The evaluation of nocturnal erection, represents an essential test in uninvasive diagnostics of erection insufficiency. Most authors agree in considering the Nocturnal Penile Tumescence Test as the “first step” in evaluating impotence, especially if it is performed at the patient's domicile. The Authors have developed a ruler, enabling suitable information to be obtained as to the best erection event, which is selected and enlarged after 1 hour.
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IaconoF., BarraS., LottiT.: Evaluation of penile deep arteries in psichogenic impotence by means of duplex ultrasonography. J. Urol., in press.
