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243
Biomechanical Comparison of Inflatable Penile Implants: A Cadaveric Pilot Study.
Jared J Wallen1, Enrique V Barrera2, Liehui Ge3
1Florida Hospital Tampa Urology, Tampa, FL, USA.
The Journal of Sexual Medicine
|July 2, 2018
Summary
Circumferentially expanding inflatable penile prostheses (IPPs) demonstrated superior biomechanical rigidity compared to other designs. This finding aids in selecting the best penile implant for patients seeking improved erectile function restoration.
Area of Science:
- Urology
- Biomedical Engineering
- Mechanical Engineering
Background:
- Growing interest in biomechanical differences of inflatable penile prostheses (IPPs).
- Significance of these differences for patient experience and outcomes.
- Need for comparative biomechanical assessment of commonly used IPPs.
Purpose of the Study:
- To assess and compare the biomechanical properties of three leading IPPs.
- Evaluate the impact of rear tip extenders (RTEs) on IPP performance.
- Provide data to guide penile implant selection.
Main Methods:
- Biomechanical testing (column compression, cantilever deflection, 3-point bending) of AMS CX, AMS LGX, and Coloplast Titan IPPs.
- Surgical implantation into three fresh cadavers using an infrapubic approach.
- Blinded testing and analysis of IPP properties within the tunica albuginea.
Main Results:
- All three implants performed similarly at maximum inflation.
- The AMS LGX showed reduced performance at less than maximum inflation.
- Coloplast Titan exhibited slightly better rigidity in horizontal and 3-point flexure testing in specific scenarios.
- Circumferentially expanding devices generally showed greater resistance in biomechanical testing.
Conclusions:
- All tested IPPs can functionally restore erectile capacity.
- Circumferentially expanding penile prostheses demonstrated superior biomechanical rigidity.
- Biomechanical properties should guide the selection of inflatable penile prostheses for patients.
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