Robotic Surgery as Applied to Functional and Reconstructive Urology

What Is Needed to Determine and Potentially Improve the Clinical Effectiveness and Cost-Effectiveness of Robot-Assisted Reconstructive Urinary Tract and Pelvic Floor Surgery?-ICI-RS 2024

INTRODUCTION

Robot-assisted (RA) surgery has many advantages for urinary tract and pelvic floor reconstruction (UTPFR) but its application is only slowly increasing. Studies are limited in number, patients and follow-up duration. The low-volume high-complexity nature of UTPFR warrants specific research to evaluate the potential role of the RA approach.

METHODS

During its 2024 meeting in Bristol, the International Consultation on Incontinence-Research Society (ICI-RS) reviewed the current literature on RA UTPFR. Priority research questions and strategies were explored in a proposal.

RESULTS

Four different topics were discussed. (1) Large multicentre prospective studies on RA UTPFR are needed to evaluate clinical effectiveness and safety. The RA approach needs to be prioritized in specific procedures and patients, to first improve patient care where gains are highest. (2) Models for cost-utility analysis for RA UTPFR are needed to (re)direct limited resources as efficiently as possible in a quickly changing technological field. (3) A modular curriculum for training UTPFR surgeons to become RA certified needs to be developed, to allow valid interpretation and comparison of outcomes. (4) Technological improvements to address tissue handling, accessibility, efficiency and sustainability are needed. Digitalization can be a gamechanger for RA UTPFR through telesurgery (training and expertize coverage), augmented reality and artificial intelligence providing intra-operative assistance, assessment and feedback.

CONCLUSIONS

The proposal discussed the need for studies on clinical and cost effectiveness, safety, and training curriculum development for RA UTPFR. Recent technological developments hold great promise for RA UTPFR. High-priority research questions were identified.

The Learning Curve in Urogynecology and Functional Urology: A Systematic Review

INTRODUCTION AND HYPOTHESIS

When adopting new methods, surgeons may experience a period of complexity and longer operation times because of their inexperience. This period is known as the "learning curve." This study was aimed at systematically reviewing the current literature on functional urology learning curves.

METHODS

A comprehensive search was conducted across multiple databases from inception to July 2023 with no language restrictions. All original studies on urogynecological and functional urological procedures, including cross-sectional, cohort, and clinical trials, were eligible for inclusion. Relevant data were extracted, and methodological quality was appraised using standardized Joanna Briggs Institute critical appraisal tools. To quantitatively investigate learning curves, a mixed-effects generalized linear regression analysis was conducted on studies employing cumulative summation methods.

RESULTS

From the 7,104 records, 68 studies met the inclusion criteria. The majority of studies were observational and the most common outcome measures were surgical duration, blood loss, and hospital stay. The learning curves varied by procedure type-for incontinence surgeries, 15-80 cases were required; for pelvic organ prolapse surgeries, 18-47 cases; for laparoscopic procedures, 10-105 cases; and for robotic procedures, 5-84 cases. The analysis showed that the number of cases required to surpass the learning curve decreased over time, likely reflecting technological advancements and increased surgical experience.

CONCLUSION

The learning curve for surgical procedures varies significantly. It varies between 5 cases for robotic supratrigonal cystectomy to 75 cases for robot-assisted ventral mesh rectopexy or robotic sacrocolpopexy surgery in 84 cases. These variable learning curves highlight the need for structured training programs and ongoing assessment.

Technical Strategies and Learning Curve in Robotic-assisted Peripheral Nerve Surgery

Background

Robotic-assisted peripheral nerve surgery (RASPN) has emerged as a promising advancement in microsurgery, offering enhanced precision and tremor reduction for nerve coaptations. This study investigated the largest published patient collective in RASPN and provided specific technical aspects, operative setups, and a learning curve.

