Factors Determining Functional Outcomes After Radical Prostatectomy: Robot-Assisted Versus Retropubic

Recovery of Social Continence and Sexual Function in Men With High-risk Prostate Cancer After Radical Prostatectomy: Results From a Statewide Collaborative

OBJECTIVES

To examine post-operative urinary and sexual functional outcomes for men with high-risk prostate cancer (HRPCa) who underwent radical prostatectomy (RP) within the Michigan Urological Surgery Improvement Collaborative (MUSIC).

METHODS

We identified patients who underwent RP for HRPCa in MUSIC between 2014 and 2023. HRPCa was defined according to American Urological Association criteria. Patients completed Expanded Prostate Cancer Index Composite (EPIC-26) pre-RP and 3-, 6-, 12-, and 24-months postoperatively. Primary outcomes included social continence, defined as 0-1 pads used daily; and recovery of sexual function, defined as the ability to achieve erections firm enough for intercourse. Multivariable and bivariate analyses were performed to identify factors associated with recovery of social continence and sexual function.

RESULTS

Around 1323 patients were included in the post-RP urinary continence analysis and 422 men in the sexual function analysis. Fifty-eight percent and 86% of patients achieved social continence at 3- and 12-months post-RP, respectively. Continence recovery was associated with higher baseline EPIC-26 urinary continence scores (OR 1.10, per 5 points, 95% CI 1.06-1.15, P <.001), and negatively associated with increasing age (OR 0.78 per 5-year increase, 95% CI 0.71-0.85 P <.001). Fifteen percent of patients had recovery of sexual function at 12-month post-RP. On bivariate analysis, recovery of sexual function was associated with nerve-sparing at time of RP, lower pre-operative PSA, and not receiving post-RP ADT/RT.

CONCLUSION

RP for HRPCa has acceptable rates of postoperative social continence. However, post-RP recovery of sexual function remains a challenge. This information has important implications for pre-operative counseling and post-operative follow-up for patients with HRPCa.

Functional Outcomes and Quality of Life in High-risk Prostate Cancer Patients Treated by Robot-assisted Radical Prostatectomy with or Without Adjuvant Treatments

BACKGROUND

Robot-assisted laparoscopic prostatectomy (RALP) is used frequently to treat prostate cancer; yet, prospective data on the quality of life and functional outcomes are lacking.

OBJECTIVE

To assess the quality of life and functional outcomes after radical prostatectomy in different risk groups with or without adjuvant treatments.

DESIGN, SETTING, AND PARTICIPANTS

The Be-RALP database is a prospective multicentre database that covers 9235 RALP cases from 2009 until 2016. Of these 9235 patients, 2336 high-risk prostate cancer patients were matched with low/intermediate-risk prostate cancer patients.

INTERVENTION

Patients were treated with RALP only or followed by radiotherapy and/or hormone treatment.

OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS

We used a mixed-model analysis to longitudinally analyse quality of life, urinary function, and erectile function between risk groups with or without additional treatments.

RESULTS AND LIMITATIONS

Risk group was not significant in predicting quality of life, erectile function, or urinary function after RALP. Postoperative treatment (hormone and/or radiotherapy treatment) was significant in predicting International Index of Erectile Function (IIEF-5), sexual activity, and sexual functioning.

CONCLUSIONS

Risk group was not linked with clinically relevant declines in functional outcomes after RALP. The observed functional outcomes and quality of life are in favour of considering RALP for high-risk prostate cancer. Postoperative treatment resulted in lower erectile function measures without clinically relevant changes in quality of life and urinary functions. Hormone therapy seems to have the most prominent negative effects on these outcomes.

PATIENT SUMMARY

This study investigated the quality of life, and urinary and erectile function in patients with aggressive and less aggressive prostate cancer after surgery only or in combination with hormones or radiation. We found that quality of life recovers completely, while erectile and urinary function recovers only partially after surgery. Aggressiveness of the disease had a minimal effect on the outcomes; yet, postoperative treatments lowered erectile function further.

Membranous urethral length measurement on preoperative MRI to predict incontinence after radical prostatectomy: a literature review towards a proposal for measurement standardization

OBJECTIVES

To investigate the membranous urethral length (MUL) measurement and its interobserver agreement, and propose literature-based recommendations to standardize MUL measurement for increasing interobserver agreement. MUL measurements based on prostate MRI scans, for urinary incontinence risk assessment before radical prostatectomy (RP), may influence treatment decision-making in men with localised prostate cancer. Before implementation in clinical practise, MRI-based MUL measurements need standardization to improve observer agreement.

METHODS

Online libraries were searched up to August 5, 2022, on MUL measurements. Two reviewers performed article selection and critical appraisal. Papers reporting on preoperative MUL measurements and urinary continence correlation were selected. Extracted information included measuring procedures, MRI sequences, population mean/median values, and observer agreement.

RESULTS

Fifty papers were included. Studies that specified the MRI sequence used T2-weighted images and used either coronal images (n = 13), sagittal images (n = 18), or both (n = 12) for MUL measurements. 'Prostatic apex' was the most common description of the proximal membranous urethra landmark and 'level/entry of the urethra into the penile bulb' was the most common description of the distal landmark. Population mean (median) MUL value range was 10.4-17.1 mm (7.3-17.3 mm), suggesting either population or measurement differences. Detailed measurement technique descriptions for reproducibility were lacking. Recommendations on MRI-based MUL measurement were formulated by using anatomical landmarks and detailed descriptions and illustrations.

CONCLUSIONS

In order to improve on measurement variability, a literature-based measuring method of the MUL was proposed, supported by several illustrative case studies, in an attempt to standardize MRI-based MUL measurements for appropriate urinary incontinence risk preoperatively.

CLINICAL RELEVANCE STATEMENT

Implementation of MUL measurements into clinical practise for personalized post-prostatectomy continence prediction is hampered by lack of standardization and suboptimal interobserver agreement. Our proposed standardized MUL measurement aims to facilitate standardization and to improve the interobserver agreement.

KEY POINTS

• Variable approaches for membranous urethral length measurement are being used, without detailed description and with substantial differences in length of the membranous urethra, hampering standardization. • Limited interobserver agreement for membranous urethral length measurement was observed in several studies, while preoperative incontinence risk assessment necessitates high interobserver agreement. • Literature-based recommendations are proposed to standardize MRI-based membranous urethral length measurement for increasing interobserver agreement and improving preoperative incontinence risk assessment, using anatomical landmarks on sagittal T2-weighted images.

An artificial intelligence method for predicting postoperative urinary incontinence based on multiple anatomic parameters of MRI

Background

Deep learning methods are increasingly applied in the medical field; however, their lack of interpretability remains a challenge. Captum is a tool that can be used to interpret neural network models by computing feature importance weights. Although Captum is an interpretable model, it is rarely used to study medical problems, and there is a scarcity of data regarding MRI anatomical measurements for patients with prostate cancer after undergoing Robotic-Assisted Radical Prostatectomy (RARP). Consequently, predictive models for continence that use multiple types of anatomical MRI measurements are limited.

Methods

We explored the energy efficiency of deep learning models for predicting continence by analyzing MRI measurements. We analyzed and compared various statistical models and provided reference examples for the clinical application of interpretable deep-learning models. Patients who underwent RARP at our institution between July 2019 and December 2020 were included in this study. A series of clinical MRI anatomical measurements from these patients was used to discover continence features, and their impact on continence was primarily evaluated using a series of statistical methods and computational models.

Results

Age and six other anatomical measurements were identified as the top seven features of continence by the proposed model UINet7 with an accuracy of 0.97, and the first four of these features were also found by primary statistical analysis.

Conclusions

This study fills the gaps in the in-depth investigation of continence features after RARP due to the limitations of clinical data and applicable models. We provide a pioneering example of the application of deep-learning models to clinical problems. The interpretability analysis of deep learning models has the potential for clinical applications.

Efficacy of Laparoscopic Iliopubic Tract Repair Plus Transabdominal Preperitoneal Hernioplasty for Treating Inguinal Hernia After Robot-assisted Radical Prostatectomy

BACKGROUND

Robot-assisted radical prostatectomy (RARP) is a risk factor for inguinal hernia (IH). Furthermore, in patients who have undergone RARP, the fibrotic scar tissue in the RARP area limits preperitoneal dissection. This study aimed to evaluate the efficacy of performing laparoscopic iliopubic tract repair (IPTR) in addition to transabdominal preperitoneal hernioplasty (TAPPH) to treat IH after RARP.

PATIENTS AND METHODS

A total of 80 patients with an IH after RARP were treated with TAPPH from January 2013 to October 2020 and were included in this retrospective study. Patients who underwent conventional TAPPH were categorized as the TAPPH group (25 patients with 29 hernias), whereas those who underwent TAPPH with IPTR were categorized as the TAPPH + IPTR group (55 patients with 63 hernias). The IPTR comprised suture fixation of the transversus abdominis aponeurotic arch to the iliopubic tract.

