الفهرس 
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Abstract
Penile erection represents a neurovascular phenomenon resulting from arterial dilatation, sinusoidal relaxation and restriction of venous outflow. Arterial compliance and adequate flow are essential to achieve erection, and restriction of venous outflow is needed to maintain it. The aim of this work was to evaluate certain procedures used in the diagnosis of vasculogenic impotence including the arterial, cavernosal and venous side views in a trial to correlate and combine simplicity and sensitivity of these tests. Gravity cavernosometry represented the venous side evaluation, P B I and its modifications ( papaverine & pelvic steal tests ) were used to evaluate the arterial side. In addition to stretch test or penile extensibility to get knowledge about the corpora cavernosa and tunica albuginea. This study included forty two patients with persistent erectile failure selected according to certain criteria & eight control men with normal erectile function Thorough history was taken from every patient and control including sexual, medical , surgical, neurological urinary, & medications. The examination delt with general, neurological, vascular and local examination of the genitals