A prospective study analyzing both inflation and deflation preference for commonly available inflatable penile prostheses


Despite popularity, satisfaction rates of inflatable penile prosthesis (IPP) use can be improved by evaluating the ability to operate devices in the preoperative setting. The purpose of this study was to prospectively analyze the preference of three commonly available IPPs. In total, 125 IPP-naïve men 60 years of age or older were prospectively recruited from an outpatient Urology clinic from June 2019 to January 2020. A questionnaire standardized to all encounters was utilized to collect demographics, selected medical information, and key pinch strength. Participants were then asked to rank three models in terms of preference (from 1 to 3, 1 representing most preferred) for each inflation and deflation in a double-blinded manner. Statistical analysis was performed using ANOVA, a Chi-square test and multivariable logistical regression analysis. The results demonstrated preference for Coloplast Titan (44%) for inflation, and preference for AMS 700 (40%) for deflation. Men who preferred the Coloplast Titan inflation had a lower chance of preferring the AMS 700 MS deflation (OR = 0.29; p = 0.010) and Coloplast Titan Touch deflation (OR = 0.27; p = 0.012). Preference for Coloplast Titan was weakly associated with participant history of coronary artery disease (OR = 5.96, p = 0.006) and osteoarthritis (OR = 3.04, p = 0.044). Neither key pinch strength nor age was associated with preference for a particular model. IPP-naïve men over 60 years favor Coloplast Titan for inflation and AMS 700 for deflation, and men who preferred the Coloplast Titan for inflation were less likely to choose the AMS 700 MS or Coloplast Titan Touch for deflation. Further studies should aim to confirm these findings.

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Fig. 1: Inflatable penile prosthesis (IPP) teaching model.
Fig. 2: Measuring key pinch strength.
Fig. 3: Inflatable penile prosthesis (IPP) models.


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We would like to acknowledge both AMS and Coloplast for their provision of the inflatable penile prosthesis models that were utilized in this study.

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Correspondence to Vinayak Madhusoodanan.

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RR is a consultant and grant recipient for both AMS and Coloplast.

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Madhusoodanan, V., Best, J., Kalahasty, K. et al. A prospective study analyzing both inflation and deflation preference for commonly available inflatable penile prostheses. Int J Impot Res (2020). https://doi.org/10.1038/s41443-020-0339-0

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