Cylinder reliability of inflatable penile prosthesis. Experience with distensible and nondistensible cylinders in 325 patients.

In 325 patients inflatable penile prostheses were implanted from 1981 to 1987. All patients were diagnosed as organically impotent and subsequently the AMS inflatable penile prosthesis, using the PPS, PPT, or PND cylinders, was implanted. The scrotal approach, utilizing a transverse incision, was used in all 325 cases. The three-year cylinder survival rate was 72 percent for the PPS, 86 percent for the PPT, and 97 percent for the PND. Survival for the PPT and PND cylinders showed a statistically significant improvement when compared with the PPS cylinder. It was concluded that overall success had improved due to modification of the surgical technique and refinements in the components of the prosthesis, particularly the cylinders.