RESULTS

All patients had indirect IH. The incidence of intraoperative complications was significantly higher in the TAPPH group than in the TAPPH + IPTR group [13.8% (4/29) vs 0.0% (0/63), P = 0.011]. The average operative time was also significantly shorter in the TAPPH + IPTR group than in the TAPPH group ( P < 0.001). There were no differences between the two groups in the duration of hospitalization, recurrence rate, and pain severity.

CONCLUSIONS

The addition of laparoscopic IPTR to TAPPH for treating IH after RARP is safe and is associated with a minimal risk of intraoperative complications and a short operative time.

Erectile function, urinary continence and oncologic outcomes of neurovascular bundle sparing robot-assisted radical prostatectomy for high-risk prostate cancer: A systematic review and meta-analysis

Background

The nerve-sparing (NS) effect of robot-assisted radical prostatectomy (RARP) on patients with a high-risk prostate cancer remains unclear. The objective of this study was to compare the urinary continence, erectile function and oncology outcomes of the nerve-sparing and non-nerve-sparing (NNS) group during RARP surgeries.

Methods

We systematically searched databases including PubMed, Embase, Cochrane Library and Web of Science to identify relevant studies published in English up to December 2022. Newcastle-Ottawa Scale (NOS) was used as a quality evaluation tool to evaluate the quality of the literature parameters involved, including urinary continence, erectile function and oncologic outcomes, which were compared using the Stata 15.1 software (StataSE, USA).

Results

A total of 8 cohort studies involving 2499 patients were included. A meta-analysis of results showed that the NS group was beneficial to the recovery of urinary continence (RR 0.46, 95%CI 0.22, 0.96; p=0.045&lt;0.05) and erectile function (RR 0.32, 95%CI 0.16, 0.63; p=0.001&lt;0.05) 12 months after surgeries, which showed a better oncological outcome (RR 1.31, 95%CI 1.01, 1.69; p=0.01&lt;0.05).

Conclusions

The current study results indicate that intraoperative NS during RARP is beneficial to long-term postoperative functional recovery and tumor prognosis of patients with high-risk prostate cancers. Due to interstudy interferences, the results should be interpreted with caution.

Systematic review registration

https://www.crd.york.ac.uk/PROSPERO/, identifier: CRD42022384647.

Erectile Dysfunction in Pelvic Cancer Survivors and Current Management Options

Pelvic malignancies, including prostate, rectal, and bladder cancers, are among the most frequent malignancies found in the male population. These issues are most effectively and commonly treated with radiotherapy and/or surgery. However, these treatments can cause collateral damage, resulting in significant impacts on quality of life, with erectile dysfunction being one of the most frequent postoperative complications. Currently, there are several treatment options for erectile dysfunction, including oral phosphodiesterase type 5 inhibitors, vacuum erection devices, intracorporeal injections, and penile prosthesis. The latter has shown to be an effective and safe technique, with results comparable to those obtained by patients without pelvic surgery or radiotherapy. The results of early penile rehabilitation programs are promising and they have been incorporated into a greater proportion of treatment plans more recently, with varying degrees of success. In this narrative review, we summarize the literature on erectile dysfunction after pelvic cancer treatments and its management.

A Matched-Pair Analysis after Robotic and Retropubic Radical Prostatectomy: A New Definition of Continence and the Impact of Different Surgical Techniques

Background: Radical prostatectomy is considered the gold-standard treatment for patients with localized prostate cancer. The literature suggests there is no difference in oncological and functional outcomes between robotic-assisted radical prostatectomy (RARP) and open (RRP). (2) Methods: The aim of this study was to compare continence recovery rates after RARP and RRP measured with 24 h pad weights and the International Consultation on Incontinence Questionnaire—Short Form (ICIQ-SF). After matching the population (1:1), 482 met the inclusion criteria, 241 patients per group. Continent patients with a 24 h pad test showing <20 g of urinary leakage were considered, despite severe incontinence, and categorized as having >200 g of urinary leakage. (3) Results: There was no difference between preoperative data. As for urinary continence (UC) and incontinence (UI) rates, RARP performed significantly better than RRP based on objective and subjective results at all evaluations. Univariable and multivariable Cox Regression Analysis pointed out that the only significant predictors of continence rates were the bilateral nerve sparing technique (1.25 (CI 1.02,1.54), p = 0.03) and the robotic surgical approach (1.42 (CI 1.18,1.69) p ≤ 0.001). (4) Conclusions: The literature reports different incidences of UC depending on assessment and definition of continence “without pads” or “social continence” based on number of used pads per day. In this, our first evaluation, the advantage of objective measurement through the weight of the 24 h and subjective measurement with the ICIQ-SF questionnaire best demonstrates the difference between the two surgical techniques by enhancing the use of robotic surgery over traditional surgery.

Value of Different Magnetic Resonance Imaging-based Measurements of Anatomical Structures on Preoperative Prostate Imaging in Predicting Urinary Continence After Radical Prostatectomy in Men with Prostate Cancer: A Systematic Review and Meta-analysis

CONTEXT

Measurements of anatomical structures on preoperative prostate magnetic resonance imaging (MRI) are used in risk models for treatment decisions to predict urinary continence (UC) following radical prostatectomy (RP). However, the association between these parameters and UC is unclear.

OBJECTIVE

To systematically summarize the literature on prognostic preoperative prostate MRI measurements of (peri)prostatic structures in relation to time to recovery of postoperative UC in men with prostate cancer.

EVIDENCE ACQUISITION

Online libraries were searched up to August 27, 2021. Article selection and critical appraisal were performed by two reviewers. All papers reporting on preoperative MRI measurements with UC correlation in univariable or multivariable analyses were included.

EVIDENCE SYNTHESIS

In the 50 studies included (mostly retrospective), 57 MRI parameters were evaluated. The pooled analyses showed that greater membranous urethra length (MUL) was prognostic for regaining UC at 1 mo (odds ratio [OR] 1.15, 95% confidence interval [CI] 1.10-1.21), 3 mo (OR 1.23, 95% CI 1.16-1.31), 6 mo (OR 1.16, 95% CI 1.08-1.25), and 12 mo (OR 1.19, 95% CI 1.10-1.29). Several other anatomical structures showed at least in one study a significant correlation with later return to UC: four prostate-related parameters (greater depth, apical protrusion, larger intravesical protrusion, small dorsal vascular complex), five urethra-related parameters (thicker wall, severe fibrosis, smaller volume, larger preoperative angle between the prostate axis and membranous urethra, shorter minimal residual MUL), and six musculoskeletal-related parameters (lower perfusion ratio, thinner levator ani muscle, larger inner or outer levator distance, shorter pelvic diaphragm length, and larger midpelvic area).

CONCLUSIONS

Greater MUL as measured on preoperative MRI was an independent prognostic factor for return to UC within 1 mo after RP and remained prognostic at 12 mo. Other anatomical structures may potentially be predictive, but these would need to be substantiated in prospective trials before being adopted in postoperative UC risk models for treatment decisions in men with prostate cancer.

PATIENT SUMMARY

We summarized study data on the relation between measurements of anatomical structures on preoperative magnetic resonance imaging scans and urinary continence after removal of the prostate. Greater length of one part of the urethra (membranous urethra) is associated with faster return to continence. Other anatomical structures have potential for predicting postoperative continence, but need further investigation.

Sugammadex versus neostigmine on postoperative pulmonary complications after robot-assisted laparoscopic prostatectomy: a propensity score-matched analysis

PURPOSE

Robot-assisted laparoscopic prostatectomy (RALP) requires particular surgical conditions, such as carbon dioxide pneumoperitoneum and steep Trendelenburg positioning, which may have adverse effects on the respiratory system. The effect of sugammadex on postoperative pulmonary complications (PPCs) is controversial. Therefore, we evaluated the incidence of PPCs according to the type of neuromuscular blockade reversal agents in RALP.

METHODS

We retrospectively analyzed RALP patients. We compared the incidence of PPCs between patients receiving neostigmine (neostigmine group) and those receiving sugammadex (sugammadex group) as a neuromuscular blockade reversal agent. Propensity score-matched analysis was performed. Other postoperative outcomes, such as duration of hospital stays, major adverse cardiac events during hospital stays, and death during hospital stays, were also compared between the two groups.

RESULTS

The incidence of PPCs was 28.9% (137/474) in RALP. The incidence of PPCs was significantly lower in the sugammadex group than in the neostigmine group (18.6% [44/237] vs. 39.2% [93/237], p < 0.001). The incidence of atelectasis was significantly lower in the sugammadex group than in the neostigmine group (18.6% vs. 39.2%, p < 0.001). The incidence of pneumonia was not significantly different between the sugammadex and neostigmine groups after RALP (0.0% vs. 0.4%, p > 0.999). Besides these, other postoperative outcomes were not significantly different between the two groups.

CONCLUSIONS

The incidence of PPCs after RALP was significantly lower in patients receiving sugammadex than in those receiving neostigmine. These results can provide useful information on the appropriate selection of neuromuscular blockade reversal agents in RALP.

