Penile prosthesis implant: scientific advances and technological innovations over the last four decades

Initial linguistic and cultural validation of the satisfaction survey for inflatable penile implant (SSIPI) in Spanish

INTRODUCTION

The Satisfaction Survey for Inflatable Penile Implant (SSIPI) is useful tool to assess patient outcomes after inflatable penile prosthesis (IPP) surgery. However, this survey is not validated in Spanish. This work aims to report the initial steps carried out for the linguistic validation of the SSIPI translation into Spanish.

METHOD

The linguistic validation process had the following steps: (i) SSIPI forward translation, (ii) reconciliation, (iii) back translation, (iv) harmonization, review, and correction of the translation, and (v) cognitive interviewing and testing the new translated version. Urologists from Spain, South America, and the United States participated in these steps. The last step was performed in 3 centers: (i) Medellín, Colombia; (ii) Florida, United States; and (iii) Madrid, Spain.

RESULTS

19 Spanish-speaking patients tested the initial translated version of SSIPI. Most patients found the translated SSIPI questionnaire easy to understand; however, of the 16 questions, patients most frequently commented that questions 3, 5, and 7 should be modified. The median number of observations or comments per question was 1 (1, 3). Based on these suggestions, the research group adapted the questionnaire to obtain the final version in Spanish.

CONCLUSION

This study evaluates the initial steps for the translation and linguistic validation of the SSIPI questionnaire into Spanish. The results indicate a remarkable level of readability and comprehension, while some challenges were observed in certain questions. This work demonstrates that a standardized and protocolized process is needed to translate and validate surveys into Spanish.

Economic impact of reduced postoperative visits after inflatable penile prosthesis implantation

Aim: This study assessed the economic impact of reducing one postoperative visit following inflatable penile prosthesis (IPP) implantation. Methods: Scenario analyses were used to model the effects of eliminating one 30-min IPP postoperative visit from the expected 2.5 visits accounted for by the American Medical Association resource-based relative value scale data. The reduction was attributed to simplified teaching with a modified device. The recaptured time was applied to: the most frequent in-office CPT codes utilized by IPP implanters; evaluation and management of new ED patients pursuing/receiving IPPs; and in-office vasectomy. Physician work time and reimbursement were conservatively estimated using the 2024 Medicare Physician Fee Schedule and an alternative scenario where Advanced Practice Providers conducted IPP teaching was also modeled. Results: Annually, reducing one 30-min IPP postoperative visit for practices performing 25/50/100 IPP implants recaptured 750/1500/3000 min, respectively. This recaptured time translates into as much as $18,325 additional annual Medicare reimbursement. At 25 implants yearly, urologists could help an additional 13-25 patients with office visits and observe an additional $2049-$2270 reimbursement. At 50 implants yearly, office evaluation and counseling for 7 ED patients who progress to IPP implantation results in an additional $4125 reimbursement, excluding any diagnostic procedures and/or downstream surgical cases. At 100 implants yearly, recaptured schedule capacity can facilitate 37 in-office vasectomies, which translates to a $12,563 reimbursement. Conclusion: Achieving fewer IPP postoperative visits can optimize postoperative care and open schedule capacity that improves access to care for patients with urological needs.

How to improve functional outcome of inflatable penile implant surgery? a narrative review

The implantation of a three-piece inflatable penile prosthesis (IPP) has been shown to be a safe and successful treatment with a high satisfaction rate among individuals with erectile dysfunction. This narrative review aims to explore ways to improve the functional outcomes of IPP implantation. We conducted an English-language narrative review using all relevant articles sourced from PubMed. Over the years, modifications in IPP surgery have focused on increasing the longevity of prostheses and improving functional outcomes. These modifications include advancements in surgical methods, implant types, intracorporeal tubing length, the use of rear tip extenders, and reservoir placement. IPP implantation continues to significantly improve quality of life, making it essential for surgeons to stay updated on the latest developments and research to ensure the best outcomes for their patients. Optimal functional outcomes are achieved by an experienced surgical team and the use of a safe, rapid, minimally invasive surgical technique with the latest technology and equipment.

MR imaging of penile pathology and prostheses

Penile MRI is a vital yet underutilized diagnostic tool that provides detailed information crucial for managing various penile pathologies. Due to its infrequent use, many radiology trainees lack confidence in interpreting these exams. This article reviews the anatomy, key technical considerations, and interpretive pearls for penile trauma, Peyronie's disease, priapism, penile neoplasms, prosthesis evaluation, and a few miscellaneous conditions. Through illustrative case examples, this review aims to enhance the understanding and proficiency of radiologists in performing and interpreting penile MRI in these clinical scenarios.

Twisting of Inflatable Penile Prosthesis Tubing Leading to Device Malfunction and Required Explantation: A Rare Complication

Erectile dysfunction (ED), the impairment of achieving and maintaining an erection for satisfactory sexual intercourse, is a common pathology that men experience for a variety of different factors. Conservative treatment for ED includes changing medications, lifestyle modifications, and psychotherapy. Pharmaceutical and nonsurgical interventions include phosphodiesterase-5 inhibitors(PDE-5i), intracavernosal medication injections, and vacuum devices. Surgical treatment options for ED have evolved over time and currently include the use of inflatable penile prosthesis (IPP) and malleable penile prosthesis. IPP insertion is usually met with good patient satisfaction. However, complications of device insertion can include corporal perforation, urethral injury, cylinder erosion or extrusion, infection, and mechanical failure, to name a few. Our patient presented with device malfunction and intraoperative assessment showed the IPP tubing twisted at the levels of the reservoir on the first operation and the level of the cylinder and scrotal pump on the second operation. The twisting of the tubing resulted in a nonfunctioning IPP as the fluid was unable to fill the cylinders resulting in an erection. The patient was managed with complete device explanation and reinsertion of a new three-piece IPP per the patient and partner's request. This is the first case report highlighting this specific complication, and we hope to provide clinicians with the resources to recognize this rare complication.

Penile prosthesis for erectile dysfunction in France: A six-year nationwide database analysis

INTRODUCTION

Urological consultations for erectile dysfunction (ED) are increasing worldwide. Penile prosthesis (PP) implantations are performed when other treatments are unsuccessful. However, there is no data regarding PP implantations in France beyond the year 2016.

OBJECTIVES

This study aimed to describe the changes in the number and type of PP implants used for the treatment of ED in France from 2016 to 2021 and the hospitalization rates following implantation using French national data from the Program for the Medicalization of Information Systems (PMSI).

MATERIALS AND METHODS

We analyzed data on PP implantations in all France hospitals. PPs were coded into three types according to the Common Classification of Medical Procedures (CCAM). The number of patients admitted to hospital with complications twelve months after implantation was also recorded.

RESULTS

During the study period, 3675 men received 3868 PPs in France. A gradual increase in the total number of implanted PPs was observed, with an overall increase of 33.8%. In 2020, there was a sharp decline in the number of implanted PPs, primarily owing to the COVID-19 pandemic. The most commonly used implant was PPs with an extracavernous compartment, comprising 85% of all PPs. Twelve months after implantation, only 1-2% of the patients were rehospitalized.

CONCLUSION

PP implantation surgeries are highly reproducible and have a low incidence of complications, in terms of rehospitalization after one year of placement (1.8%). Moreover, there was an increase in the demand for penile prosthesis implantations in France between 2016 and 2021.

LEVEL OF EVIDENCE

4: Descriptive epidemiological study.

A narrative review on synchronous concurrent versus delayed sequential surgery in the artificial urinary sphincter and penile prosthesis implantation

Background and Objective

In a patient who complains of both stress urinary incontinence (SUI) and erectile dysfunction (ED), prosthetic surgery with a urinary continence device and penile prosthesis implant can offer a definitive solution to address both problems. The AMS 800 artificial urinary sphincter (AUS) device is considered the standard of care to restore SUI while the inflatable penile prosthesis (IPP) device is thought to be superior to a malleable prosthesis to provide a more natural penile erection with higher patient satisfaction rates. The following article explores the current understanding of AMS 800 AUS surgery and IPP device in treating males with concurrent SUI and ED as well as evaluates the advantages and disadvantages of concurrent synchronous dual vs. delayed or staged device implantation.

