Optimal Modeling: an Updated Method for Safely and Effectively Eliminating Curvature During Penile Prosthesis Implantation

[Current treatment concepts for Peyronie's disease]

Plastic induration of the penis (PIP, Peyronie's disease) is an acquired and chronic disease of the penis, which is characterized by penile pain, distortion and deformation of the penis as well as the resulting impairments in sexual activity of the patient. The most probable causes are microtrauma and macrotrauma within the tunica albuginea of the corpora cavernosa, which due to an abnormal wound healing subsequently leads to the formation of fibrosis in this region. Various predisposing factors and also a genetic predisposition are discussed. The PIP occurs most frequently in the fifth to sixth decades of life. The prevalence is 0.3-20% depending on the investigated collective and the risk factors present. The PIP is subdivided into an acute inflammatory phase and a chronic postinflammatory phase. Various conservative and surgical treatment options include oral medication, penile traction therapy, intralesional injections and surgical procedures.

Residual penile curvature correction by modeling during penile prosthesis implantation in Peyronie's disease patients

With the advent of new surgical techniques to treat Peyronie's disease with concomitant erectile dysfunction, there remains a question of whether manual modeling (MM), an older technique, still has a place in the treatment algorithm within penile prosthesis (PP) surgery. While the implantation of a PP often corrects moderate to severe curvature, penile curvature can remain greater than 30°, even when concurrent MM is performed during prothesis implantation. There are new variations of the MM technique that have been recently utilized in the intraoperative and postoperative setting to achieve penile curvature less than 30° when the implant is fully inflated. The inflatable PP, regardless of the specific model of choice, is preferred over the noninflatable PP when utilizing the MM technique. MM should be the first line of treatment for persisting intraoperative penile curvature after the placement of a PP due to its long-term efficacy, noninvasive approach, and significantly low risk of adverse effects.

The clinical significance of imperfection: is idiopathic corporal asymmetry related to curvature during penile prosthesis placement?

Patient satisfaction after inflatable penile prosthesis (IPP) has been linked to preexisting curvature; however the association with intraoperative asymmetric corporal measurements (ACM) has not been well described. We sought to identify incidence of ACM during IPP surgery, and relationship to penile curvature. A retrospective review of all patients undergoing primary IPP placement between 6/2019 and 6/2021 was performed. Logistic regression analysis was performed to identify factors associated with ACM and need for adjunct straightening techniques. A total of 273 patients underwent primary IPP. 27.8% had Peyronie's disease (PD) diagnosed preoperatively or detected intraoperatively. ACM was identified in 20.1% (55/273) patients. There was no significant difference in ACM in PD versus non-PD patients (p = 0.55). Most patients with ACM (78.2%, 43/55) underwent placement of asymmetric device. ACM did not predict need for invasive straightening maneuvers (p = 0.12). However ACM patients were significantly more likely to have mild residual curvature than those with symmetry (p < 0.0001). Our study is first to address management of idiopathic ACM and association with curvature, providing new insight into a common situation. While ACM was detected in 20%, it did not predict need for adjunct straightening techniques. Our findings may provide reassurance to urologists troubleshooting idiopathic ACM during corporal dilation during IPP surgery.

A comprehensive narrative review of residual curvature correction during penile prosthesis implantation in patients with severe erectile dysfunction and concomitant Peyronie's disease

Residual curvature correction during penile prosthesis implantation (PPI) is usually needed in patients with severe erectile dysfunction (ED) and concomitant Peyronie’s disease (PD). The aim of the study was to assess the different existing techniques for treating residual penile curvature during PPI in patients with severe PD and ED. We generated a comprehensive narrative review of the literature until August 2020 on the use of PPI in combination with straightening reconstruction techniques, in treating patients with severe PD and ED. We included studies published in English, assessing the PPI as primary intervention in patients with PD and ED. Secondary research studies and studies with insufficient data were excluded from final analyses. We included a total of 33 clinical articles with 1,612 patients that assessed the effects of PPI combined with straightening surgical techniques for the treatment of severe PD and ED. Based on the severity of penile curvature, the concomitance of additional penile deformities (i.e., hourglass deformity), the penile length, the presence of previous penile operations and the surgeon’s experience, four main categories of surgical techniques were identified: (I) PPI with plication of the penis on the convex side of the curvature, (II) transcorporeal plaque incision/excision, (III) PPI with plaque/tunical incision(s) on the concave side of the curvature and (IV) PPI with plaque incision/excision plus grafting. Patients with severe PD and ED can expect excellent outcomes with PPI and surgical correction of residual penile curvature and minimal side effects. Overall, all the above techniques seem to able to correct the residual penile curvature during prosthesis implantation. Grafting techniques seem to be favorable in patients with additional severe penile shortening. Still, no definite conclusions can be drawn regarding the superiority of one technique over the other.

Nuances of infrapubic incision for inflatable penile prosthesis

This workshop completes the trilogy of nuances of the various incisions used to place an inflatable penile prosthesis (IPP). Infrapubic placement was the original technique employed 50 years ago for the very first IPP surgeries. The historical perspective of the development of implantation incisions and the original Scott prosthesis highlighted in this work should be fascinating to today's younger prosthetic urologists. The developing surgeon should also find some surprising maneuvers considered important technique nuances from the highest volume infrapubic implanter in the world. Among the wonders of the infrapubic approach covered are: The surgery is conducted without the aid of an in-dwelling Foley catheter or post-operative inflation. Hydrodistension of the corpora substitutes for corporal dilatation. The "chicken choke" protects the urethra from damage. Closed suction drainage is employed despite minimal scrotal dissection. Motivated patients may use their new device as early as 14 days after implantation.