New Evolution of Robotic Radical Prostatectomy: A Single Center Experience with PERUSIA Technique

Radical prostatectomy (RP) is the standard surgical treatment of organ-confined prostate cancer in patients with a life expectancy of at least 10 years. In a recent prospective study, we described the PERUSIA (Posterior, Extraperitoneal, Robotic, Under Santorini, Intrafascial, Anterograde) technique, which is an extraperitoneal full nerve sparing robotic RP, showing its feasibility and safety. The aim of this retrospective study was to evaluate the peri-operative, oncologic, and functional outcomes of the PERUSIA technique. We retrospectively analyzed the data of 454 robotic-assisted radical prostatectomies (RARP) performed using the PERUSIA technique from January 2012 to October 2019. We evaluated perioperative outcomes (operative time, estimated blood loss, catheterization time, complication rate, length of stay), oncological (positive surgical margins and biochemical recurrence), and functional outcomes in terms of urinary continence and sexual potency. The overall complication rate was 16%, positive surgical margins were 8.1%, and biochemical recurrence occurred in 8.6% at median follow-up of 47 months. Urinary continence was achieved in 69% of cases the day after the removal of the catheter, in 92% at 3 months, and in 97% at 12 months after surgery. The average rate of sexual potency was 72% and 82% respectively 3 and 12 months after surgery. Our findings show that the PERUSIA technique is a safe extraperitoneal approach to perform a full nerve sparing technique providing exciting functional outcomes.

Cost-effectiveness analysis of robotic-assisted versus retropubic radical prostatectomy: a single cancer center experience

Prostate cancer (PCa) treatment has been greatly impacted by the robotic surgery. The economics literature about PCa is scarce. We aim to carry-out cost-effectiveness and cost-utility analyses of the robotic-assisted radical prostatectomy (RALP) using the "time-driven activity-based cost" methodology. Patients who underwent radical prostatectomy in 2013 were retrospectively analyzed in a cancer center over a 5-year period. Fifty-six patients underwent RALP and 149 patients underwent retropubic radical prostatectomy (RRP). The amounts were subject to a 5% discount as correction of monetary value considering time elapsed. Calculation of the Incremental Cost-Effectiveness Ratios (ICER) related to events avoided and the Incremental Cost-Utility Ratio (ICUR) related to "QALY saved" were performed. QALY was performed using values of utility and "disutility" weights from the "Cost-Effectiveness Analysis Registry". Hypothetical cohorts were simulated with 1000 patients in each group, based on the treatment outcomes. Total and average costs were R$1,903,671.93, and R$12,776.32 for the RRP group, and R$1,373,987.26, and R$24,535.49 for the RALP group, respectively. The costs to treat the hypothetical cohorts were R$10,010,582.35 for RRP, and R$19,224,195.90 for RALP. ICER calculation evidenced R$9,213,613.55 of difference between groups. ICUR was R$ 22,690.83 per QALY saved. Limitations were the lack of cost-effectiveness analyses related to re-hospitalization rates and complications, single center perspective, and currency-translation differences. Medical fees were not included. RALP showed advantages in cost-effectiveness and cost-utility over RRP in the long term. Despite the increased costs to the introduction of robotic technology, its adoption should be encouraged due to the gains.

Quantifying the "Assistant Effect" in Robotic-Assisted Radical Prostatectomy (RARP): Measures of Technical Performance

PURPOSE

Surgeons are reliant on the bedside assistant during robotic surgeries. Using a modified global rating scale (GRS), we aim to assess the association between an assistant's technical skill on surgeon performance in Robotic-Assisted Radical Prostatectomy (RARP).

METHODS

Prospective, intraoperative video from RARP cases at three centers were collected. Baseline demographic and RARP-experience data were collected from participating surgeons and trainees. The dissection of the prostatic pedicle and neurovascular bundle step (NVB) was analyzed. Expert analysts scored the console surgeon performance using the Global Evaluative Assessment of Robotic Skills (GEARS), and the bedside assistant performance using a modified Objective Structured Assessment of Technical Skills (aOSATS). The primary outcome is the association between console surgeon performance, as measured by GEARS, and assistant skill, as measured by aOSATS. Spearman's rho correlations were used to test the relationship between assistant and surgeon technical performance, and a multivariable linear regression model was created to test this association while controlling for patient factors.

RESULTS

92 RARP cases were available for the analysis, comprising 14 console surgeons and 22 different bedside assistants. In only 5 (5.4%) cases, the neurovascular bundle step was completed by a trainee, and in 13 (14.1%) of cases, a staff-level surgeon acted as the bedside assistant. aOSATS score was significantly associated with robotic console experience (P = 0.011), and prior laparoscopic experience (P < 0.001). Assistant aOSATS score showed a weak but significant correlation with surgeon GEARS score during the neurovascular bundle step (spearman's rho = 0.248, P = 0.028). On linear regression, aOSATS remained a significant predictor of console surgeon performance (P = 0.016), after controlling for patient age and BMI, prostate volume, tumor stage, and presence of nerve-sparing.

CONCLUSIONS

This is the first study to assess the association between assistant technical skill and surgeon performance in RARP. Additionally, we have provided validity evidence for a modified OSATS global rating scale for training and assessing bedside assistant performance.

Integrity of the Urethral Sphincter Complex, Nerve-sparing, and Long-term Continence Status after Robotic-assisted Radical Prostatectomy

BACKGROUND

The applicability of the sphincter complex integral theory to robotic-assisted radical prostatectomy (RARP) is unclear, with little known about the long-term effect of sphincter complex integrity on continence.

OBJECTIVE

To determine whether the preoperative anatomical and functional features of the sphincter complex and the degree of nerve-sparing affect long-term continence after RARP.

DESIGN, SETTING, AND PARTICIPANTS

Prospective study of 529 patients who underwent RARP at a single tertiary center.

OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS

Anatomical factors, including membranous urethral length (MUL) and pelvic diaphragm length (PDL), were assessed using sagittal views of preoperative magnetic resonance imaging. MUL was defined as the distance from the posterior prostate apex to the urethra level at the penile bulb, and PDL was defined as the length of the urethra that met the planes created by the pelvic floor muscles. Functional parameters including maximum urethral closure pressure (MUCP) and functional urethral length were evaluated using preoperative measurements of the urethral pressure profiles. The degree of nerve-sparing was stratified as bilateral, unilateral, or none. Continence (pad-free status) was assessed according to anatomical and functional factors and nerve-sparing. We used binary logistic regression to assess factors predicting continence return 12 mo after RARP.

RESULTS AND LIMITATIONS

Continence return rates 1, 3, 6, and 12 mo after RARP were 39.7%, 66.0%, 80.2%, and 87.0%, respectively. Continence return rates at 12 mo differed significantly in patients with MUL ≥11.7mm (91.9%) and <11.7mm (79.9%), PDL ≥9.9mm (96.7%) and <9.9mm (74.5%), and MUCP ≥66 cmH₂O (89.7%) and <66 cmH₂O (79.4%). The continence return rate was significantly higher in patients with bilateral (93.0%) than in patients with unilateral (78.1%) or no (76.7%) nerve-sparing. Multivariate analysis showed that PDL (odds ratio [OR]=2.187 per mm), MUCP (OR=1.037 per cmH₂O), and bilateral nerve-sparing (OR=3.671) were independently associated with continence return 12 mo after RALP.

CONCLUSIONS

The anatomical length and static pressure of the sphincter complex affected continence after RARP. Bilateral nerve-sparing was independently associated with long-term continence.

PATIENT SUMMARY

Predisposing length and static pressure of the urinary sphincter affect continence after robotic-assisted radical prostatectomy. Nerve bundle preservation during surgery enhances postoperative return of continence.

Prevalence of post-prostatectomy erectile dysfunction and a review of the recommended therapeutic modalities

Radical prostatectomy (RP) represents one of the most commonly used first-line treatment modalities in men with localized prostate cancer. One of the most feared post-surgical complications is erectile dysfunction (ED), usually caused by direct damage to the cavernous nerves or due to neuropraxia. Penile rehabilitation is an emerging concept that was proposed to stimulate and accelerate recovery of erectile function after RP. The goal is to improve blood flow to the penis, increasing cavernous oxygenation and avoiding fibrosis. The most common used modalities include oral phosphodiesterase type 5 inhibitors (PDE5-I), vacuum erection devices (VEDs), intracorporeal injection (ICI) therapy, medicated urethral system for erections (MUSE), and a combination of these treatments. For those patients with severe ED, ED refractory to medical therapy and/or seeking long term reliable results, the penile prosthesis implant remains an excellent alternative. We conducted a broad review of post-prostatectomy ED prevalence with different techniques and the success rates of the different therapeutic approaches.

