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Many types of vacuum constriction devices (VCDs) are used for the treatment of impotence, but the VCDs made in the USA are too large for Japanese males, and air leakage occurs. Therefore, we examined the erectile response of 47 impotent men to a vacuum constriction device that is made in Japan and can be applied suitably for Japanese men, and compared the response to intracavernous injection of prostaglandin E1 (PGE1). When the 47 cases were divided into two groups by nocturnal penile tumescence, twenty of the impotent men were regarded to have fewer organic factor (group A) while 27 were regarded to have more organic factor (group B). All (100%) of the 20 cases of group A achieved a complete erection with the VCD, but only 11 (55%) of them achieved a complete erection with PGE1. Twenty-three (85%) of the 27 cases of group B achieved a complete erection with the VCD, but only nine (33%) achieved a complete erection with PGE1. Two of the four patients who did not achieve a complete erection with the VCD stopped pumping the VCD because of penile pain, and the other two patients had a penile-brachial pressure index (PBPI) of under 0.65. It was suggested that patients with no severe vascular disease can show a good erectile response with the VCD.

A STUDY ON THE ERECTILE RESPONSE WITH THE VACUUM CONSTRICTION DEVICE COMPARED WITH INTRACAVERNOUS INJECTION OF A VASOACTIVE DRUG