Methods

Data collection involved creating a prospective database that recorded surgical details such as surgery type, duration, nerve coaptation time, and number of stitches. The experienced surgeon first underwent a 12-hour training program utilizing the Symani robot system in combination with optical magnification tools before using the system clinically.

Results

The study included 19 patients who underwent robot-assisted peripheral nerve reconstruction. The cohort included six men (31.6%) and 13 women (68.4%), with an average age of 53.8 ± 18.4 years. The procedures included nerve transfers, targeted muscle reinnervation, neurotized free flaps, and autologous nerve grafts. Learning curve analysis revealed no significant reduction in time per stitch over the initial nine coaptations (4.9 ± 0.5 min) compared with the last 10 coaptations (5.5 ± 1.5 min).

Conclusions

The learning curve for RASPN was compared with early experiences with other surgical robots, emphasizing the importance of surgical proficiency and assistant training. Obstacles such as instrument grip strength and blood clot formation were highlighted, and suggestions for future advancements were proposed. RASPN presents an exciting opportunity to enhance precision; however, ongoing research and optimization are necessary to fully harness its benefits.

Evaluation of the suitability of using ArtiSential in various renal surgery: IDEAL stage 1 study

BACKGROUND

ArtiSential, a new articulating laparoscopic instruments, addresses the limited movement associated with conventional laparoscopic instruments. This study was conducted to assess the clinical effectiveness of ArtiSential in detailed steps of various renal surgery.

METHODS

This study was approved by the Institutional Review Board of our institution and registered on the Clinical Research Information Service site of the Korea Disease Control and Prevention Agency. Participants meeting all inclusion and exclusion criteria were included in the clinical trial and underwent renal surgery. The clinical effectiveness of ArtiSential was assessed in terms of the feasibility and objective and subjective parameters across 9 detailed steps.

RESULTS

Of the 15 potential candidates enrolled from October 2021 to November 2021, 1 patient dropped out due to anaphylaxis from an anesthetic agent, and 14 patients underwent laparoscopic surgery using ArtiSential. Of the 14 patients, 2 patients were converted to laparoscopic surgery using straight-shaped instruments due to the ischemia time exceeding 30 min, and 1 patient due to excessive bleeding. The feasibility for most steps was more than 90%, except the renorrhaphy step. The median total operation time and ischemia time were 161 and 23 min, respectively. The median estimated blood loss was 58.5 mL. Two cases of venous injury occurred during renal pedicle dissection step. The accuracy of the procedure judged by reviewers and usability judged by the operator were acceptable in all steps. The surgeon's quantitatively measured stress score was the highest during renorrhaphy step.

CONCLUSIONS

Laparoscopic surgery using ArtiSential is feasible for most steps except the renorrhaphy step. The difficulty of performing renorrhaphy is attributed to prolonged ischemia time, which could be addressed by overcoming the learning curve.

TRIAL REGISTRATION

Clinical Research Information Service site of the Korea Disease Control and Prevention Agency, KCT0006532. Registered 03/09/2021, https://cris.nih.go.kr/cris/search/detailSearch.do?seq=24071 .

Summarizing the evidence for robotic-assisted bladder neck reconstruction: Systematic review of patency and incontinence outcomes

Objective

Bladder neck contracture and vesicourethral anastomotic stenosis are difficult to manage endoscopically, and open repair is associated with high rates of incontinence. In recent years, there have been increasing reports of robotic-assisted bladder neck reconstruction in the literature. However, existing studies are small, heterogeneous case series. The objective of this study was to perform a systematic review of robotic-assisted bladder neck reconstruction to better evaluate patency and incontinence outcomes.

Methods

We performed a systematic review of PubMed from first available date to May 2023 for all studies evaluating robotic-assisted reconstructive surgery of the bladder neck in adult men. Articles in non-English, author replies, editorials, pediatric-based studies, and reviews were excluded. Outcomes of interest were patency and incontinence rates, which were pooled when appropriate.