Methods

The available literature on AUS and IPP implantation was reviewed on PubMed and Embase databases between 1 January 2000 and 1 December 2022. This narrative review evaluates relevant key features pertaining to prosthetic surgery with an emphasis on arguments for concurrent synchronous dual vs. delayed sequential surgery for AUS and IPP devices. Additionally, this paper provides a brief surgical description of the techniques and potential complications relating to both prosthetic procedures.

Key Content and Findings

While a great deal is known about the excellent outcomes of both AUS and IPP implantation, there is limited literature published on the outcomes of dual AUS and IPP surgery. The decision to proceed with concurrent synchronous dual vs. delayed sequential two-stage implants is likely determined by the patient's preference, the surgeon's expertise, and the availability of prostheses. In either situation, patients should be counselled regarding the advantages and disadvantages of undergoing synchronous concurrent vs. delayed sequential implants and associated surgical challenges are likely dependent on the patient's anatomy and the surgeon's preference.

Conclusions

For carefully selected patients with SUI and ED, dual implantation of AUS and IPP provides a definitive treatment to address both conditions at the same time. Patients should be counselled regarding the advantages and disadvantages of synchronous concurrent vs. sequentially delayed implants while technical considerations regarding the sequence of prosthetic device surgery are likely dependent on the patient's factors and the surgeon's preference and surgical expertise.

Infection rate of penile prosthesis implants in men with spinal cord injury: a meta-analysis of available evidence

The risk of penile prosthesis implants (PPIs) infection in men with spinal cord injury (SCI), empirically theorized to be high, is widely variable among the studies. We performed a meta-analysis to define the pooled PPI infection rate and its possible risk factors in men with SCI. A thorough search of PubMed, Scopus and Web of Science was performed. The eighteen included studies provided information on 1079 implantation procedures, determining a pooled PPI infection rate of 8.0% (95% CI: 5.0-11.0%), with significant heterogeneity (I² = 67.0%). Trim-and-fill adjustment for publication bias had a small effect on the pooled estimate (adjusted odds ratio: 6.3%, 95% CI: 2.5-10.0%) with a substantial reduction in heterogeneity (I2 = 32.4%). The PPI infection rate was higher for inflatable PPIs than for malleable PPIs (16.4% vs 8.9%, p = 0.027). No differences were found between the different levels of SCI. In conclusion, the risk of PPI infection in SCI would be higher than that reported in the general population. However, the results were produced from dated and low/moderate quality studies that may not fully reflect the outcomes of modern PPIs and implantation protocols. There is an urgent need to gather more information on this topic through studies relevant to contemporary practice.

Quality of life and sexuality with penile prosthesis: a systematic review and pooled analysis

INTRODUCTION

Quality of Life and Sexuality with Penile Prosthesis (QoLSPP) is the first validated questionnaire to specifically evaluate the satisfaction of patients undergoing penile prosthesis implantation. Our primary aim was to conduct a systematic review and pooled analysis of articles reporting QoLSPP.

EVIDENCE ACQUISITION

A comprehensive bibliographic search on the MEDLINE, Scopus, Web of Science, and Cochrane Library databases was performed in April 2023. Studies were selected if they assessed male subjects (P) undergoing penile prosthesis implantation (I) with or without comparison with other treatments (C), reporting the patient satisfaction according to QoLSPP (O). Prospective and retrospective original studies were included (S). The risk of bias was assessed using the ROBINS-I tool and the Knoll method. Means and standard deviations (SDs) of QoLSPP scores were included in the pooled analysis. PROSPERO ID: "CRD42023427261."

EVIDENCE SYNTHESIS

A total of 10 studies investigating 1105 patients were included in the systematic review; of these, eight articles describing the outcomes of 693 subjects were eligible for the pooled analysis. Overall serious risk of bias was found in 2/3 of nonrandomized comparative studies (66%), while seven single-arm studies (100%) were classified as having a high risk of bias. Pooled analysis of the QoLSPP-Functional domain revealed an overall effect size (ES) of 4.22 points (95% CI 4.04-4.40; P<0.001). The QoLSPP-Relational pooled score was 4.17 points (95% CI 4.03-4.31; P<0.001). The QoLSPP-Social pooled score corresponded to 4.21 points (95% CI 4.02-4.40; P<0.001). Pooled analysis of the QoLSPP-Personal domain showed an overall ES of 3.97 points (95% CI 3.61-4.32; P<0.001). There was insufficient data to pool QoLSPP total scores.

CONCLUSIONS

Patients undergoing penile prosthesis implantation report positive scores in all QoLSPP domains, demonstrating high satisfaction levels. Future studies are needed to improve the evidence on the topic.

Addressing the need for preclinical study of penile prosthesis infection: a new animal model and narrative review

Background and Objective

Erectile dysfunction (ED) is a common condition in men, and many patients refractory to conservative treatment may undergo penile prostheses (PPs) placement. The primary concern following PP implantation is device infection. Although antibiotic and hydrophilic coatings have reduced the incidence of inflatable PP (IPP) infections, there remains room for improvement. Optimization of PP outcomes requires a practical in vivo model to better understand mechanisms of infection and to test new infection control strategies. We aimed to describe a new rabbit model which contains a functional IPP and review previously reported animal PP models.

Methods

An IPP was placed into rabbit flanks and cycled for functionality testing. Rabbits were evaluated for signs of pain and distress over 14 days. Separately, narrative review methodology was utilized to search the PubMed and Scopus databases for all publications through March 21, 2023, which studied PP within an in vivo setting. Three independent reviewers ultimately selected 12 papers from 1992-2021 for inclusion.

Key Content and Findings

Several animal studies highlighted the initial functionality or feasibility of devices for ED before their introduction in the clinical setting. There are several subsequent studies aimed at optimizing the type of antibiotic use or coating material using segments of PP material in an in vivo setting. However, the literature lacks a contemporary animal model containing a functional IPP. Our novel rabbit model offers a safe, practical way to implant a functioning IPP and investigate new perioperative infection prevention and treatment strategies before trials in the clinical setting.

Conclusions

Animal models have played a key role in testing medical devices, including PPs, prior to their clinical introduction. Our review uncovered no modern animal studies involving placement of a functional PP. A new animal model can facilitate study of evolving microorganism profiles, novel methods to enhance antibiotic delivery, and proposed treatment options.

A narrative review on malleable and inflatable penile implants: choosing the right implant for the right patient

A penile prosthesis/implant is an excellent option for men with erectile dysfunction refractory to medical treatment or with contraindications to medical management. In this narrative review, we discuss the different types of penile prostheses and the considerations for patient and device selection to maximize satisfaction. There are three main prosthesis types to choose from: three-piece inflatable devices, two-piece inflatable devices, and malleable/semirigid devices. The three-piece devices are the gold standard in advanced economy countries but require reservoir placement and manual dexterity, which can be limiting to some patients. The two-piece inflatable devices are a good option for patients who have standard-sized penises, lack significant penile pathology, have limited dexterity issues, or should avoid reservoir placement due to potential complications. The malleable devices are popular in countries where insurance coverage is limited but are increasingly used in advanced economy countries for length conservation in specific patient populations. Finally, not every patient needs an implant, and assessing partner sexual function is an important consideration for patient-partner satisfaction. Surgeons need to be familiar with the strengths and limitations of each device and the patient characteristics that will yield the best outcome from penile prosthesis surgery.

Analysis of the effects of different surgical approaches on corporotomy localization in inflatable penile implant surgery performed by expert implant surgeons

Inflatable penile prostheses may be a solution for patients with erectile dysfunction. To our knowledge, no data exist regarding the effect of different surgical approaches used during implantation on the site of the corporotomy. The main purpose of this multicentre study was to investigate the influence of different surgical approaches on the corporotomy site.Data were collected from six expert implant surgeons. Surgical notes were searched for the incision site, proximal, distal and total corporal length measurement, total cylinder length, length of rear tip extenders, surgery time, type of implant, and reservoir placement. The association between the proximal/distal corporal length and the recorded covariates was examined using a linear mixed model.A total of 1757 patients who underwent virgin prosthesis implantation were included in the analysis. Analysis of proximal/distal measurements was performed on 1709 patients. The proximal/distal ratio had a mean of 0.8 ± 0.3 in penoscrotal incisions (n = 391), 0.7 ± 0.2 in infrapubic incisions (n = 832) and 0.7 ± 0.2 in subcoronal (n = 486) incisions. We observed no significant differences in proximal/distal measurements between the highest-volume surgeons.We could not draw a firm conclusion about the difference in corporotomy site between different surgical approaches, but we found no significant difference between the highest-volume surgeons using different techniques.