[IMPACT OF MEMBRANOUS URETHRAL LENGTH IN DE NOVO STRESS URINARY INCONTINENCE FOLLOWING HOLMIUM LASER ENUCLEATION OF THE PROSTATE]

(Purpose) Holmium laser enucleation of the prostate (HoLEP) is widely performed in recent years; however, difficulties of surgical techniques and high frequency of postoperative stress urinary incontinence (SUI) remain as significant problems. We determined the predictive factors for de novo SUI after HoLEP. (Patients and methods) A total of 303 patients with benign prostatic hyperplasia who underwent HoLEP were retrospectively evaluated between July 2013 and April 2019. Of these, 109 patients underwent MRI preoperatively. Patients who were unable to answer the questionnaire regarding their SUI because of dementia, those who presented with SUI preoperatively, and those with placed Foley catheter at the time of MRI were excluded. Hence, a total of 83 patients were eligible for the present study. We recorded the MRI findings and clinical variables, including membranous urethral length (MUL), transitional zone (TZ) volume, serum prostate-specific antigen levels, operative time, and presence or absence of SUI. The predictive factors for de novo SUI were determined using multivariable logistic regression analysis. (Results)De novo SUI occurred in 19 (22.9%) patients but disappeared in 16 (84.2%) patients at a mean duration of 14 weeks. The mean MUL was 17.2 mm. Univariate analysis showed that MRI TZ volume >40 mL, MUL ≤17 mm, operative time >100 min, and enucleation time >50 min were associated with de novo SUI. In multivariable logistic regression analysis, MUL ≤17 mm (odds ratio [OR], 23.81; 95% confidence interval [CI], 4.34-447.19; P < 0.0001) and operative time >100 min (OR, 3.91; 95% CI, 1.20-14.01; P = 0.023) were significantly associated with de novo SUI. (Conclusions) Although de novo SUI occurred occasionally after HoLEP, most of them improved in about 3 months. The MRI measurement of MUL was shown to be a practical tool for predicting de novo SUI after HoLEP.

Analysis of Learning Curve in Robot-Assisted Radical Prostatectomy Performed by a Surgeon

This study aimed to report the learning curve in robot-assisted radical prostatectomy (RARP) performed by one surgeon who is experienced in laparoscopic prostatectomies. The records of 145 RARP cases performed between 2015 and 2017 were evaluated retrospectively. Patients were divided into three groups: group 1 comprised the first 49 cases, group 2 comprised 50–88 cases, and the rest of the cases were assigned to group 3. Continence was defined as the necessity to use at least one pad during a day. Additionally, erectile function recovery was defined as having erection sufficient for sexual intercourse regardless of using a phosphodiesterase type 5 inhibitor. Continence and erectile function recovery were assessed during interviews at 3, 6, and 12 months after surgery. First, all procedures were successfully performed without conversions or blood transfusions. The median follow-up period was 22 months. Moreover, the median skin-to-skin operative time (OT) was 220 minutes. The median blood loss was 150 ml, and the mean hospital stay was 8.9 ± 3.87 days. The median prostate volume was 36 cm³. The overall positive surgical margin rate was 13.1%. Overall, 38 (26.2%) postoperative complications were observed, and 17.9% of them were graded as minor. Anastomotic leakage decreased significantly from group 1 to group 3 (26.5% and 7%, respectively). The continence recovery (0-1 pad) rates were 60.6%, 75.7%, and 84.9% at 3, 6, and 12 months after surgery, respectively. Subsequently, the erectile function recovery rates were 50.9% and 65.4% at 6 and 12 months after surgery, respectively. In conclusion, there are several types of learning curves for RARP. First, the shallowest learning curve was observed for the OT. Regarding the analysis of “advanced learning curve,” demonstrating the improvement of OT and blood loss is considered insufficient. Therefore, additional oncological and functional results that require a longer period of investigation are required.

Economic evaluation of robot-assisted radical prostatectomy compared to open radical prostatectomy for prostate cancer treatment in Ontario, Canada

INTRODUCTION

Recent health technology assessments (HTAs) of robot-assisted radical prostatectomy (RARP) in Ontario and Alberta, Canada, resulted in opposite recommendations, calling into question whether benefits of RARP offset the upfront investment. Therefore, the study objectives were to conduct a cost-utility analysis from a Canadian public payer perspective to determine the cost-effectiveness of RARP.

METHODS

Using a 10-year time horizon, a five-state Markov model was developed to compare RARP to open radical prostatectomy (ORP). Clinical parameters were derived from Canadian observational studies and a recently published systematic review. Costs, resource utilization, and utility values from recent Canadian sources were used to populate the model. Results were presented in terms of increment costs per quality-adjusted life years (QALYs) gained. A probabilistic analysis was conducted, and uncertainty was represented using cost-effectiveness acceptability curves (CEACs). One-way sensitivity analyses were also conducted. Future costs and QALYs were discounted at 1.5%.

RESULTS

Total cost of RARP and ORP were $47 033 and $45 332, respectively. Total estimated QALYs were 7.2047 and 7.1385 for RARP and ORP, respectively. The estimated incremental cost-utility ratio (ICUR) was $25 704 in the base-case analysis. At a willingness-to-pay threshold of $50 000 and $100 000 per QALY gained, the probability of RARP being cost-effective was 0.65 and 0.85, respectively. The model was most sensitive to the time horizon.

CONCLUSIONS

The results of this analysis suggest that RARP is likely to be cost-effective in this Canadian patient population. The results are consistent with Alberta's HTA recommendation and other economic evaluations, but challenges Ontario's reimbursement decision.

Does urethral length affect continence outcomes following robot assisted laparoscopic radical prostatectomy (RALP)?

Background

Post-operative urinary incontinence is a significant concern for patients choosing to undergo a radical prostatectomy (RP) for treatment of prostate cancer. The aim of our study was to determine the effect of pre-operative MUL on 12 month continence outcomes in men having robot-assisted laparoscopic prostatectomy (RALP).

Methods

We use the South Australian Prostate Cancer Clinical Outcomes Collaborative (SA-PCCOC) database, to identify 602 patients who had undergone RALP by a high volume surgeon. Only patients who received an assessment and education by a specialist pelvic floor physiotherapist, had completed EPIC questionnaires before treatment and did not have radiotherapy treatment within 12 months of surgery were included. MUL measurements were taken from pre-operative magnetic resonance imaging (MRI) scans. The short-form version of the Expanded Prostate Cancer Index Composite (EPIC-26) was used to measure continence outcomes. Continence was defined as 100/100 in the EPIC-26 Urinary Continence domain score.

Results

The observed median MUL in this study was 14.6 mm. There was no association between MUL and baseline continence. MUL was associated with continence at 12 months post RALP (OR 1.13, 95% CI 1.03–1.21, p = 0.0098). In men who were continent before surgery, MUL was associated with return to continence at 12 months after RALP (OR 1.15, 1.05–1.28, p = 0.006). MUL was also associated with change in continence after surgery (β = 1.22, p = 0.002).

Conclusions

MUL had no effect on baseline continence but had a positive and significant association with continence outcomes over 12 months post RALP.

Incidence and Risk Factors of Pulmonary Complications after Robot-Assisted Laparoscopic Prostatectomy: A Retrospective Observational Analysis of 2208 Patients at a Large Single Center

Robot-assisted laparoscopic prostatectomy (RALP) is a minimally invasive technique for the treatment of prostate cancer. RALP requires the patient to be placed in the steep Trendelenburg position, along with pneumoperitoneum, which may increase the risk of postoperative pulmonary complications (PPCs). This large single-center retrospective study evaluated the incidence and risk factors of PPCs in 2208 patients who underwent RALP between 2014 and 2017. Patients were divided into those with (PPC group) and without (non-PPC group) PPCs. Postoperative outcomes were evaluated, and univariate and multivariate logistic regression analyses were performed to assess risk factors of PPCs. PPCs occurred in 682 patients (30.9%). Risk factors of PPCs included age (odds ratio [OR], 1.023; p = 0.001), body mass index (OR, 1.061; p = 0.001), hypoalbuminemia (OR, 1.653; p = 0.008), and positive end-expiratory pressure (PEEP) application (OR, 0.283; p < 0.001). The incidence of postoperative complications, rate of intensive care unit (ICU) admission, and duration of ICU stay were significantly greater in the PPC group than in the non-PPC group. In conclusion, the incidence of PPCs in patients who underwent RALP under pneumoperitoneum in the steep Trendelenburg position was 30.9%. Factors associated with PPCs included older age, higher body mass index, hypoalbuminemia, and lack of PEEP.

Preoperative magnetic resonance imaging in predicting early continence recovery after robotic radical prostatectomy

INTRODUCTION AND AIMS

Urinary incontinence is a common complication after radical prostatectomy. The aim of our study was to describe the preoperative anatomical features using magnetic resonance imaging in order to predict early continence recovery after robotic radical prostatectomy.

MATERIAL AND METHODS

72 patients who underwent robotic radical prostatectomy were prospectively analysed. EPIC questionnaire (1, 6 and 12 mo) and first self-reported continence were used to assess functional outcomes. Membranous urethral length (MUL) and MUL-prostate axis angle (aMULP) were assessed preoperatively on T2 weighted sagittal images.

RESULTS

Continence rate was 67.2%, 92.6% and 95.2% at 1, 6 and 12 months, respectively. Early continence was achieved in patients with the lower aMULP. At 1 month, average aMULP in continent patients was 107.21° (IC 95% 90.3-124.6) vs. 118.5° (IC 95% 117.7-134) in incontinent ones (P=.014). At 6 month differences in aMULP among groups were found: 114.24° (IC 95% 104.6-123.9) in continents vs. 142° (IC 95% 126.5-157.6) in incontinents (P=0.015). At 12 month, continent group showed a significantly higher preoperative aMULP. aMULP was revealed as the only independent predictor of urinary continence at 6 mo in multivariate analysis, OR 0.007 (IC 95% 0.002-0.012), P=0.012.

