The intracavernous pressure to produce a passive erection was recorded in a 40-year-old man suffering from impotence. The patient had passive erection with a flow of 160 ml/min. The flow needed to maintain erection was 40 ml/min. The pressure in the flaccid state was 15 mmHg, and 151 mmHg in the state of erection. In the state of erection, the perfused liquid was demonstrated to escape through the deep dorsal vein of the penis. No other causes of impotence were revealed, and we diagnosed his erectile failure to be due to venous leakage. We performed ligation of this vein. After the operation, nocternal penile tumescence was improved. His potency recovered completely, and no complication was noted.
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