Erectile Dysfunction: Treatments, Advances and New Therapeutic Strategies

Erectile dysfunction (ED) is the inability to get and maintain an adequate penile erection for satisfactory sexual intercourse. Due to its negative impacts on men's life quality and increase during aging (40% of men between 40 and 70 years), ED has always attracted researchers of different disciplines, from urology, andrology and neuropharmacology to regenerative medicine, and vascular and prosthesis implant surgery. Locally and/or centrally acting drugs are used to treat ED, e.g., phosphodiesterase 5 inhibitors (first in the list) given orally, and phentolamine, prostaglandin E1 and papaverine injected intracavernously. Preclinical data also show that dopamine D4 receptor agonists, oxytocin and α-MSH analogues may have a role in ED treatment. However, since pro-erectile drugs are given on demand and are not always efficacious, new strategies are being tested for long lasting cures of ED. These include regenerative therapies, e.g., stem cells, plasma-enriched platelets and extracorporeal shock wave treatments to cure damaged erectile tissues. Although fascinating, these therapies are laborious, expensive and not easily reproducible. This leaves old vacuum erection devices and penile prostheses as the only way to get an artificial erection and sexual intercourse with intractable ED, with penile prosthesis used only by accurately selected patients.

State-of-art review of current malleable penile prosthesis devices in the commercial market

The malleable penile implant is often considered an inferior device to the three-piece inflatable penile prosthesis implant. Nonetheless, the malleable prosthesis has its unique advantages such as lower cost, easier to perform and fewer mechanical complications than inflatable prostheses. Furthermore, its role can be extended to patients with issues relating to poor manual hand dexterity, those undergoing a salvage for infection prosthesis and as an emergency surgical measure in patients presenting with acute ischaemic priapism. Over the past few decades, there have been numerous design and technological advancements to improve overall clinical efficacy, mechanical durability, axial rigidity and device concealability of malleable penile prostheses. The following article provides a narrative review of the six major contemporary malleable penile prosthesis devices in the commercial market, namely, the Coloplast Genesis prosthesis, the Boston Scientific Tactra prosthesis, the Zephyr ZSI 100 and 100 (female-to-male) FTM devices, the Rigi10 prosthesis, the TUBE malleable prosthesis and the Shah prosthesis and evaluates the published outcomes. Appropriate patient selection and strict counselling regarding what to expect with malleable prostheses coupled with adherence to safe surgical principles are paramount to ensure excellent clinical success and patient satisfaction rates.

Which patient may benefit the most from penile prosthesis implantation?

BACKGROUND

Penile prosthesis implantation has been associated with overall good functional outcomes. Of relevance, some patients reported higher level of satisfaction and quality of life.

AIM

We investigated the profile of the patients who may benefit the most from penile prosthesis implantation.

MATERIALS AND METHODS

Data from a national multi-institutional registry of penile prostheses including patients treated from 2014 to 2017 in Italy (Italian Nationwide Systematic Inventarization of Surgical Treatment for Erectile Dysfunction) were analyzed. All data have been prospectively recorded by 45 surgeons on a dedicated website (www.registro.andrologiaitaliana.it) and revised by a single data manager. Patients' baseline characteristics were recorded. In order to simultaneously evaluate perceived penile prosthesis function and quality of life, all patients were re-assessed at 1-year follow-up using the validated questionnaire Quality of Life and Sexuality with Penile Prosthesis. High quality of life after surgery was defined as a score higher than the 75th percentile in each of the subdomains of the Quality of Life and Sexuality with Penile Prosthesis questionnaire. Logistic regression analysis tested the association between clinical characteristics and high quality of life after penile prosthesis implantation.

RESULTS

Follow-up data were available for 285 patients (median age 60 years; interquartile range: 56-67) who underwent penile prosthesis implantation. Erectile dysfunction etiology was organic in 40% (114), pelvic surgery/radiotherapy in 39% (111), and Peyronie's disease in 21% (60) of the cases. Patients showed good overall Quality of Life and Sexuality with Penile Prosthesis scores at 1-year follow-up for functional (22/25), personal (13/15), relational (17/20), and social (13/15) domains. Overall, 27.0% (77) of patients achieved scores consistent with the high quality of life definition. These patients did not differ in terms of median age (60 vs. 62), type of prosthesis (inflatable penile prostheses: 95% in both of the cases), and post-operative complications (10% vs. 14%) than those with lower quality of life score (all p &gt; 0.1). At logistic regression analysis, erectile dysfunction etiology was the only factor independently associated with high quality of life at 1 year after surgery (p = 0.02). Patients treated for Peyronie's disease (odds ratio: 2.62; p = 0.01; 95% confidence interval: 1.20-5.74) were more likely to report better outcomes after accounting for age, post-operative complications, and surgical volume.

CONCLUSION

Penile prosthesis implantation is associated with an overall good quality of life. The subset of patients affected by erectile dysfunction secondary to Peyronie's disease seemed to benefit the most from penile prosthesis implantation in terms of functional outcomes, relationship with their partners and the outside world, and perceived self-image. The systematic use of validated questionnaires specifically addressed at evaluating quality of life and satisfaction after penile prosthesis implantation should be further implemented in future studies to better define the predictors of optimal satisfaction after penile prosthesis implantation.

The International Penile Prosthesis Implant Consensus Forum: clinical recommendations and surgical principles on the inflatable 3-piece penile prosthesis implant

Despite significant scientific advances in the modern three-piece inflatable penile prosthesis implant surgery, it is not without surgical risks and can carry additional cosmetic and psychosocial consequences in poorly selected and consented individuals. To address this problem, an international group of key opinion leaders and high-volume prosthetic surgeons reviewed the current guidelines and clinical evidence, discussed their experiences, and formed a consensus regarding inflatable penile prosthesis surgery. The findings of this consensus panel were presented at the 17th biennial Asia Pacific Society of Sexual Medicine scientific meeting. The experts concluded that proper patient selection, informed consent and strict adherence to safe surgical principles are important to optimize clinical outcomes. Furthermore, most intraoperative complications, if recognized, can be addressed intraoperatively to enable placement of the device at the time of initial surgery. Men with significant corporal fibrosis due to Peyronie's disease, prior prosthesis explantation and priapism, and men who have undergone construction of a neophallus, as well as men who receive concurrent continence surgery, are complex cases requiring additional care and advanced techniques to obtain optimal surgical outcomes. Variability in patient care - in terms of postoperative antibiotic use, pain management, scrotal care, and cycling of the penile prosthesis implant - must be reduced to enable optimization and assessment of outcomes across patient groups.

Implants with Sensing Capabilities

Because of the aging human population and increased numbers of surgical procedures being performed, there is a growing number of biomedical devices being implanted each year. Although the benefits of implants are significant, there are risks to having foreign materials in the body that may lead to complications that may remain undetectable until a time at which the damage done becomes irreversible. To address this challenge, advances in implantable sensors may enable early detection of even minor changes in the implants or the surrounding tissues and provide early cues for intervention. Therefore, integrating sensors with implants will enable real-time monitoring and lead to improvements in implant function. Sensor integration has been mostly applied to cardiovascular, neural, and orthopedic implants, and advances in combined implant-sensor devices have been significant, yet there are needs still to be addressed. Sensor-integrating implants are still in their infancy; however, some have already made it to the clinic. With an interdisciplinary approach, these sensor-integrating devices will become more efficient, providing clear paths to clinical translation in the future.

