Comparing Risk Factors for Adverse Outcomes in Virgin Inflatable Penile Prosthesis Implantations and Revisions: A Retrospective Cohort Study

Introduction: Recent studies place the risk of infection following inflatable penile prosthesis (IPP) implantation at 1–2%. This risk may be underestimated due to the exclusion of high-risk patients, such as patients undergoing multiple revisions or revision following IPP infection, from data. Aim: To calculate the rate of postoperative complications for all patients undergoing IPP implantation and revision, and to determine the risk factors predictive of complications following virgin implantation and revision independently. Methods: The charts of 280 patients undergoing 331 IPP implantations performed over the last 20 years at a large academic medical center were reviewed for postoperative complications and suspected preoperative and operative risk factors. Main Outcome Measure: This included the prevalence of adverse operative outcomes including postoperative infection and device malfunction. Results: 63 (20.7%) surgeries resulted in postoperative complications: 38 (12.5%) resulting in device malfunction and 25 (8.20%) resulting in infection. Smoking (odds ratio [OR] = 4.14, P =.00) was associated with overall postoperative complications. Within subgroups, concomitant procedures (OR = 4.77, P =.03) were associated with infection for those undergoing virgin implantation, but not those undergoing revision procedures. Alternatively, diabetes mellitus (DM) (OR = 28.3, P =.02) was associated with postoperative infection for those undergoing revision procedures, but not those undergoing virgin implantation. Conclusion: The rate of postoperative infection for all patients undergoing IPP was found to be 8.20%, a higher estimate than historically recorded. To varying degrees, smoking, concomitant procedures, and DM were associated with adverse operative outcomes. Subset analyses revealed significant associations between postoperative infections and either concomitant procedures or DM in those undergoing virgin implantations or revision surgeries, respectively. Miller JA, Bennett NE. Comparing Risk Factors for Adverse Outcomes in Virgin Inflatable Penile Prosthesis Implantations and Revisions: A Retrospective Cohort Study. J Sex Med 2020;8:388–395.