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How Many Inches Can an Inflatable Penile Prosthesis Add?

Penile Prosthesis
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Detailed Answer

Inflatable penile prosthesis (IPP) surgery is designed to restore erectile function in men with severe erectile dysfunction, not to increase penile length. According to the 2025 EAU Guidelines on Sexual and Reproductive Health, penile prosthesis implantation should not be performed in patients seeking penile lengthening options [1].

In clinical studies, many men report a perceived shortening of the penis following IPP surgery. Research has shown that approximately 30% of patients experience a decrease in penile length after IPP implantation [2]. Objective measurements have demonstrated a reduction in erect penile length ranging from approximately 0.5 cm to 1.0 cm when comparing pre-operative measurements to post-operative outcomes [3].

The psychological impact of these perceived changes is a common source of postoperative dissatisfaction. Patient counseling about realistic expectations is therefore essential before proceeding with surgery.

For men with severe penile shortening due to Peyronie’s Disease (PD), more complex reconstructive procedures can be performed alongside IPP implantation. These include surgical techniques such as plaque incision or partial excision and grafting, which may help address both the curvature and length concerns in selected patients [4]. However, these procedures carry additional risks and are not standard options for routine cases.

The EAU Guidelines emphasize that patients considering IPP should have realistic expectations: the primary goal is to restore rigidity for sexual function, not to enlarge the penis [1]. Any expectations regarding size changes should be discussed thoroughly with a urologist before surgery, particularly if additional reconstructive procedures are being considered.

From the Guidelines

"Do not perform penile prosthesis implantation in patients seeking penile lengthening options."

EAU Guidelines (2025)

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