Evaluation of Bacteria in a Novel In Vitro Biofilm Model of Penile Prosthesis

BACKGROUND

Delayed infection, thought to be due to gradual biofilm formation, remains a feared complication after inflatable penile prosthesis (IPP) insertion. Understanding and preventing biofilm formation is necessary to prevent infections.

AIM

To develop an in vitro model and compare growth of biofilm by different bacteria on IPPs and evaluate the anti-infective efficacy of the Coloplast Titan and AMS 700 InhibiZone.

METHODS

Sterile IPPs (Coloplast) were cut into rings and incubated with S. epidermidis, S. aureus, P. aeruginosa, A. baumannii, or K. pneumoniae cultures in tryptic soy broth (TSB) (4 hour) to ensure adequate bacteria attachment, and then in only TSB (120 hours) to allow for biofilm formation. Rings were fixed with ethanol and biofilm measured by spectrophotometer (OD570) after crystal violet staining. This methodology was repeated for S. epidermidis and P. aeruginosa with Coloplast rings dipped in 10 ml of a 10 mg/ml Rifampin, 1 mg/ml Gentamicin, and deionized water solution and undipped AMS InhibiZone rings. Crystal violet assay (OD570) was repeated after incubation within bacteria (2 hour), and then only TSB (120 hours).

OUTCOMES

The primary outcome of the study was OD570 readings, indirectly measuring biofilm mass on implant rings.

RESULTS

S. epidermidis, S. aureus, A. baumannii, P. aeruginosa, and K. pneumoniae all formed significant biofilm. P. aeruginosa showed the strongest predilection to grow biofilm on IPPs. P. aeruginosa also formed significant biofilm on antibiotic-treated Coloplast and AMS rings, while S. epidermidis was inhibited. No significant difference was found in biofilm inhibition between the implants.

CLINICAL TRANSLATION

Our findings suggest gram-negative bacteria may form biofilm more proficiently and quickly on IPPs than gram-positive organisms. Commonly used antibiotic treatments on IPPs may be effective against S. epidermidis but not against P. aeruginosa biofilm formation.

STRENGTHS & LIMITATIONS

This is the first study comparing biofilm formation by different bacteria organisms on IPPs and the inhibitive ability of Coloplast and AMS implants against biofilm formation. Clinical data on organisms responsible for infected IPPs is needed to determine the clinical relevance of our findings.

CONCLUSION

Our novel in vitro model of biofilm formation of IPPs evaluated the effect of a gentamicin/rifampin antibiotic dip on Coloplast Titan implants and the anti-infective capacity of the minocycline/rifampin precoated AMS 700 InhibiZone against S. epidermidis and P. aeruginosa. P. aeruginosa was able to grow on both antibiotic-treated implants, with no significant difference, and should continue to be a specific target of investigation to reduce delayed post-operative IPP infections. Narasimman M, Ory J, Bartra SS, et al. Evaluation of Bacteria in a Novel In Vitro Biofilm Model of Penile Prosthesis. J Sex Med 2022;19:1024-1031.

Current practices regarding corporotomy localization during penoscrotal inflatable penile implant surgery: a multicenter cohort study

Literature concerning corporotomy location in multicomponent inflatable penile prosthetic surgery via a penoscrotal approach is scarce if not nonexistent. Aim of our study was to report practices in low-, moderate-, and high-volume penile implant centers regarding corporotomy location and evaluate its potential impact on intraoperative and short-term postoperative complications. Data from 18 (13 European and 5 American) implant centers were collected retrospectively between September 1st, 2018 and August 31st, 2019. Variables included: intraoperative proximal and distal corpus cavernosum length measurement, total corporal length measurement, total penile implant cylinder length, and length of rear tip extenders. Eight hundred and nine virgin penile implant cases were included in the analysis. Mean age of participants was 61.5 ± 9.6 years old. In total, 299 AMS 700™ (Boston Scientific, USA) and 510 Coloplast Titan® (Minneapolis, MN USA) devices were implanted. The mean proximal/distal corporal measurement ratio during corporotomy was 0.93 ± 0.29 while no statistical difference was found among low-, moderate-, and high-volume penile implant centers. A statistically significant correlation between lower proximal/distal measurement ratio and higher age (p = 0.0013), lower BMI (p < 0.0001), lower use of rear tip extenders (RTE) (p = 0.04), lower RTE length (p < 0.0001), and absence of diabetes (p = 0.0004) was reported. In a 3-month follow up period, 49 complications and 37 revision procedures were reported. This is the first study reporting the current practices regarding corporotomy location during IPP placement in a multicenter cohort, particularly when including such a high number of patients. Nevertheless, the retrospective design and the short follow up period limits the study outcomes. Corporotomy location during penoscrotal IPP implantation does not correlate with intraoperative or short-term postoperative complication rates. Future studies with longer follow up are needed in order to evaluate the association of corporotomy location with long-term complications.

MRI of Penile Prostheses: The Challenge of Diagnosing Postsurgical Complications

Penile implants are surgically inserted devices used for the treatment of erectile disfunction. Improvements in surgical techniques and in the manufacturing of these implants have reduced the risk of intra- and postoperative complications and increased the popularity and use of this therapeutic option. Routine imaging is not recommended before penile prosthesis surgery. Malleable penile prostheses use noninflatable shafts inserted into each corpus cavernosum, which appear hypointense on T1- and T2-weighted MR images. Inflatable penile prostheses (IPPs) may consist of two or three parts and are composed of two cylinders inserted into the corpora cavernosa that are filled with a saline solution to produce rigidity. These appear homogeneously T2 hyperintense and the silicone-based covering of the cylinders appears T2 hypointense, thereby clearly delineating the cylinders. In the case of three-piece IPPs, a reservoir containing the fluid may be placed in the pelvis. The most frequent complications are related to infection and mechanical failure, the latter being more common in IPPs because more components are involved. Less common complications include malpositioning. Detection and management of postoperative complications are challenging, and MRI plays a crucial role as it permits evaluation of the positioning and configuration of the prosthesis components, as well as assists in functional evaluation of IPPs when images are obtained of both the flaccid and inflated states. ^©RSNA, 2021.

Penile implant infection factors: a contemporary narrative review of literature

Objective

We aim to review and summarize published literature that features implanted penile devices and details infection of these devices as a complication. In particular, we will detail the factors that influence infection of penile implants.

Background

Types of penile prostheses (PP) include inflatable implants and semirigid implants; these are utilized for treatment of erectile dysfunction. Likely the most feared complication of penile implants is infection. There are a handful of factors that are implicated in device infection.

Methods

Searches were performed using MEDLINE and PubMed databases using keywords and phrases ‘penile implant AND infection’; ‘penile prosthesis AND infection’; ‘penile implant infection’. We have presented results from our literature search. We divided these into ‘Surgical Elements’ and ‘Patient Selection and Factors.’ Each topic is discussed in its own section.

Conclusions

Strides have been made since the initial penile prosthesis (IPP) surgeries to improve infection rates including diabetes control, antibiotic coating of devices, and antibiotic implementation. Going forward, more studies, especially randomized control trials, need to focus on defining levels of diabetic control (sugar control and A1C control), determining the role of metabolic syndrome in infection promotion and determining laboratory values which could be predictive of infection. We present a discussion of important factors to consider in the realm of PP infections. In addition, we include studies which discuss topics for future directions in decreasing the number of infections seen with PP.

The Anatomical Relationships in the Space of Retzius for Penile Implants: An MRI Analysis

BACKGROUND

The 3-piece inflatable penile prosthesis includes an easy-to-use pump and fluid filled reservoir which is placed in either the space of Retzius (SOR) or in an alternative ectopic location. Reservoir placement in the SOR is a blind procedure despite the SOR being surrounded by many critical structures. To date only a handful of cadaveric studies have described the relevant anatomy.

AIM

To use magnetic resonance imaging (MRI) as an in-vivo model to study relevant retropubic anatomy critical for SOR reservoir placement.

METHODS

The study population included men with elevated prostate specific antigen or biopsy proven prostate cancer who (i) underwent pelvic MRI, (ii) without prior pelvic or inguinal surgery, and (iii) without pelvic radiation therapy. All MRIs were completed with a 3-Tesla scanner and endorectal coil. Both T1 and T2 weighted images were captured in both axial and sagittal planes. All images were reviewed by 2 independent reviewers under the supervision of a dedicated body MRI radiologist. Bladder volume was calculated using an ellipsoid formula.