CONCLUSIONS

Preoperative anatomical parameters assessment prior surgery can help to identified those patients will achieve early continence recovery and it supports therapeutic decisions making.

Peri- and post-operative results of initial robot-assisted radical prostatectomies of a surgeon graduating from a structured fellowship

Background: No validated training curriculum for robotic surgery exists so far. International scientific societies like ERUS (EAU Robotic Urology Section) seek to validate a structured training program for robotic surgeons. In 2014, ERUS launched Pilot Study II, a 6-month structured training program to allow a surgeon without prior robotic training to perform a complete RARP (robot-assisted radical prostatectomy) independently and effectively. Aim of the study: Here we report the detailed courses and training materials, specific surgical activities and perioperative efficacy and safety results of the first 52 RARP cases performed by a single surgeon after graduating from Pilot Study II. The aim is to compare these results with the literature and show if this sophisticated training helps patients undergoing this type of surgery achieve advantageous perioperative results. Material and methods: The fellowship was conducted from January to June 2014 and consisted of lectures on technical and non-technical skills, as well as e-learning, bedside assistance (at least 20), intensive training consisting of laboratory training (i.e., virtual reality simulation, dry lab (plastic model), wet lab on animal cadavers and living anaesthetized pigs) and dual-console live surgery followed by five months of modular training, where the trainee performed different steps of the surgery at the host center. After passing the final evaluation (a full recorded video of RARP evaluated blindly by robotic experts), the trainee was deemed capable of performing efficiently and safely a full case of RARP. Here we retrospectively report the content of training and perioperative results of the surgeon’s initial 52 RARPs performed from July 2014 to April 2015. Results: After graduating from the fellowship, the surgeon performed 52 cases of RARP. The mean patient age was 65.2 years, initial PSA 12.9 ng/ml, prostate volume 43.7 ml in TRUS, BMI 27.5, and 61% of patients had a prior abdominal or pelvic surgery. Because of internal regulations, every patient had a pelvic lymphadenectomy performed, three of whom had positive lymph nodes. The average estimated blood loss was 225.7 ml, and no patient needed intraoperative blood transfusion. The average console time was 174.2 minutes. Final full-mount pathology identified 23 patients (44.2%) with a locally advanced prostate cancer (T3 or T4). Positive surgical margins were present in three cases. A further 29 patients (55.8%) had locally confined disease (T2). Positive surgical margins were observed in 2 cases. Catheters were removed on the 5th postoperative day followed by a cystogram, with no urine leakage observed in 96.2% of cases. The safety of the procedure was good with one major (Clavien 4) and 13 minor (Clavien 1 and 2, i.e., uncomplicated urinary infection, urinary retention) complications. Conclusions: The study showed that graduating from an intensive and structured learning program in robotic surgery resulted in a faster learning curve, allowing the trainee to reach high safety parameters in performed surgeries. When compared with already published series, advantageous results could be observed. The study was limited by its retrospective design, the moderate number of patients and variables such as individual motivation, dexterity and attitude of the person in training. The advantages of such training should be further evaluated in controlled, multi-center trials.

Effect of intraoperative mannitol administration on acute kidney injury after robot-assisted laparoscopic radical prostatectomy: A propensity score matching analysis

Mannitol, an osmotic diuretic, has been used to prevent acute kidney injury (AKI). However, studies have found divergent effects of intraoperative mannitol administration on postoperative AKI. We therefore evaluated the effects of intraoperative mannitol administration on AKI after robot-assisted laparoscopic radical prostatectomy (RALP) in prostate cancer patients.A total of 864 patients who underwent RALP were divided into mannitol (administered at 0.5 g/kg) and no-mannitol groups. Demographics, cancer-related data, preoperative laboratory values, intraoperative data, and postoperative outcomes such as AKI, chronic kidney disease at 12 months postoperation, duration of hospital stay, and intensive care unit admission rate and duration of stay were compared between the 2 groups using propensity score matching analysis. To determine the risk factors for AKI after RALP, univariate and multivariate logistic regression analyses were performed. Postoperative AKI was defined according to the Kidney Disease: Improving Global Outcomes criteria.After performing 1:1 propensity score matching, the mannitol and no-mannitol groups included 234 patients each. The overall incidence of AKI after RALP was 5.1% and was not significantly different between the no-mannitol and mannitol groups in the propensity score-matched patients (13 [5.6%] vs. 11 [4.7%], P = .832). Univariate logistic regression analysis revealed that body mass index and operative time were associated with AKI in 864 patients who underwent RALP. However, intraoperative mannitol administration was not associated with AKI after RALP (P = .284). Multivariate logistic regression analysis revealed that operative time was significantly associated with AKI after RALP (odds ratio = 1.013, P = .001). The incidence of chronic kidney disease (13 [5.6%] vs. 12 [5.1%], P = 1.000) and other postoperative outcomes were not also significantly different between the no-mannitol and mannitol groups in the propensity score-matched patients.Intraoperative mannitol administration has no beneficial effect on the prevention of AKI after RALP in prostate cancer patients. This result provides useful information for clinical practice guidelines regarding intraoperative mannitol use.

Effect of Mannitol on Ultrasonographically Measured Optic Nerve Sheath Diameter as a Surrogate for Intracranial Pressure During Robot-Assisted Laparoscopic Prostatectomy with Pneumoperitoneum and the Trendelenburg Position

INTRODUCTION

CO₂ pneumoperitoneum and the steep Trendelenburg position during robot-assisted laparoscopic prostatectomy (RALP) can increase intracranial pressure (ICP). Mannitol is widely used to treat increased ICP. However, no studies to date have specifically evaluated the effect of mannitol on ICP in patients undergoing RALP. Ultrasonographic measurement of the optic nerve sheath diameter (ONSD) is considered a reliable technique to noninvasively evaluate the ICP. Therefore, this study compared ONSDs as a surrogate for ICP before and after mannitol administration in prostate cancer patients undergoing RALP.

METHODS

Mannitol (0.5 g/kg) was administered after pneumoperitoneum establishment and shifting to the Trendelenburg position. ONSDs were measured at six predetermined time points: 10 minutes after anesthesia induction (T0); 5 minutes after pneumoperitoneum and the Trendelenburg position before mannitol administration (T1); 30 minutes (T2), 60 minutes (T3), and 90 minutes (T4) after completion of mannitol administration during pneumoperitoneum and the Trendelenburg position; and at skin closure in the supine position (T5). Moreover, intraoperative hemodynamic and respiratory variables were evaluated simultaneously.

RESULTS

Thirty-six patients were analyzed. ONSDs were significantly lower at T2, T3, and T4 than at T1 (all p < 0.001), with the greatest decrease observed at T4 compared with T1 (4.46 ± 0.2 mm vs 4.81 ± 0.3 mm, p < 0.001). Regional cerebral oxygen saturation, cardiac output, corrected flow time, peak velocity, body temperature, arterial CO₂ partial pressure, peak airway pressure, plateau airway pressure, dynamic compliance, and static compliance were not significantly different during pneumoperitoneum and the Trendelenburg position; however, mean arterial blood pressure and heart rate were significantly different.

CONCLUSIONS

Mannitol decreases the ONSD in patients undergoing RALP with CO₂ pneumoperitoneum and the steep Trendelenburg position. This result provides useful information on the beneficial effects of mannitol administration on prostate cancer patients who may develop increased ICP during RALP.

Robotic vs. Retropubic radical prostatectomy in prostate cancer: A systematic review and an meta-analysis update

CONTEXT

The safety and feasibility of robotic-assisted radical prostatectomy (RARP) compared with retropubic radical prostatectomy(RRP) is debated. Recently, a number of large-scale and high-quality studies have been conducted.

OBJECTIVE

To obtain a more valid assessment, we update the meta-analysis of RARP compared with RRP to assessed its safety and feasibility in treatment of prostate cancer.

METHODS

A systematic search of Medline, Embase, Pubmed, and the Cochrane Library was performed to identify studies that compared RARP with RRP. Outcomes of interest included perioperative, pathologic variables and complications.

RESULTS

78 studies assessing RARP vs. RRP were included for meta-analysis. Although patients underwent RRP have shorter operative time than RARP (WMD: 39.85 minutes; P < 0.001), patients underwent RARP have less intraoperative blood loss (WMD = -507.67ml; P < 0.001), lower blood transfusion rates (OR = 0.13; P < 0.001), shorter time to remove catheter (WMD = -3.04day; P < 0.001), shorter hospital stay (WMD = -1.62day; P < 0.001), lower PSM rates (OR:0.88; P = 0.04), fewer positive lymph nodes (OR:0.45;P < 0.001), fewer overall complications (OR:0.43; P < 0.001), higher 3- and 12-mo potent recovery rate (OR:3.19;P = 0.02; OR:2.37; P = 0.005, respectively), and lower readmission rate (OR:0.70, P = 0.03). The biochemical recurrence free survival of RARP is better than RRP (OR:1.33, P = 0.04). All the other calculated results are similar between the two groups.

