title: Manufacturers' data show increasing implanted cylinder sizes and measured corporal lengths in inflatable penile implants.
abstract: BACKGROUND
  We sought to determine whether measured corporal length (MCL) or implanted device size (IDS) has changed.
  
  
  METHODS
  Data were obtained from the two major penile implant companies from the years of 2005-2010 and analyzed. While we requested similar data, companies supplied information at their discretion with MCL provided by American Medical Systems and IDS provided by Coloplast. Intra-patient corporal discrepancies, disease state effects, rear tip extenders (RTEs) use and place of implantation were also provided in some part by companies.
  
  
  RESULTS
  MCL and IDS increased during the study period. Despite the general trend of MCL/IDS, clinically significant (0.5 cm or greater) decreases in MCLs were noted in patients with Peyronie's disease (PD) or a history of radical pelvic surgery (excludes prostatectomy). In only 2.7 % of cases was there an intra-patient discrepancy in cylinder size (>1 cm). IDS was longer in the USA (US, 19.4 cm) compared to outside the US (OUS, 17.7 cm, p < 0.0001). Cylinders were implanted without RTEs in 48.3 % of US cases and 73.7 % of OUS cases (p < 0.0001). In Coloplast devices there was an overall statistically significant change in the use of 16 cm (less utilized) and 20 and 22 cm (more utilized) cylinder lengths during the study period in US implants.
  
  
  CONCLUSIONS
  MCL and IDS increased during the study period. Men with a history of PD or radical pelvic surgery are at highest risk to have shorter MCL and to possibly receive shorter implants. Intra-patient IDS inconsistency is rare and should prompt investigation.
authors.affiliation: Division of Urology, Albany Medical College, 23 Hackett Boulevard, Albany, NY, 12208, USA. cwelliver@communitycare.com.|Division of Urology, Albany Stratton Veterans Affairs Hospital, Albany, NY, USA. cwelliver@communitycare.com.|Urological Institute of Northeastern New York, Albany, NY, USA. cwelliver@communitycare.com.
authors.forename: Charles
authors.initials: C
authors.lastname: Welliver
authors.affiliation: Division of Urology, Southern Illinois University School of Medicine, Springfield, IL, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Kottwitz
authors.affiliation: Division of Urology, University of Toronto, Toronto, ON, Canada.
authors.forename: Ardalan E
authors.initials: AE
authors.lastname: Ahmad
authors.affiliation: Institute for Urologic Excellence, Indio, CA, USA.
authors.forename: Steven K
authors.initials: SK
authors.lastname: Wilson
authors.affiliation: Division of Urology, Southern Illinois University School of Medicine, Springfield, IL, USA.
authors.forename: Tobias S
authors.initials: TS
authors.lastname: Köhler
mesh_terms: D007172:Erectile Dysfunction / Q000601:surgery*; D006801:Humans; D008297:Male; D009929:Organ Size; D015917:Penile Prosthesis; D010413:Penis / Q000033:anatomy & histology*; D011474:Prosthesis Design
keywords: Erectile dysfunction; Penile implant sizing; Penile length; Penile prosthesis; Peyronie’s disease