OUTCOMES

Relevant measurements included (i) the distance between the external inguinal ring (EIR) at the level of the pubic tubercle to the external iliac vein (EIV), (ii) the distance from the EIR at the pubic tubercle to the bladder (accounting for bladder volume) and (iii) the distance from the midline pubic symphysis to the bladder (accounting for bladder volume). Pearson correlation was used to determine correlated measurements.

RESULTS

A total of 24 patients were included. Median participant age was 63 years (interquartile range, 59-66). The mean EIR-EIV distance was 3.0 ± 0.4 cm, the mean EIR-bladder distance was 1.8 ± 1.0 cm and the mean distance from the superior pubic symphysis to bladder was 0.9 ± 0.3 cm. There was a weak correlation between bladder volume and distance between the EIR and bladder (r = -0.30, P = .16).

CLINICAL IMPLICATIONS

The use of MRI as an in-vivo model is a high-fidelity tool to study real time unaltered anatomy and allows for surgical preparation, diagnosis of anatomic variants and acts as a valuable teaching tool.

STRENGTHS & LIMITATIONS

This is the first in-vivo model to report relevant retropubic anatomy in penile implant surgery. Our study is limited by sample size and inclusion of participants with no history of prior pelvic intervention.

CONCLUSION

We demonstrate the utility of MRI as an in-vivo model, as opposed to cadaveric models, for the understanding of relevant retropubic anatomy for implant surgeons. Punjani N, Monteiro L, Sullivan J F et al. The Anatomical Relationships in the Space of Retzius for Penile Implants: An MRI Analysis. J Sex Med 2021;18:1830-1834.

Management of Disastrous Complications of Penile Implant Surgery

RATIONALE

Penile Prosthesis Implantation (PPI) is the definitive treatment for Erectile Dysfunction not responsive to conservative management strategies. Furthermore, it is a staple of surgical treatment of severe Peyronie's Disease (PD) and phallic reconstruction. Expert implantologists occasionally face disastrous complications of penile implant surgery which can prove to be very challenging. In this article we present a selected number of case reports which exemplify this kind of situations and discuss management strategies while also commenting on plausible aetiologies.

PATIENTS' CONCERNS

The first case describes a PPI performed in end-stage fibrotic corpora after multiple instances of implantation/explant. The second and third cases show two diametrically opposed approaches to the management of glans necrosis after PPI in post-radical cystectomy patients. The fourth case describes the history of a diabetic patient suffering from glandular, corporal and urethral necrosis after a complicated PPI procedure. The fifth case reports the surgical treatment of a case of recurring PD due to severe scarring and shrinking of a vascular Dacron patch applied in a previous operation.

DIAGNOSIS

Complication diagnosis in all patient was mainly clinical, intra- and postoperative, with Penile Color Doppler Ultrasonography performed when needed in order to demonstrate penile blood flow.

INTERVENTIONS

The patients underwent complex surgical procedures that addressed each specific complication. Complex penile implants with fibrosis-related complications, penile prosthesis explant with and without surgical debridement of necrotic areas, penile prosthesis explant with necrotic penile shaft and urethral amputation with perineostomy, and complex corporoplasty with scar tissue excision and patch application with PPI were performed in the five patients.

OUTCOMES

Penile anatomy and erectile function with PPI was achieved in 4 out of 5 patients. 1 of 5 patient is scheduled to undergo a total phallic reconstruction procedure at the time of this writing.

LESSONS

Management of disastrous complications of penile implant surgery can be very challenging even in expert hands. In-and-out knowledge of possible PPI and PD complications is required to achieve an acceptable outcome. Bettocchi C, Osmonov D, van Renterghem K, et al. Management of Disastrous Complications of Penile Implant Surgery. J Sex Med 2021;18:1145-1157.

Surgical Outcomes and Patient Satisfaction With the Low-Cost, Semi-Rigid Shah Penile Prosthesis: A boon to the Developing Countries

Introduction

In developing countries most patients with refractory erectile dysfunction cannot afford a penile prosthesis (PP) due to its cost and non-coverage by insurance companies.

Aim

To assess the patient satisfaction outcomes with a novel, low-cost, semi-rigid PP.

Methods

52 patients who had received the Shah semi-rigid PP between January 2013 and December 2018 were included in this bidirectional study. Patient demographics including age, etiology, body mass index, length of PP received and post-operative complications were recorded. Patient satisfaction with the PP was evaluated using the modified Erectile Dysfunction Inventory of Treatment Satisfaction (EDITS) Questionnaire.

Main outcome measures

The primary outcome measures were overall satisfaction, total EDITS and mean EDITS score. The secondary outcome measures were residual penile tumescence, ease of concealment and post-operative complications.

Results

The mean age of the patients was 38.79 years (25–68). Overall satisfaction (EDITS Q-1) of 4 (0–4) was reported by 84.62% (44/52) of patients. There was no significant difference (P > .7) in the total EDITS and overall satisfaction based on various etiological factors. The mean EDITS scores (0–100) were 95.67 ± 10.76, 95.53 ± 8.46 and 91.72 ± 22.42 in 52 patients with BMI <25, 25–29.9 and >30 kg/m2 respectively. During sexual arousal after PP implantation, 26 (50%), 17 (32.7%) and 9 (17.3%) patients noted “good”, “some” or “no” residual penile tumescence respectively. 47 (90.4%), 4 (7.7%) and 1 (1.9%) patients reported “good”, “fair” and “poor” concealment respectively. In the prospective group, major and minor post-operative complications were seen in 10.7% (3/28) and 21.4% (6/28) of patients respectively.

Conclusion

The semi-rigid Shah PP is a safe, effective and affordable option to treat patients with refractory ED. The ability to remove 1 or both sleeves in the Shah PP helps achieve a good fit with a small inventory. Krishnappa P, Tripathi A, Shah R. Surgical Outcomes and Patient Satisfaction With the Low-Cost, Semi-Rigid Shah Penile Prosthesis: A boon to the Developing Countries. Sex Med 2021;9:100399.

Practical Considerations in Inflatable Penile Implant Surgery

BACKGROUND

Penile prosthesis implantation remains an effective solution for men with medical-refractory erectile dysfunction (ED) following radical pelvic surgery. Despite the distortion of pelvic anatomy, a penile implant can be performed with excellent clinical outcomes provided strict patient selection, proper preoperative workup and safe surgical principles are adhered to.

AIM

To provide practical recommendations on inflatable penile prosthesis (IPP) implantation in patients with medical-refractory ED, with an emphasis on patient selection and counselling, preoperative workup as well as surgical considerations to minimize intraoperative complications.

METHODS

A Medline search on relevant English-only articles on penile prostheses and pelvic surgery was undertaken and the following terms were included in the search for articles of interest: "bladder cancer", "prostate cancer", "rectal cancer", "pelvic surgery" and "inflatable penile implant".

OUTCOMES

Clinical key recommendations on patient selection, preoperative workup and surgical principles.

RESULTS

Patients should be made aware of the mechanics of IPP and the informed consent process should outline the benefits and disadvantages of IPP surgery, alternative treatment options, cost, potential prosthetic complications and patient's expectations on clinical outcomes. Specialised diagnostic test for workup for ED is often not necessary although preoperative workup should include screening for active infection and optimising pre-existing medical comorbidities. Precautionary measures should be carried out to minimise infective complication. Corporal dilation and reservoir placement can be challenging in this group, and surgeons may require knowledge of advanced reconstructive surgical techniques when dealing with specific cases such as coexisting Peyronie's disease and continence issue.

CLINICAL TRANSLATION

Strict patient selection and counselling process coupled with safe surgical principles are important to achieve excellent linical outcomes and patient satisfaction rates.

STRENGTHS AND LIMITATIONS

This masterclass paper provides an overview of the practical considerations for men who are undergoing IPP surgery following radical pelvic surgery. Limitations include the lack of highquality data and detailed surgical description on each surgical troubleshooting steps for various prosthetic-related complications.