CONCLUSIONS

Our results indicate that RARP appears to be safe and effective to its counterpart RRP in selected patients.

Neurovascular bundle size measured on 3.0-T magnetic resonance imaging is associated with the recovery of erectile function after robot-assisted radical prostatectomy

BACKGROUND AND OBJECTIVE

Erectile dysfunction is one of the complications occurring after radical prostatectomy (RP), and recovery of erectile function is quantitatively related to the preservation of the neurovascular bundles (NVB).We evaluated the significance of NVB area on functional outcomes after RP.

MATERIALS AND METHODS

Preoperative magnetic resonance imaging was performed on 141 patients who underwent bilateral, nerve-sparing, robot-assisted RP for clinically localized prostate cancer (clinically T2N0M0 on magnetic resonance imaging) and were evaluated at least 12 months after surgery. NVB area was measured as a region of interest that coincided with the outline of the maximum area of the posterolateral region of the prostate on T2-weighted axial imaging. Factors associated with functional outcomes were evaluated using logistic regression analysis.

RESULTS

Of 141 patients, 36 patients (25.5%) had no preoperative potency (group 1), 66 patients (46.8%) recovered potency (group 2), and 39 patients (27.7%) did not recover potency (group 3). Although the mean age of the entire cohort was 65.4 years, the mean age of group 1 was greater than groups 2 and 3 (P = 0.001). The NVB area of group 2 was larger than those of groups 1 and 3 (P = 0.001). Potency evaluations involved 105 patients (74.5%; groups 2 and 3), and patients with pre-existing erectile dysfunction were excluded. The median time to potency recovery was 3.0 months after surgery. The multivariable analysis revealed that the NVB area was the only significant factor predictive of potency recovery.

CONCLUSIONS

The NVB area in the posterolateral region of the prostate is an independent factor for predicting potency recovery. The degree of postoperative erectile function can be predicted based on the preoperative NVB area.

Surgeon Performance Predicts Early Continence After Robot-Assisted Radical Prostatectomy

INTRODUCTION

There is limited, yet compelling evidence supporting the role of surgeon technical performance in influencing patient outcomes. To date, this concept has been underexplored in endourologic procedures. We hypothesized that a surgeon's technical performance plays a role in predicting an early return to continence after robot-assisted radical prostatectomy (RARP).

MATERIALS AND METHODS

We conducted a retrospective, matched case-control analysis of prospectively collected unedited RARP endoscopic videos performed by a single surgeon. A blinded observer with expertise in intraoperative video analysis evaluated clinically relevant steps of RARP using the global evaluative assessment of robotic skill (GEARS) and the generic error rating tool (GERT). The primary outcome was continence status at 3 months postoperatively, defined as patient use of less than or equal to a single precautionary pad. Mann-Whitney U tests examined differences in predictor variables between cases and controls, and multivariate analysis was conducted using binary logistic regression models.

RESULTS

Twenty-four incontinent patients were matched for age, body mass index, preoperative International Prostate Symptoms Score, use of posterior/anterior hitch, prostate weight, and learning curve position. No statistically significant difference in errors between groups was observed using the GERT. On multivariate analysis, overall case GEARS score was independently predictive of 3-month continence status (odds ratios [OR] = 0.55, 95% confidence interval [CI] 0.33-0.91), as were urethrovesical anastomosis (OR = 0.70, 95% CI 0.50-0.97) and bladder neck GEARS scores (OR = 0.69, 95% CI 0.51-0.94).

CONCLUSIONS

Our study generates the hypothesis that there may be a link between surgeon technical performance and functional outcomes in RARP. This relationship may have implications for the accreditation and training of future urologists and warrants further investigation.

Heterogeneous oncologic outcomes according to surgical pathology in high-risk prostate cancer: implications for better risk stratification and preoperative prediction of oncologic outcomes

PURPOSE

To evaluate the better risk stratification based on surgical pathology, and to predict oncologic outcomes after radical prostatectomy (RP) with a better scoring system in high-risk prostate cancer (PCa) patients.

METHODS

We evaluated high-risk PCa patients (PSA >20 ng/ml, ≥cT3a, or Gleason score 8-10) who underwent RP between 2007 and 2013 at our institute. We classified patients into three groups according to their pathologic outcomes: favorable (pT2, Gleason score ≤7, and node negative), intermediate (specimen-confined disease (pT2-3a, node negative PCa with negative surgical margins) but not in the favorable group), and unfavorable (the remaining patients). We developed a risk stratification scoring system to predict prognostic outcomes after RP and validated our scoring system to estimate its predictive accuracy.

RESULTS

Among a total of 356 patients, 95 (26.7%), 115 (32.3%), and 146 (41%) were in the favorable, intermediate, and unfavorable prognostic groups, respectively. The 5-year biochemical recurrence-free survival rates of the patients in each group were 87.8, 64.6, and 41.4%, respectively. We developed a scoring system based on preoperative PSA, clinical stage, percentage of tumor positive core, and percentage of cores with a Gleason score 8-10. This demonstrated internally and externally validated concordance indices of 0.733 and 0.772, respectively.

CONCLUSIONS

Using our scoring system, we can predict which patients with high-risk PCa would benefit more from RP. Thus, this system can be used in patient counseling to determine an optimal treatment strategy for high-risk PCa.

[Surgical approach and sexual outcomes after radical prostatectomy]

BACKGROUND

Radical prostatectomy is curative surgical treatment of choice for localized prostate cancer. The objectives are cancer control, preservation of continence and preservation of sexuality, the combination of the three constituting the Trifecta.

OBJECTIVE

The objective of this study was to assess, through the analysis of the literature, the sexual outcomes according to surgical approach: radical prostatectomy by laparotomy (PRL), laparoscopic radical prostatectomy (PRLa) and laparoscopic robot-assisted radical prostatectomy (PRLaRA), when nerve sparing was practiced.

METHODS

An exhaustive and retrospective review of literature was conducted using the Pubmed search with the following keywords: "Prostatic Neoplasms" [Mesh], "Prostatectomy" [Mesh], "Erectile Dysfunction" [Mesh], "Robotics" [Mesh], "Laparoscopy" [Mesh], Nerve sparing.

SELECTION CRITERIA

The selected articles were prospective or retrospective series including more than 200 patients, randomized trials and meta-analyses published between 1990 and 2014.

RESULTS

A total of 21 prospective studies (6 on PRL, 4 on PRLa and 11 on PRLaRA), 12 retrospective studies (6 on PRL, 1 on PRLa and 5 on PRLaRA), 2 randomized controlled trial and 3 meta-analyses were selected from 1992 to 2013. There was no evidence of the superiority of one surgical approach compared to others in terms of sexuality.

LIMITS

Articles with level 1 of scientific evidence have discordant results, due to heterogeneity in the assessment criteria of postoperative sexual function.

CONCLUSION

According to our knowledge, there is currently no difference in terms of sexual outcomes between PRL, PRLA and PRLaRA approaches.

Erectile dysfunction after radical prostatectomy: prevalence, medical treatments, and psychosocial interventions

PURPOSE OF REVIEW

This review will discuss erectile dysfunction in prostate cancer patients following radical prostatectomy . It will focus on the prevalence and current treatments for erectile dysfunction as well as the emotional impact of erectile dysfunction and the current psychosocial interventions designed to help patients cope with this side effect.

RECENT FINDINGS

Although there is a large discrepancy in prevalence rates of erectile dysfunction after radical prostatectomy, several recent studies have cited rates as high as 85%. The concept of 'penile rehabilitation' is now the standard of practice to treat erectile dysfunction following radical prostatectomy. However, many men avoid seeking help or utilizing erectile dysfunction treatments. This avoidance is related to the shame, frustration, and distress many men with erectile dysfunction and their partners experience. Recent psychosocial interventions have been developed to facilitate the use of treatments and help men cope with erectile dysfunction. These interventions have shown initial promise, however, continued intervention development is needed to reduce distress and improve long-term erectile function outcomes.

SUMMARY

Erectile dysfunction is a significant problem following prostate cancer surgery. Although there are effective medical treatments, the development of psychosocial interventions should continue to evolve to maximize the assistance we can give to men and their partners.

A Randomized Study of Intraoperative Autologous Retropubic Urethral Sling on Urinary Control after Robotic Assisted Radical Prostatectomy

PURPOSE

We evaluated whether placement of a retropubic urethral sling fashioned from autologous vas deferens during robotic assisted radical prostatectomy would improve recovery of continence.

MATERIALS AND METHODS

In a phase 2, single blind trial age stratified patients were randomized to undergo robotic assisted radical prostatectomy by multiple surgeons with or without sling placement. The outcomes were complete continence (0 urinary pads of any type) and near continence (0, an occasional or 1 pad per day) at 6 months, which was assessed by the Fisher exact test and logistic regression. The Kaplan-Meier method and the log rank test were used to evaluate time to continence. EPIC-UIN (Expanded Prostate Cancer Index Composite-Urinary Inventory) and I-PSS (International Prostate Symptom Score) 1, 3 and 6 months after catheter removal were evaluated by mixed models for repeated measures.

