Reliability of AMS M700 inflatable penile prosthesis.

Two hundred ninety patients have been followed up for at least one year or longer after implantation of the AMS M700 inflatable penile prosthesis. One hundred twenty-seven males have been followed up for two years or longer. Eighty-six impotent men had a follow-up of eighteen months or longer. The remaining 77 patients were studied for at least twelve months or longer. There have been 3 mechanical failures of cylinders implanted secondary to nonabsorbable surgical sutures remaining from previous prosthetic surgery. There were no reservoir or pump malfunctions. Eight patients had a slow leak from the nonkinking tubing. Since a revision of the manufacturing process of the nonkinking tubing in September, 1983, there have been no further leaks. Life table analysis for survival in this group of patients showed a probability of survival at three years of 97.9 per cent. The satisfaction rate among patients is greater than 90 per cent.