CONCLUSION

The IPP implantation can be performed efficiently and safely in patients following radical pelvic surgery. Chung E, Mulhall J. Practical Considerations in Inflatable Penile Implant Surgery. J Sex Med 2021;18:1320-1327.

[Survival and associated factors with long-term survival of penile prosthesis]

INTRODUCTION

Implantation of penile prosthesis is constantly growing but little long-term data is available concerning the associated factors of prosthesis survival. Our aim was to describe the long-term survival of penile prostheses and to identify factors influencing long-term prosthesis survival.

METHODS

This is a retrospective, monocentric cohort of patients who underwent their first implantation of a penile prosthesis, between May 2000 and March 2017, at the Reims University Hospital. Prosthesis survival was calculated by the Kaplan-Meier method. A univariate and multivariate analysis to estimate the risk of surgical removal/revision of the prosthesis was performed using a Cox model.

RESULTS

150 patients were included, and 61 patients underwent surgical removal of the prosthesis (40.7%). Mean follow-up was 76.12 months (0-176 months). Prosthesis survival was 69.7% at 5 years (95% CI, 62.2-77.3) and 58.5% at 10 years (95% CI, 50.0-66.9). In multivariate analysis, the factors influencing prosthesis survival were: type of prosthesis (other vs. Coloplast TITAN®, HR 1.89, CI 95%, 1.03-3.45) and prosthesis final length (20-29cm vs. 12-17cm, HR 0.27, 95% CI, 0.09-0.77).

CONCLUSION

At 10 years, the penile prosthesis survival is close to 60%. Type of implant and final length of the prosthesis may have a significant influence in long-term prosthesis survival. Patients undergoing penile prosthesis implantation must be informed about the risk of surgical removal/revision of the prosthesis.

LEVEL OF EVIDENCE

3.

Can malleable penile prosthesis implantation improve voiding dysfunction in men with concurrent erectile dysfunction and buried penis?

Purpose

A buried penis causes voiding dysfunction and limits penetrative sexual intercourse. This pilot study evaluates the urinary outcomes in men with buried penis following insertion of malleable penile implants.

Materials and Methods

Men with buried penis and co-existing urinary problems and erectile dysfunction underwent malleable penile prosthesis implantation were reviewed in a prospective ethics approved database. Patient demographics, flow rate (Qmax), International Prostate Symptom Score (IPSS), Patient Global Impression of Improvement (PGI-I) score, International Index of Erectile Function (IIEF)-5 score, Sexual Encounter Profile (SEP) and overall satisfaction score (on a 5-point scale) were recorded.

Results

A total of 12 men (age 55 to 72 years) were reviewed, and the average gain in penile length post-implant, as measured from the pubis to the tip of the glans penis, was 6.8 (3 to 8) cm. There was a significant improvement in IIEF-5 score (8.2 vs. 22.5; p=0.029) post-implant, and more than half of patients were able to resume normal sexual intercourse and positive SEP-2 and SEP-4 were reported in 9 (75%) and 8 (67%) patients. There were no significant intraoperative or postoperative complication. Significant improvement in Qmax (8.4 ml/s vs. 18.6 ml/s; p=0.042) and IPSS (24.5±5.5 vs 15.5±3.5; p=0.038) were observed. More than two-thirds (83%) reported PGI-I score at 1 or 2, while 9 (75%) patients scored a 5/5 in overall satisfaction rate.

Conclusions

Malleable penile implants increases penile length and improves urinary function in a highly select group of men with a buried penis and erectile dysfunction.

Comparison of penile prosthesis types' complications: A retrospective analysis of single center

OBJECTIVES

The aim of this study was to compare clinical outcomes and complication rates associated with semirigid (malleable) and inflatable penile prostheses (PPs) and investigate the factors that influence these complications.

MATERIAL AND METHODS

The records of 131 patients who had undergone penile prosthesis implantation (PPI) in our clinic due to erectile dysfunction (ED) between January 2010 and March 2019 were retrospectively reviewed. The initial surgery included 116 primary implants and 15 men had two revision operations. Patients were assigned to two groups as semirigid (malleable) PPI (group 1) and inflatable PPI (group 2) patients, and obtained data were compared across these two groups.

RESULTS

Group 1 included 93 patients, while Group 2 included 38 patients. Postoperative complication rates of Group 1 were 8.6% (n = 8), and Group 2 were 21% (n = 8), and the comparison of postoperative complication rates revealed a statistically significant difference between the two groups (p = 0.025). The majority of these complications (50%) was constituted by mechanical failure associated with inflatable PPs. When patients were further segregated as those with and without diabetes type 2 (DM) and those who had and had not undergone radical pelvic surgery (RPS), the comparison of complication rates across these subgroups did not yield any significant difference.

CONCLUSIONS

We determined in this study that semirigid (malleable) PPs were associated with lower complication rates compared to the inflatable group, particularly with regard to mechanic failure, and that DM and history of RPS did not make a difference in complication rates in patients planned to undergo PPI.

An Analysis of a Commercial Database on the Use of Erectile Dysfunction Treatments for Men With Employer-Sponsored Health Insurance

OBJECTIVE

To investigate the annual erectile dysfunction (ED) prevalence among men enrolled in an employer-sponsored health insurance (ESHI) plan and evaluate ED treatment profiles among those with an ED diagnosis.

METHODS

A cross-sectional claims analysis was conducted using the IBM MarketScan Commercial Database, a nationally representative sample of US workers enrolled in ESHI plans. Patients aged 18-64 with at least one ED medical diagnosis claim and continuous enrollment in a given year between 2009 and 2017 were included. Among those with an ED diagnosis, utilization rates of the following ED treatments were determined: phosphodiesterase type 5 inhibitors (PDE5I), penile prosthesis implantation, other ED treatments (eg, vacuum pump, intraurethral suppositories), combination treatment, and no insurer-paid treatments.

RESULTS

Between 2009 and 2017, the annual prevalence of men with ESHI suffering from ED increased by 116%. However, in 2017, only 23% of men with an ED diagnosis received an ED therapy paid for by their ESHI plans. The proportion of men taking PDE5Is ranged from 18% in 2012 to 26% in 2015. The proportion of men with ED undergoing penile prosthesis implantation has declined in recent years (0.23% in 2009 to 0.11% in 2017). Similarly, the rate of men who received other ED treatments or combination treatment has decreased from 2009 to 2017 (0.94%-0.30% and 0.65%-0.19%, respectively).

CONCLUSION

ED prevalence among men insured by an ESHI plan has notably increased, yet approximately three-quarters of these men had no claims for ED treatments, indicating substantial access gaps to treatment.

Erectile dysfunction and cancer: current perspective

Erectile dysfunction (ED) is one of the major but underreported concerns in cancer patients and survivors. It can lead to depression, lack of intimacy between the couple, and impaired quality of life. The causes of erectile dysfunction are psychological distress and endocrinal dysfunction caused by cancer itself or side effect of anticancer treatment like surgery, radiotherapy, chemotherapy and hormonal therapy. The degree of ED depends on age, pre-cancer or pre-treatment potency level, comorbidities, type of cancer and its treatment. Treatment options available for ED are various pharmacotherapies, mechanical devices, penile implants, or reconstructive surgeries. A complete evaluation of sexual functioning should be done prior to starting anticancer therapy. Management should be individualized and couple counseling should be an integral part of the anticancer treatment.

Analysis of satisfaction and surgical outcomes of a major ambulatory surgery program for penile implant

INTRODUCTION AND OBJECTIVE

Penile prosthesis (PP) surgery is performed in many institutions as an inpatient procedure. We have recently initiated a major ambulatory surgery (MAS) program, thus reducing the hospital stay. The objective of this study was to assess the feasibility, complications and satisfaction of the implantation of outpatient surgery PP program in our hospital.

MATERIAL AND METHODS

Retrospective observational study evaluating the results and satisfaction of PP implanted as an outpatient procedure in Bellvitge University Hospital during 2018.