RESULTS

Of 203 patients who were recruited 95 and 100 were randomized to undergo sling and no sling placement, respectively, and completed postoperative interviews. Six months after surgery the proportions reporting complete and near continence (66% and 87%, respectively) and times to complete and near continence were similar in the groups. Younger age was associated with a higher likelihood of complete continence (OR 1.74 per decreasing 5-year interval, 95% CI 1.23-2.48, p <0.01) and near continence (OR 2.18 per decreasing 5-year interval, 95% CI 1.21-3.92, p <0.01) adjusting for clinical, urinary and surgical factors. Adjusted EPIC-UIN and I-PSS scores changed with time but did not differ between the groups. No serious adverse events were observed.

CONCLUSIONS

This trial failed to demonstrate a benefit of autologous urethral sling placement at robotic assisted radical prostatectomy on early return of continence at 6 months. Continence was related to patient age in adjusted models.

Recovery of urinary continence after radical prostatectomy

INTRODUCTION

In the era of minimally-invasive surgery, urinary incontinence (UI) after radical prostatectomy (RP) still represents a troublesome issue for a considerable rate of patients. Factors associated with the risk of post-RP UI, need to be carefully assessed throughout the overall clinical management process thus including the pre-operative, intra-operative and post-operative setting.

AREAS COVERED

This review analyses current published evidences regarding clinical and surgical aspects associated with urinary continence (UC) recovery after RP. A careful evaluation of patient's clinical characteristics should be carried out before surgery in order to properly counsel the patients regarding the risk of UI. In the last two decades, the advent of robotic surgery has led to an overall improvement of functional outcomes after RP, thanks to the development of different surgical strategies based on either the 'preservation' or the 'reconstruction' of the anatomical elements responsible for urinary continence. Finally, several therapeutic strategies including either a conservative approach, or pharmacological and surgical treatments, should be carefully considered for the post-operative management of UI. Expert commentary: A comprehensive pre-operative patient's clinical assessment, along with a proper and well-conducted surgical procedure and an effective post-operative care management are essential element to achieve a high probability of UC recovery.

Comparison of Robot-Assisted Radical Prostatectomy and Open Radical Prostatectomy Outcomes: A Systematic Review and Meta-Analysis

PURPOSE

To systematically update evidence on the clinical efficacy and safety of robot-assisted radical prostatectomy (RARP) versus retropubic radical prostatectomy (RRP) in patients with prostate cancer.

MATERIALS AND METHODS

Electronic databases, including ovidMEDLINE, ovidEMBASE, the Cochrane Library, KoreaMed, KMbase, and others, were searched, collecting data from January 1980 to August 2013. The quality of selected systematic reviews was assessed using the revised assessment of multiple systematic reviews and the modified Cochrane Risk of Bias tool for non-randomized studies.

RESULTS

A total of 61 studies were included, including 38 from two previous systematic reviews rated as best available evidence and 23 additional studies that were more recent. There were no randomized controlled trials. Regarding safety, the risk of complications was lower for RARP than for RRP. Among functional outcomes, the risk of urinary incontinence was lower and potency rate was significantly higher for RARP than for RRP. Regarding oncologic outcomes, positive margin rates were comparable between groups, and although biochemical recurrence (BCR) rates were lower for RARP than for RRP, recurrence-free survival was similar after long-term follow up.

CONCLUSION

RARP might be favorable to RRP in regards to post-operative complications, peri-operative outcomes, and functional outcomes. Positive margin and BCR rates were comparable between the two procedures. As most of studies were of low quality, the results presented should be interpreted with caution, and further high quality studies controlling for selection, confounding, and selective reporting biases with longer-term follow-up are needed to determine the clinical efficacy and safety of RARP.

Postprostatectomy Erectile Dysfunction: A Review

In the current era of the early diagnosis of prostate cancer (PCa) and the development of minimally invasive surgical techniques, erectile dysfunction (ED) represents an important issue, with up to 68% of patients who undergo radical prostatectomy (RP) complaining of postoperative erectile function (EF) impairment. In this context, it is crucial to comprehensively consider all factors possibly associated with the prevention of post-RP ED throughout the entire clinical management of PCa patients. A careful assessment of both oncological and functional baseline characteristics should be carried out for each patient preoperatively. Baseline EF, together with age and the overall burden of comorbidities, has been strongly associated with the chance of post-RP EF recovery. With this goal in mind, internationally validated psychometric instruments are preferable for ensuring proper baseline EF evaluations, and questionnaires should be administered at the proper time before surgery. Careful preoperative counselling is also required, both to respect the patient's wishes and to avoid false expectations regarding eventual recovery of baseline EF. The advent of robotic surgery has led to improvements in the knowledge of prostate surgical anatomy, as reflected by the formal redefinition of nerve-sparing techniques. Overall, comparative studies have shown significantly better EF outcomes for robotic RP than for open techniques, although data from prospective trials have not always been consistent. Preclinical data and several prospective randomized trials have demonstrated the value of treating patients with oral phosphodiesterase 5 inhibitors (PDE5is) after surgery, with the concomitant potential benefit of early re-oxygenation of the erectile tissue, which appears to be crucial for avoiding the eventual penile structural changes that are associated with postoperative neuropraxia and ultimately result in severe ED. For patients who do not properly respond to PDE5is, proper counselling regarding intracavernous treatment should be considered, along with the further possibility of surgical treatment for ED involving the implantation of a penile prosthesis.

Preoperative Membranous Urethral Length Measurement and Continence Recovery Following Radical Prostatectomy: A Systematic Review and Meta-analysis

CONTEXT

Membranous urethral length (MUL) measured prior to radical prostatectomy (RP) has been identified as a factor that is associated with the recovery of continence following surgery.

OBJECTIVE

To undertake a systematic review and meta-analysis of all studies reporting the effect of MUL on the recovery of continence following RP.

EVIDENCE ACQUISITION

A comprehensive search of PubMed, EMBASE, and Scopus databases up to September 2015 was performed. Thirteen studies comprising one randomized controlled trial and 12 cohort studies were selected for inclusion.

EVIDENCE SYNTHESIS

Four studies (1738 patients) that reported hazard ratio results. Every extra millimeter (mm) of MUL was associated with a faster return to continence (hazard ratio: 1.05; 95% confidence interval [CI]: 1.02-1.08, p<0.001). Eleven studies (6993 patients) reported the OR (OR) for the return to continence at one or more postoperative time points. MUL had a significant positive effect on continence recovery at 3 mo (OR: 1.08, 95% CI: 1.03-1.14, p=0.004), 6 mo (OR: 1.12, 95% CI: 1.09-1.15, p<0.0001). and 12 mo (OR: 1.12, 95% CI: 1.03-1.22, p=0.006) following surgery. After adjusting for repeated measurements over time and studies with overlapping data, all OR data combined indicated that every extra millimeter of MUL was associated with significantly greater odds for return to continence (OR: 1.09, 95% CI: 1.05-1.15, p<0.001).

CONCLUSIONS

A greater preoperative MUL is significantly and positively associated with a return to continence in men following RP. Magnetic resonance imaging measurement of MUL is recommended prior to RP.

PATIENT SUMMARY

We examined the effect that the length of a section of the urethra (called the membranous urethra) had on the recovery of continence after radical prostatectomy surgery. Our results indicate that measuring the length of the membranous urethra via magnetic resonance imaging before surgery may be useful to predict a longer period of urinary incontinence after surgery, or to explain a delay in achieving continence after surgery.

A Multidimensional Analysis of Prostate Surgery Costs in the United States: Robotic-Assisted versus Retropubic Radical Prostatectomy

BACKGROUND

The economic value of robotic-assisted laparoscopic prostatectomy (RALP) in the United States is still not well understood because of limited view analyses.

OBJECTIVES

The objective of this study was to examine the costs and benefits of RALP versus retropubic radical prostatectomy from an expanded view, including hospital, payer, and societal perspectives.

METHODS

We performed a model-based cost comparison using clinical outcomes obtained from a systematic review of the published literature. Equipment costs were obtained from the manufacturer of the robotic system; other economic model parameters were obtained from government agencies, online resources, commercially available databases, an advisory expert panel, and the literature. Clinical point estimates and care pathways based on National Comprehensive Cancer Network guidelines were used to model costs out to 3 years. Hospital costs and costs incurred for the patients' postdischarge complications, adjuvant and salvage radiation treatment, incontinence and potency treatment, and lost wages during recovery were considered. Robotic system costs were modeled in two ways: as hospital overhead (hospital overhead calculation: RALP-H) and as a function of robotic case volume (robotic amortization calculation: RALP-R). All costs were adjusted to year 2014 US dollars.

RESULTS

Because of more favorable clinical outcomes over 3 years, RALP provided hospital ($1094 savings with RALP-H, $341 deficit with RALP-R), payer ($1451), and societal ($1202) economic benefits relative to retropubic radical prostatectomy.

