1988 Volume 79 Issue 12 Pages 1909-1918
Using canine electroerection models, intracorporeal blood flow changes induced by ligation of arteries such as the internal pudendal arteries, internal iliac arteries and abdominal aorta were investigated. 35 dogs (weighing 10.0-23.0kg) were used in this study. Pelvic nerve electrostimulation (4V, 4msec, 40Hz) was applied and electroerection was achieved in the dogs. During the electroerection, the arteries were ligated in three defferent orders. The depolarizing current in the right and left corpora cavernosa was measured by the open tip type oxygen electrode polarographic method to investigate the intracorporeal blood flow.
By pelvic nerve stimulation, the intracorporeal blood flow increased and the increased blood flow maintained a plateau during the stimulation. By ligation of the right internal pudendal artery, both right and left intracorporeal blood flow decreased. After each ligation of the internal pudendal artery and the internal iliac artery, intracorporeal blood flow was decreased and the decreasing ratios were 2 and 1, respectively. By the ligation of the right internal iliac artery, about 20% of right and left intracorporeal blood flow decreased. By the ligation of the right and left internal iliac arteries, about 50% of right and left intracorporeal blood flow decreased. By the ligation of the right internal pudendal artery, about 25% of right and left intracorporeal blood flow decreased. By the ligation of the right and left internal pudendal arteries, about 50% of right and left intracorporeal blood flow decreased.
These findings suggest that, in addition to the main blood flow supply to the corpora cavernosa by the internal pudendal arteries, many collaterals exist, furnishing the blood flow and playing an important role in penile erection.