Results

After identifying 158 articles on initial search, we included only ten studies that fit all aforementioned criteria for robotic-assisted bladder neck reconstruction. All were case series published from March 2018 to March 2022 ranging from six to 32 men, with the median follow-up of 5-23 months. A total of 119 patients were included in our analysis. A variety of etiologies and surgical techniques were described. Patency rates ranged from 50% to 100%, and pooled patency was 80% (95/119). De novo incontinence rates ranged from 0% to 33%, and pooled incontinence was 17% (8/47). Our findings were limited by small sample sizes, relatively short follow-ups, and heterogeneity between studies.

Conclusion

Despite limitations, current available evidence suggests comparable patency outcomes and improved incontinence outcomes for robotic bladder neck reconstruction compared to open repair. Additional prospective studies with longer-term follow-ups are needed to confirm these findings.

Robotic urologic surgery using the KangDuo-Surgical Robot-01 system: A single-center prospective analysis

BACKGROUND

The KangDuo-Surgical Robot-01 (KD-SR-01) system is a new surgical robot recently developed in China. The aim of this study was to present our single-center experience and mid-term outcomes of urological procedures using the KD-SR-01 system.

METHODS

From August 2020 to April 2023, consecutive urologic procedures were performed at Peking University First Hospital using the KD-SR-01 system. The clinical features, perioperative data, and follow-up outcomes were prospectively collected and analyzed.

RESULTS

A total of 110 consecutive patients were recruited. Among these patients, 28 underwent partial nephrectomy (PN), 41 underwent urinary tract reconstruction (26 underwent pyeloplasty, 3 underwent ureteral reconstruction and 12 underwent ureterovesical reimplantation [UR]), and 41 underwent radical prostatectomy (RP). The median operative time for PN was 112.5 min, 157.0 min for pyeloplasty, 151.0 min for ureteral reconstruction, 142.5 min for UR, and 138.0 min for RP. The median intraoperative blood loss was 10 mL for PN, 10 mL for pyeloplasty, 30 mL for ureteral reconstruction, 20 mL for UR, and 50 mL for RP. All procedures were successfully completed without conversion, and there were no major complications in any patient. The median warm ischemia time of PN was 17.3 min, and positive surgical margin was not noted in any patient. The overall positive surgical margin rate of RP was 39% (16/41), and no biochemical recurrence was observed in any RP patient during the median follow-up of 11.0 months. The surgical success rates of pyeloplasty and UR were 96% (25/26) and 92% (11/12) during the median follow-up of 29.5 months and 11.5 months, respectively.

CONCLUSION

The KD-SR-01 system appears feasible, safe, and effective for most urological procedures, based on our single-center experience.

What credentials are required for robotic-assisted surgery in reconstructive and functional urology?

Introduction

The increasing popularity of robotic assisted surgery (RAS) as it is implemented in to sub specialities poses many challenges to ensuring standards in quality and safety. The area of Reconstructive and Functional Urology (RFU) has a wide range and largely complex heterogeneous procedures. In recent years RFU has started to incorporate RAS as the primary method to undertake these procedures due to improved vision, dexterity, and access to deep cavities. To ensure patient safety majority of institutions maintain minimal requirements to operate using RAS however across specialities and institutions these greatly vary.

Methods

A narrative review of all the relevant papers known to the author was conducted.

Results

Specific challenges facing RFU is the inability to rely on case numbers as a surrogate means to measure competency as well the ongoing consideration of how to differentiate between surgeons with robotic training and those with the clinical experience specific to RFU.

Conclusion

This review explores current models of training and credentialling and assess how it can be adapted to suggest a standardised guideline for RFU to ensure the highest standards of patient care.

Contemporary Outcomes of Surgery for Primary and Recurrent Genitourinary Fistulae in a Well-resourced Country

Background

Urinary fistula (UF) is a global health problem but less common in well-resourced countries. Over the past decade there has been a trend toward managing UF in dedicated centres. Most of the evidence for surgical treatment is from individual case series, with few publications that involve high numbers. We describe the repair of recurrent and complex UF cases and outcomes in a tertiary referral setting.

