Balloon dilatation of the external urethral sphincter: a case study.

A new and simple endoscopic treatment procedure of external urethral sphincters is described. The external urethral sphincter was dilated with a balloon catheter 25mm in diameter in a multiple sclerosis patient; the sphincter spasticity made intermittent catheterization impossible. Post dilatation, the resistance to catheterization completely disappeared and the urethral pressure profile showed a dramatic fall in sphincteric pressure. This fall in sphincteric pressure has remained at a normal post dilatation level at the time of submission of this article (7 months).