RESULTS

During 2018 we implanted 49 PP: 27 (55%) inpatient surgeries vs. 22 (45%) outpatient surgeries. Of these 22, 2 (9%) were second implants. All patients underwent both general anesthesia and crural, proximal dorsal nerve and transversus abdominis plane block (TAP). Complication rates between inpatient and outpatient procedures were similar, 2 (7%) and 1 (5%), respectively, without reporting infections or requiring PP removal. Postoperatively, a satisfaction telephone survey was conducted in 19 (86%) patients: 16 (84%) considered the time of hospital stay as appropriate, 15 (79%) would have preferred to be operated again in an outpatient care setting and 15 (79%) would recommend it. The patients' main concerns were related to being at home with no medical assistance at home and about coming back the next day for drainage removal. All patients reported well-controlled pain without requiring opioid intake in any case.

CONCLUSIONS

In our series, PP implantation in an ambulatory care setting is feasible and safe. Although there are some aspects that should be improved, the program showed acceptable satisfaction rates and an adequate postoperative pain control, neither raising the administration of opioids, nor increasing complications and re-admission rates.

Long-Term Follow-Up After Penile Prosthesis Implantation-Survival and Quality of Life Outcomes

INTRODUCTION

Hydraulic penile prostheses have shown an overall good mechanical reliability up to 10 years after surgery; however, few data have been published on very long-term follow-up.

AIM

We looked at long-term (≥15 years) complications, including functional and quality of life (QoL) outcomes, after 3-piece inflatable penile prosthesis (IPP) implantation in patients with erectile dysfunction (ED).

METHODS

Data regarding 149 patients submitting to IPP placement before 2001 were analyzed. All patients were implanted with AMS CX and Ultrex Plus 3-piece prostheses.

MAIN OUTCOME MEASURE

Patients were reassessed to evaluate rates of complications and functional outcomes. The validated questionnaire Quality of Life and Sexuality with Penile Prosthesis (QoLSPP) was used to assess patient QoL. Kaplan-Meier analysis estimated the probability of prosthesis survival (defined as working device/not-explanted).

RESULTS

Median follow-up of 51 patients was 206 months (interquartile range [IQR], 145-257). The etiology of ED was vasculogenic (n = 20; 39%), Peyronie's disease (n = 15; 29%), pelvic surgery (n = 4; 7.8%), organic other than vasculogenic (n = 3; 5.9%), or other (n = 9; 18%). Throughout the follow-up, 24 patients (49%) experienced complications: mechanical failure (n = 19; 79%), pain (n = 3; 12%), orgasmic dysfunctions (n = 1; 4.5%), or device infection (n = 1; 4.5%). The estimated IPP survival was 53% (95% CI, 36-67) at 20-year follow-up. Baseline characteristics (age, Charlson comorbidity index, body mass index, and erectile dysfunction etiology) were not significantly associated with the risk of IPP failure over time by Cox regression analysis. At 20-year follow-up, 41% (95% CI, 19-49) of the patients were still using the device. Among them, QoLSPP median domain scores were high: functional 22/25 (IQR, 20-23), relational 17/20 (IQR, 15-18), personal 14/15 (IQR, 12-15), and social 14/15 (IQR, 11-15).

CLINICAL IMPLICATIONS

The longevity of the device and long-term satisfaction rates should be comprehensively discussed during patient consultation for IPP surgery.

STRENGTHS & LIMITATIONS

To our knowledge, this is the first study reporting long-term QoL outcomes using a dedicated questionnaire for penile prostheses. The low response rate for the telephone interviews, the retrospective design of the study, and the relatively small number of patients are the main limitations.

CONCLUSION

Long-term follow-up data after IPP placement showed that almost half of the devices still worked properly 20 years after the original penile implant, as 60% of patients were still using the device with high satisfaction and adequate QoL outcomes. Both patients and physicians should be aware of the expected life and outcomes of IPP implants. Chierigo F, Capogrosso P, Dehò, et al. Long-Term Follow-Up After Penile Prosthesis Implantation-Survival and Quality of Life Outcomes. J Sex Med 2019;16:1827-1833.

A Review of Current and Emerging Therapeutic Options for Erectile Dysfunction

Contemporary treatment algorithms for erectile dysfunction (ED) involve the use of medical therapies such as phosphodiesterase type 5 (PDE5) inhibitors and intracavernosal injection therapy of vasoactive agents, as well as vacuum erection devices and penile prosthesis implants in medically refractory cases. However, the current therapeutic options only address the symptoms of ED and not the underlying pathogenesis that results in ED. Newer and novel ED therapies aspire to reverse ED conditions by preventing cavernosal fibrosis, promoting endothelial revascularization and modulating various neuro-hormonal pathways. Regenerative therapeutic strategies such as low-intensity shock wave, gene and cellular-based therapies, and penile transplants are designed to improve penile hemodynamics and revitalize the cavernosal smooth muscle to mitigate and/or reverse underlying ED. This state-of-art article evaluates current and emerging therapeutic options for ED.

A Retrospective Cohort Study on Surgical Outcomes of Penile Prosthesis Implantation Surgery in Transgender Men After Phalloplasty

OBJECTIVES

To assess surgical outcomes of penile prosthesis implantation in transgender men who underwent phalloplasty.

PATIENTS AND METHODS

Transgender men who underwent penile prosthesis implantation after phalloplasty between January 1989 and September 2018 were retrospectively identified. A chart study was performed recording patient demographics, perioperative complications, and reoperations.

RESULTS

A total of 32 patients were identified: 22 underwent free radial forearm flap, 5 anterolateral thigh, 4 anterolateral thigh/free radial forearm flap, and 1 fibular flap phalloplasty. The median age at prosthesis implantation was 36 (range 21-59) years, the mean BMI 25.9 ± 4.0 kg/m². At first implantation, 16 inflatable (AMS Dynaflex (n = 13), AMS Ambicor (n = 3)) and 16 malleable (Coloplast genesis (n = 14), AMS Spectra (n = 2)) prostheses were placed. Of these, 5 (16%) were removed/replaced because of infection, 2 (6%) because of leakage, 2 because of extrusion, 2 because of dislocation, 2 because of dysfunction, and 1 (3%) because of pain. The postoperative course was completely uneventful in 10 (31.3%) patients. Of all implanted prostheses, including revision procedures (n = 45), 21 (44%) were surgically replaced or removed.

CONCLUSION

Prosthesis explantation, replacement, or revision surgery occurs frequently after penile prosthesis implantation. Patients need to be well-informed preoperatively on these complication rates.

Use of Magnetic Induction to Activate a "Touchless" Shape Memory Alloy Implantable Penile Prosthesis

INTRODUCTION

We describe a novel physiologic penile prosthesis that uses shape memory alloy properties to mimic the transition between a flaccid and erect penis using magnetic induction instead of hydraulic pressure.

AIM

To evaluate the parameters of magnetic induction to activate a shape memory alloy implantable penile prosthesis.

METHODS

We prototyped an implantable penile prosthesis cylinder using temperature-tuned nickel titanium alloy tubes laser cut to specifications. The device was then tested implanted in an animal tissue model and in cadaveric tissue. Testing consisted of placing the device deactivated in its more malleable and compressed state, then activating it using an external inducer wand while measuring temperature changes that occur on the surface of the device, within the tissue, and at the skin surface.

MAIN OUTCOME MEASURES

Our main outcome measures were the efficiency of activation and thermal safety of this approach.

RESULTS

Using a handheld magnetic inductor, we were able to successfully activate the SMA penile prosthesis with no direct contact under 45 seconds. This handheld wand produced a magnetic field that penetrated tissue and caused the appropriate phase change within the prosthesis. Tissue temperature (middle and surface probes) in the animal tissue model increased only a few degrees Celsius during the activation process, and never exceeded 28 degrees Celsius from a baseline at room temperature ∼ 25 degrees Celsius. We encountered similar results without a notable change in tissue temperature in the cadaveric tests. The fully activated device resisted buckling forces of 2.66 kgf ± 0.045.

CLINICAL IMPLICATIONS

This non-hydraulic shape memory prosthesis obviates the needs for reservoirs and pumps, and the wand-based interaction with the device may be easier to use.