Objective

To describe UF aetiology, repair techniques, and outcomes.

Design setting and participants

This is a retrospective study of a series of patients undergoing UF repair at a specialist unit.

Outcome measurements and statistical analysis

We describe the aetiology, cure rate, complications, and postoperative urinary incontinence rates for the series of UF cases.

Results and limitations

A consecutive series of 98 patients was identified, all of whom were tertiary referrals. Of these, 31 (31.6%) had at least one prior attempt at repair at another centre. The median age was 48 yr (interquartile range [IQR] 40-60.25). The median time from occurrence to repair was 12 mo (IQR 6-12). UF occurred most commonly following hysterectomy (48.0%), Caesarean section (9.2%), other gynaecological surgery (7.1%), and anti-incontinence surgery (7.1%). Complex fistulae (eg, repeat cases, radiation, ureteric involvement) comprised 41 of the cases (41.8%). Most patients with vesicovaginal fistula underwent repair via a transabdominal approach (70.4%). Tissue interposition was used in 96 cases (98%). There were no Clavien-Dindo grade >3 complications. Two patients (2%) had a persistent UF postoperatively. Two patients (2%) developed recurrence more than 2 yr after their initial repair, and both were successfully repaired at our centre. Twelve patients (12.3%) developed de novo overactive bladder, 22 (22.5%) developed stress urinary incontinence (13 had subsequent incontinence surgery), and two (2%) developed bladder pain (both had a subsequent cystectomy).

Conclusions

Despite a high rate of recurrent and complex UF, successful lasting closure was achieved in 96% of our cases. A minority of patients developed other problems such as de novo overactive bladder and stress urinary incontinence that may require further treatment.

Patient summary

Urinary fistula is an abnormal opening or connection in the urinary tract and is less common in well-resourced countries. As a consequence, management of this condition is more frequently undertaken at specialist units. Even patients with a complex fistula and those who have had multiple attempts at repair can experience a cure. Urinary leakage is a common complication after the operation but can be successfully managed with surgery.

The emerging role of robotics in upper and lower urinary tract reconstruction

PURPOSE OF REVIEW

Developments in robotic reconstructive urology have introduced novel treatments for complex upper and lower urinary tract disease. Short-term and mid-term data demonstrates excellent outcomes and minimal morbidity, suggesting the advanced instrumentation and visualization of robotics represent a new treatment paradigm in patients that are historically difficult to treat. Here we review recent developments in the robotically assisted surgical management of urethral and ureteral strictures.

RECENT FINDINGS

The minimally invasive approach, enhanced precision and reach, and near-infrared fluorescence imaging capabilities of robotic platforms have proven to be valuable additions in reconstructive urology where perfusion is often compromised, or anatomy is distorted. These benefits are leveraged heavily in recent descriptions of robotic-assisted posterior urethroplasty and ureteroplasty. Short-term to mid-term follow-up data for these procedures show excellent patency rates with low morbidity and complication rates when compared with open approaches. Long-term data for these procedures are not yet available.

SUMMARY

The role of robotics in reconstructive urology is being actively investigated. Initial findings demonstrate excellent results with low morbidity in the treatment of upper and lower urinary tract disease. Long-term data will ultimately determine the role of robotics in the reconstructive armamentarium.

Robotic-assisted excision of a juxta renal retroperitoneal schwannoma

Retroperitoneal schwannoma is a rare benign tumor of the peripheral nerve Schwann sheath. We, herein, report the case of a 74-year-old woman who presented with vague abdominal pain. Computed tomography imaging revealed a retroperitoneal mass that is medial to the right kidney. The patient underwent robotic excision of the tumor with the pathology revealing schwannoma. We report this case due to the scarcity of this disease entity, especially at this location and to emphasize the indication and value of robotic technology in different pathological processes retroperitoneally.