CONCLUSIONS

Monte-Carlo probabilistic sensitivity analysis demonstrated a 38% to 99% probability that RALP provides cost savings (depending on the perspective). Higher surgical consumable costs are offset by a decreased hospital stay, lower complication rate, and faster return to work.

Erectile Function Recovery After Nerve-Sparing Radical Prostatectomy for Prostate Cancer: Is Back to Baseline Status Enough for Patient Satisfaction?

INTRODUCTION

Several definitions of erectile function (EF) recovery after bilateral nerve-sparing radical prostatectomy (BNSRP) have been proposed based on the results of the International Index of EF (IIEF).

AIM

We aimed at evaluating overall satisfaction (OS) after BNSRP according to the ability to achieve the pretreatment EF.

METHODS

We evaluated data of 652 patients treated with BNSRP for clinically localized prostate cancer (PCa). Erectile dysfunction (ED) was classified according to the IIEF-EF domain score. Return to baseline EF was defined as patients who reached the same preoperative ED category during the 3-year follow-up. Cox regression analyses were fitted to predict return to baseline IIEF-EF and to predict OS defined according to the IIEF-OS in the overall population. Logistic regression analyses were performed to analyze OS in men who reached the back to baseline status.

MAIN OUTCOME MEASURES

The outcome of the study was to evaluate back to baseline EF status and to correlate it with postoperative OS.

RESULTS

Preoperative satisfaction was reported by 218 (33.4%) patients. Postoperative satisfaction was achieved by 103 patients. Overall, 383 patients were able to achieve the preoperative IIEF-EF score. However, only 26.9% reported being satisfied. Age and preoperative IIEF-EF score were significantly associated with baseline IIEF-EF recovery (all P ≤ .02). Patients who were able to return to baseline IIEF-EF were more likely to be satisfied (P < .001). Time elapsed between surgery and achievement of baseline IIEF-EF was significantly associated with OS (P < .001). Among patients who were able to achieve the baseline IIEF-EF score, a preoperative IIEF-EF of 22-25 and 26-30 was significantly associated with postoperative satisfaction (all P < .001).

CONCLUSION

After BNSRP, reaching the baseline IIEF-EF score is not always sufficient to obtain patient satisfaction. Only patients with a preoperative IIEF-EF ≥22 who reached the baseline score after surgery considered themselves satisfied. This should be taken into account in preoperative patient counseling.

Robotic surgery: disruptive innovation or unfulfilled promise? A systematic review and meta-analysis of the first 30 years

Background

Robotic surgery has been in existence for 30 years. This study aimed to evaluate the overall perioperative outcomes of robotic surgery compared with open surgery (OS) and conventional minimally invasive surgery (MIS) across various surgical procedures.

Methods

MEDLINE, EMBASE, PsycINFO, and ClinicalTrials.gov were searched from 1990 up to October 2013 with no language restriction. Relevant review articles were hand-searched for remaining studies. Randomised controlled trials (RCTs) and prospective comparative studies (PROs) on perioperative outcomes, regardless of patient age and sex, were included. Primary outcomes were blood loss, blood transfusion rate, operative time, length of hospital stay, and 30-day overall complication rate.

Results

We identified 99 relevant articles (108 studies, 14,448 patients). For robotic versus OS, 50 studies (11 RCTs, 39 PROs) demonstrated reduction in blood loss [ratio of means (RoM) 0.505, 95 % confidence interval (CI) 0.408–0.602], transfusion rate [risk ratio (RR) 0.272, 95 % CI 0.165–0.449], length of hospital stay (RoM 0.695, 0.615–0.774), and 30-day overall complication rate (RR 0.637, 0.483–0.838) in favour of robotic surgery. For robotic versus MIS, 58 studies (21 RCTs, 37 PROs) demonstrated reduced blood loss (RoM 0.853, 0.736–0.969) and transfusion rate (RR 0.621, 0.390–0.988) in favour of robotic surgery but similar length of hospital stay (RoM 0.982, 0.936–1.027) and 30-day overall complication rate (RR 0.988, 0.822–1.188). In both comparisons, robotic surgery prolonged operative time (OS: RoM 1.073, 1.022–1.124; MIS: RoM 1.135, 1.096–1.173). The benefits of robotic surgery lacked robustness on RCT-sensitivity analyses. However, many studies, including the relatively few available RCTs, suffered from high risk of bias and inadequate statistical power.

Conclusions

Our results showed that robotic surgery contributed positively to some perioperative outcomes but longer operative times remained a shortcoming. Better quality evidence is needed to guide surgical decision making regarding the precise clinical targets of this innovation in the next generation of its use.

Comparison of Acute Kidney Injury After Robot-Assisted Laparoscopic Radical Prostatectomy Versus Retropubic Radical Prostatectomy: A Propensity Score Matching Analysis

Acute kidney injury (AKI) is associated with extended hospital stay, a high risk of progressive chronic kidney diseases, and increased mortality. Patients undergoing radical prostatectomy are at increased risk of AKI because of intraoperative bleeding, obstructive uropathy, older age, and preexisting chronic kidney disease. In particular, robot-assisted laparoscopic radical prostatectomy (RALP), which is in increasing demand as an alternative surgical option for retropubic radical prostatectomy (RRP), is associated with postoperative renal dysfunction because pneumoperitoneum during RALP can decrease cardiac output and renal perfusion. The objective of this study was to compare the incidence of postoperative AKI between RRP and RALP.We included 1340 patients who underwent RRP (n = 370) or RALP (n = 970) between 2013 and 2014. Demographics, cancer-related data, and perioperative laboratory data were evaluated. Postoperative AKI was determined according to the Kidney Disease: Improving Global Outcomes criteria. Operation and anesthesia time, estimated blood loss, amounts of administered fluids and transfused packed red blood cells, and the lengths of the postoperative intensive care unit and hospital stays were evaluated. Propensity score matching analysis was performed to reduce the influence of possible confounding variables and adjust for intergroup differences between the RRP and RALP groups.After performing 1:1 propensity score matching, the RRP and RALP groups included 307 patients, respectively. The operation time and anesthesia time in RALP were significantly longer than in the RRP group (both P < 0.001). However, the estimated blood loss and amount of administered fluids in RALP were significantly lower than in RRP (both P < 0.001). Also, RALP demonstrated a significantly lower incidence of transfusion and smaller amount of transfused packed red blood cells than RRP (both P < 0.001). Importantly, the incidence of AKI in RALP was significantly lower than in RRP (5.5% vs 10.4%; P = 0.044). Furthermore, the length of hospital stay in RALP was also significantly shorter (P < 0.001).The incidence of AKI after RALP is significantly lower than after RRP. RALP can therefore be a better surgical option than RRP in terms of decreasing the frequency of postoperative AKI.

Prevention and management of post prostatectomy erectile dysfunction

Sexual dysfunction is common in patients with prostate cancer (PC) following radical prostatectomy (RP). Review the available literature concerning prevention and management strategies for post-RP erectile function (EF) impairment in terms of preoperative patient characteristics, intra and postoperative factors that may influence EF recovery, and postoperative treatments for erectile dysfunction (ED). A literature search was performed using Google and PubMed database for English-language original and review articles, either published or e-published up to July 2013. The literature still demonstrates a great inconsistency in the definition of what is considered normal EF both before and after RP. Thus, using validated psychometric instruments with recognized cut-offs for normalcy and severity during the pre- and post-operative evaluation should be routinely considered. Therefore, a comprehensive discussion with the patient about the true prevalence of postoperative ED, the concept of spontaneous or pharmacologically-assisted erections, and the difference between “back to baseline” EF and “erections adequate enough to have successful intercourse” clearly emerge as key issues in the eventual understanding of post-RP ED prevention and promotion of satisfactory EF recovery. Patient factors (including age, baseline EF, comorbid conditions status), cancer selection (non- vs. uni- vs. bilateral nerve-sparing), type of surgery (i.e., intra vs. inter vs. extrafascial surgeries), surgical techniques (i.e., open, laparoscopic and robotically-assisted RP), and surgeon factors (i.e., surgical volume and surgical skill) represent the key significant contributors to EF recovery. A number of preclinical and clinical data show that rehabilitation and treatment in due time are undoubtedly better than leaving the erectile tissue to its unassisted postoperative fate. The role of postoperative ED treatment for those patients who received a non-nerve-sparing RP was also extensively discussed. Optimal outcomes are achieved mainly by the careful choice of the correct patient for the correct type of surgery. Despite a plethora of potential rehabilitative approaches, they should be only considered as “strategies”, since incontrovertible evidence of their effectiveness for improving natural EF recovery is limited. Conversely, numerous effective therapeutic options are available for treating post-RP ED.

Pharmacologic and surgical therapies for sexual dysfunction in male cancer survivors

The recent recognition that many men experience sexual dysfunction following their diagnosis and treatment of genitourinary cancers, has led to the development multiple varied strategies that attempt to restore or preserve that function. In this manuscript we review the understanding of why it happens, highlight novel management strategies and discuss the concept of penile rehabilitation (PR) following prostate cancer (PCa) treatment, glans preserving strategies among men diagnosed with penile cancer and address the controversial issue of testosterone therapy in men with PCa.