauthor:
Stanley A Brosman, MD
Medical Editor:
Joseph A Salomone III, MD
Medical Editor:
Francisco Talavera, PharmD, PhD
Medical Editor:
Richard Harrigan, MD
IN THIS ARTICLE
Multimedia: Part 1
Media type: Illustration Media file 2: A number of devices have been developed to determine if an erection occurs during sleep. This snap gauge is fastened around the penis but opens when an erection occurs. 
Media type: Illustration Media file 3: This penile tumescence monitor is placed at the base and near the corona of the penis. It is connected to a monitor that records a continuous graph depicting the force and duration of erections that occur during sleep. The monitor is strapped to the leg. The nocturnal penile tumescence (NPT) test is conducted on several nights to obtain an accurate indication of erections that normally occur during the alpha phase of sleep. 
Media type: Illustration Media file 4: The presence of normal skin sensation adequate to produce an erection is measured with this device. 
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Erectile Dysfunction FAQs
Erectile dysfunction (or ED), also called male impotence, describes a man's inability to achieve and maintain an erection of his penis sufficient for mutually s...learn more >>
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