title: AMS 700CX/CXM inflatable penile prosthesis has high mechanical reliability at long-term follow-up.
abstract: BACKGROUND
  AMS 700CX/CXM inflatable penile prosthesis is increasingly applied for the treatment of erectile dysfunction (ED). However, there are a few long-term survival data of the inflatable penile prosthesis (IPP) over 10 years.
  
  
  OBJECTIVE
  To determine the long-term mechanical reliability of AMS 700CX/CXM inflatable penile prosthesis in patients with ED.
  
  
  METHODS
  A total of 438 consecutive patients with ED received implantation of an AMS 700CX/CXM penile prosthesis at our institution from January 1991 to April 2009. In 397 patients (90.7%), the medical records were available and current status of penile prosthesis could be obtained by a direct telephone interview. The overall and mechanical survival rates of penile prosthesis were evaluated using Kaplan-Meier method.
  
  
  METHODS
  Assessing the mechanical and overall survival rates of the AMS 700CX/CXM penile prosthesis using Kaplan-Meier analysis, and looking for clinical factors related to survival of the CX/CXM using log-rank test.
  
  
  RESULTS
  Mean age of 397 patients was 63.1 years (range, 24-93) and follow-up duration was 113 months (range 1-219). Eighty-two patients (20.6%) experienced mechanical failure at a median follow-up of 82 months. Mechanical survival rate of the penile prosthesis was 97.6%, 93.2% and 78.2% at 3, 5, and 10 years after implantation, respectively. 12 patients (3.0%) experienced nonmechanical failure including infections, tissue erosion resulting in cylinder protrusion at the meatus and chronic discomfort. Overall survival rate of the penile prosthesis was 95.0%, 91.0% and 75.5% at 3, 5, and 10 years after implantation, respectively. Patients with neurogenic cause for ED showed lower median overall survival of penile prosthesis compared with patients with non-neurogenic cause. Patient age, obesity, and diabetes mellitus had no association with overall survival of penile prosthesis after implantation.
  
  
  CONCLUSIONS
  The AMS 700CX/CXM could be accepted and applied in more patients as a reliable treatment alternative of ED.
authors.affiliation: Department of Urology, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Dong Suk
authors.initials: DS
authors.lastname: Kim
authors.forename: Kwang Mo
authors.initials: KM
authors.lastname: Yang
authors.forename: Hyun Jin
authors.initials: HJ
authors.lastname: Chung
authors.forename: Hyun Min
authors.initials: HM
authors.lastname: Choi
authors.forename: Young Deuk
authors.initials: YD
authors.lastname: Choi
authors.forename: Hyung Ki
authors.initials: HK
authors.lastname: Choi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D018783:Impotence, Vasculogenic / Q000601:surgery / Q000628:therapy*; D053208:Kaplan-Meier Estimate; D007723:Korea; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D015917:Penile Prosthesis; D011183:Postoperative Complications; D011474:Prosthesis Design / Q000706:statistics & numerical data*; D011475:Prosthesis Failure; D012189:Retrospective Studies; D011795:Surveys and Questionnaires; D013997:Time Factors; D055815:Young Adult