EFFICACY, SAFETY AND PATIENT SATISFACTION OUTCOMES OF THE AMS 700CX INFLATABLE PENILE PROSTHESIS: RESULTS OF A LONG-TERM MULTICENTER STUDY

Purpose

We performed a long-term multicenter study of the AMS 700CX ^‡ 3-piece inflatable penile prosthesis, focusing on longevity, morbidity and patient satisfaction in men implanted up to 134 months with a median followup of 47.7 months.

Materials and Methods

We performed a large scale retrospective multicenter study in 2 phases. Phase 1 was a medical record review of 372 men who underwent implantation with the AMS 700CX penile prosthesis from 1987 to 1996 by 7 frequent penile prosthesis implanters. Phase 2 included a structured telephone interview of 207 patients by a neutral observer.

Results

For the 372 men in phase 1 mean device mechanical reliability plus or minus standard deviation was 92.1% ± 3.3% after 3 and 86.2% ± 4.6% after 5 years. Patient age was 21 to 79 years (mean 57.6 ± 11.0) at implantation. The etiology of erectile dysfunction was vascular in 27.7% of the cases, Peyronie’s disease in 16.9%, diabetes mellitus in 12.9% and radical surgery in 11.6%. Of the men 55.6% received previous treatment for erectile dysfunction. Postoperative infection and device malfunction developed in 3.2% and 17.5% of the cases, respectively. Of the 207 men interviewed in phase 2, 86% still had an AMS 700CX penile prosthesis implanted, including 87.1% with erection suitable for coitus. Currently 79% of those with a device use it at least twice monthly and 88.2% would recommend an implant to a relative or friend.

Conclusions

The AMS 700CX penile implant produced suitable erection and excellent patient satisfaction at long-term followup in the majority of men. Implant reliability is excellent and postoperative morbidity is low.

Key Words:  penis , impotence , prostheses and implants , dysfunction, erectile , satisfaction, patient

• ‡ American Medical Systems, Minnetonka, Minnesota