Abstract
Twenty-four patients undergoing aortic surgery for aneurysmal or occlusive aortic disease were studied prospectively to assess the effect on bladder function. Thirteen patients completed the study with post-operative follow-up at 3 months. Aortic surgery was found to be unlikely to cause damage to the parasympathetic nerves. There was no change in the detrusor stability/instability status in five of seven patients undergoing surgery for occlusive disease. Fifty-seven per cent of patients undergoing surgery for aneurysmal disease and 83% of those undergoing surgery for occlusive disease noted improved urinary flow with decreased maximal urethral pressure following surgery, suggesting damage to the sympathetic nerve supply to the lower urinary tract. The improvement in urinary flow did not relate either to the assessed extent of damage to the sympathetic nerves at operation or to the type of operation or vascular anastomosis. It is concluded that aortic surgery damages the sympathetic rather than the parasympathetic nerves and that any effect on bladder function is of no serious significance.
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