Abstract
Complications due to venous injury are occasionally encountered when bridging veins are divided in an anterior interhemispheric approach for acute aneurysmal surgery. We analyzed the relations between the venous drainage pattern into the superior sagittal sinus and postoperative complications derived from venous injury. The results were as follows: 1) There were no such complications in cases without bridging veins draining in the area of approach 2) Great risks were observed when dividing bridging veins which contained more than three major cortical veins on the lateral surface of the frontal lobe. 3) A bridging vein which drained from less than two major cortical veins could be sacrificed without causing any clinical problems. We conclude that angiographical evaluation of the distribution pattern of the bridging veins is useful for preventing complications due to venous injury in an anterior interhemispheric approach.