STRENGTH & LIMITATIONS

This technology represents a fundamental departure from the hydraulic-based penile prosthesis and has comparable mechanical properties as current-marked devices. It appears to show thermal safety in controlled environments, however real-world use would need further studies. Further optimization of prototypes needs to be done prior to human clinical trials.

CONCLUSION

A shape memory penile prosthesis is a promising alternative to hydraulic-based penile prostheses and can be activated safely and efficiently using magnetic induction in our models of the human penis. Le BV, McVary KT, McKenna K, et al. Use of Magnetic Induction to Activate a "Touchless" Shape Memory Alloy Implantable Penile Prosthesis. J Sex Med 2019;16:596-601.

Trends in penile prosthesis implantation and analysis of predictive factors for removal

PURPOSE

This study aims to analyze patient demographics, hospital characteristics, and clinical risk factors which predict penile prosthesis removal. We also examine costs of penile prosthesis removal and trends in inflatable versus non-inflatable penile prostheses implantation in the USA from 2003 to 2015.

METHODS

Cross-sectional analysis from Premier Perspective Database was completed using data from 2003 to 2015. We compared the relative proportion of inflatable versus non-inflatable penile prostheses implanted. We separated the prosthesis removal group based on indication for removal-Group 1 (infection), Group 2 (mechanical complication), and Group 3 (all explants). All groups were compared to a control group of patients with penile implants who were never subsequently explanted. Multivariate analysis was performed to analyze patient and hospital factors which predicted removal. Cost comparison was performed between the explant groups.

RESULTS

There were 5085 penile prostheses implanted with a stable relative proportion of inflatable versus non-inflatable prosthesis over the 13-year study period. There were 3317 explantations. Patient factors associated with prosthesis removal were non-black race, Charlson Comorbidity Index, diabetes, and HIV status. Hospital factors associated with removal included non-teaching status, hospital region, year of removal, and annual surgeon volume. Median hospitalization costs of all explantations were $10,878. Explantations due to infection cost $11,252 versus $8602 for mechanical complications.

CONCLUSIONS

This large population-based study demonstrates a stable trend in inflatable versus non-inflatable prosthesis implantation. We also identify patient and hospital factors that predict penile prosthesis removal which has clinical utility for patient risk stratification and counseling.

Infection Retardant Coatings Impact on Bacterial Presence in Penile Prosthesis Surgery: A Multicenter Study

OBJECTIVE

To investigate patients for positive culture rates with or without infection retardant coatings (IRC) penile prostheses (PPs) and to examine changes in culture positive isolates found in patients presenting overt clinical infection.

METHODS

Cultures were obtained from PPs immediately upon surgical exposure of the pump. 236 patients were broken down into 2 groups, with each further divided into 2 groups. The noninfected group included 208 patients: 133 with uncoated PPs and 75 with IRC implants. The infected group included 28 patients: 16 with uncoated PP and 12 with IRC inflatable penile prostheses (IPP). Additionally, sensitivity to the combination of tetracycline and rifampin were evaluated on all cultures.

RESULTS

In the noninfected group, culture positive isolates were found in 85 patients with uncoated PP's and in 32 patients with IRC implants [P value = 0.0003]. Cultures positive for Staphylococcus genus were found in 75 uncoated PP patients, while 20 patients with IRC implants had an isolate of this genus. In the infected group, culture positive isolates were found in 7 patients with uncoated PP and 6 patients with IRC IPPs [P value = 1.000]. Positive cultures for Staphylococcus genus were found in 6 patients with uncoated PP, while 3 patients with IRC IPP had an isolate of this genus. All bacterial isolates were sensitive to the combination of tetracycline and rifampin.

CONCLUSION

Positive bacterial cultures have been shown to be present on clinically uninfected IPPs at time of revision surgery. Culture isolates grown from patients with IRC IPPs reveal a nontraditional bacterial profile: fewer cultured isolates of Staphylococcus genus.

Interventions to Address Sexual Problems in People With Cancer: American Society of Clinical Oncology Clinical Practice Guideline Adaptation of Cancer Care Ontario Guideline

Purpose

The adaptation of the Cancer Care Ontario (CCO) guideline Interventions to Address Sexual Problems in People With Cancer provides recommendations to manage sexual function adverse effects that occur as a result of cancer diagnosis and/or treatment.

Methods

ASCO staff reviewed the guideline for developmental rigor and updated the literature search. An ASCO Expert Panel ( Table A1 ) was assembled to review the guideline content and recommendations.

Results

The ASCO Expert Panel determined that the recommendations from the 2016 CCO guideline are clear, thorough, and based upon the most relevant scientific evidence. ASCO statements and modifications were added to adapt the CCO guideline for a broader audience.

Recommendations

It is recommended that there be a discussion with the patient, initiated by a member of the health care team, regarding sexual health and dysfunction resulting from cancer or its treatment. Psychosocial and/or psychosexual counseling should be offered to all patients with cancer, aiming to improve sexual response, body image, intimacy and relationship issues, and overall sexual functioning and satisfaction. Medical and treatable contributing factors should be identified and addressed first. In women with symptoms of vaginal and/or vulvar atrophy, lubricants in addition to vaginal moisturizers may be tried as a first option. Low-dose vaginal estrogen, lidocaine, and dehydroepiandrosterone may also be considered in some cases. In men, medication such as phosphodiesterase type 5 inhibitors may be beneficial, and surgery remains an option for those with symptoms or treatment complications refractory to medical management. Both women and men experiencing vasomotor symptoms should be offered interventions for symptomatic improvement, including behavioral options such as cognitive behavioral therapy, slow breathing and hypnosis, and medications such as venlafaxine and gabapentin.Additional information is available at: www.asco.org/survivorship-guidelines and www.asco.org/guidelineswiki .

Role of Penile Prosthesis in Priapism: A Review

Ischemic priapism is a urological emergency that has been associated with long-standing and irreversible adverse effects on erectile function. Studies have demonstrated a linear relationship between the duration of critically ischemic episodes and the subsequent development of corporal fibrosis and irreversible erectile function loss. Placement of a penile prosthesis is a well-established therapeutic option for the management of erectile dysfunction secondary to ischemic priapism, and will be the focus of this review. Review of the current literature demonstrates a growing utilization of penile prostheses in the treatment of erectile dysfunction secondary to ischemic priapism. Unfortunately, there is a paucity of randomized-controlled trials describing the use of prosthesis in ischemic priapism. As a result, there is a lack of consensus regarding the type of prosthesis (malleable vs. inflatable), timing of surgery (acute vs. delayed), and anticipated complications for each approach. Both types of prostheses yielded comparable complication rates, but the inflatable penile prosthesis have higher satisfaction rates. Acute treatment of priapism was associated with increased risk of prosthetic infection, and could potentially cause psychological trauma, whereas delayed implantation was associated with greater corporal fibrosis, loss of penile length, and increased technical difficulty of implantation. The paucity of high-level evidence fuels the ongoing discussion of optimal use and timing of penile prosthesis implantation. Current guidance is based on consensus expert opinion derived from small, retrospective studies. Until more robust data is available, a patient-centered approach and joint decision-making between the patient and his urologist is recommended.

Construction of engineered corpus cavernosum with primary mesenchymal stem cells in vitro

Various methods have been used to reconstruct the penis. The objective of this study was to investigate the feasibility of constructing engineered corpus cavernosum with primary mesenchymal stem cells (MSCs) in a rabbit model in vitro. Acellular corporal matrices (ACMs) were obtained from adult rabbit penile tissues through an established decellularization procedure. MSCs were separated, purified, and then seeded on ACMs to construct engineered corpus cavernosum. The seeded ACMs were subsequently cultured in an incubator for 14 days. Histological analyses showed that MSCs seeded on the ACMs had proliferated and were well distributed. Detection of CD31, vWF, smooth muscle actin (SMA), and myosin protein as well as vWF and myosin mRNA revealed that the MSCs had differentiated into endothelial cells and smooth muscle cells. In addition, cell morphology of the engineered corpus cavernosum was directly observed by transmission electron microscopy. This study demonstrated that engineered corpus cavernosum could be successfully constructed using primary MSCs in vitro. This technology represents another step towards developing engineered corpus cavernosum in vitro.