European Association of Endoscopic Surgeons (EAES) consensus statement on the use of robotics in general surgery

Advancing minimally invasive hepato-pancreato-biliary surgery: barriers to adoption and equitable access

BACKGROUND

Despite a growing body of literature supporting the safety of robotic hepatopancreatobiliary (HPB) procedures, the adoption of minimally invasive techniques in HPB surgery has been slow compared to other specialties. We aimed to identify barriers to implementing robotic assisted surgery (RAS) in HPB and present a framework that highlights opportunities to improve adoption.

METHODS

A modified nominal group technique guided by a 13-question framework was utilized. The meeting session was guided by senior authors, and field notes were also collected. Results were reviewed and free text responses were analyzed for major themes. A follow-up priority setting survey was distributed to all participants based on meeting results.

RESULTS

Twenty three surgeons with varying robotic HPB experience from different practice settings participated in the discussion. The majority of surgeons identified operating room efficiency, having a dedicated operating room team, and the overall hospital culture and openness to innovation as important facilitators of implementing a RAS program. In contrast, cost, capacity building, disparities/risk of regionalization, lack of evidence, and time/effort were identified as the most significant barriers. When asked to prioritize the most important issues to be addressed, participants noted access and availability of the robot as the most important issue, followed by institutional support, cost, quality of supporting evidence, and need for robotic training.

CONCLUSIONS

This study reports surgeons' perceptions of major barriers to equitable access and increased implementation of robotic HPB surgery. To overcome such barriers, defining key resources, adopting innovative solutions, and developing better methods of collecting long term data should be the top priorities.

Advancing minimally invasive hepato-pancreato-biliary surgery: ensuring safety with implementation

BACKGROUND

Although minimally invasive hepato-pancreato-biliary (MIS HPB) surgery can be performed with good outcomes, there are currently no standardized requirements for centers or surgeons who wish to implement MIS HPB surgery. The aim of this study was to create a consensus statement regarding safe dissemination and implementation of MIS HPB surgical programs.

METHODS

Sixteen key questions regarding safety in MIS HPB surgery were generated after a focused literature search and iterative review by three field experts. Participants for the working group were then selected using sequential purposive sampling and snowball techniques. Review of the 16 questions took place over a single 2-h meeting. The senior author facilitated the session, and a modified nominal group technique was used.

RESULTS

Twenty three surgeons were in attendance. All participants agreed or strongly agreed that formal guidelines should exist for both institutions and individual surgeons interested in implementing MIS HPB surgery and that routine monitoring and reporting of institutional and surgeon technical outcomes should be performed. Regarding volume cutoffs, most participants (91%) agreed or strongly agreed that a minimum annual institutional volume cutoff for complex MIS HPB surgery, such as major hepatectomy or pancreaticoduodenectomy, should exist. A smaller proportion (74%) agreed or strongly agreed that a minimum annual surgeon volume requirement should exist. The majority of participants agreed or strongly agreed that surgeons were responsible for defining (100%) and enforcing (78%) guidelines to ensure the overall safety of MIS HPB programs. Finally, formal MIS HPB training, minimum case volume requirements, institutional support and infrastructure, and mandatory collection of outcomes data were all recognized as important aspects of safe implementation of MIS HPB surgery.

CONCLUSIONS

Safe implementation of MIS HPB surgery requires a thoughtful process that incorporates structured training, sufficient volume and expertise, a proper institutional ecosystem, and monitoring of outcomes.

European Robotic Surgery Consensus (ERSC): Protocol for the development of a consensus in robotic training for gastrointestinal surgery trainees

BACKGROUND

The rapid adoption of robotic surgical systems across Europe has led to a critical gap in training and credentialing for gastrointestinal (GI) surgeons. Currently, there is no existing standardised curriculum to guide robotic training, assessment and certification for GI trainees. This manuscript describes the protocol to achieve a pan-European consensus on the essential components of a comprehensive training programme for GI robotic surgery through a five-stage process.

METHODS AND ANALYSIS

In Stage 1, a Steering Committee, consisting of international experts, trainees and educationalists, has been established to lead and coordinate the consensus development process. In Stage 2, a systematic review of existing multi-specialty robotic training curricula will be performed to inform the formulation of key position statements. In Stage 3, a comprehensive survey will be disseminated across Europe to capture the current state of robotic training and identify potential challenges and opportunities for improvement. In Stage 4, an international panel of GI surgeons, trainees, and robotic theatre staff will participate in a three-round Delphi process, seeking ≥ 70% agreement on crucial aspects of the training curriculum. Industry and patient representatives will be involved as external advisors throughout this process. In Stage 5, the robotic training curriculum for GI trainees will be finalised in a dedicated consensus meeting, culminating in the production of an Explanation and Elaboration (E&E) document.

REGISTRATION DETAILS

The study protocol has been registered on the Open Science Framework (https://osf.io/br87d/).

Is implementation of robotic-assisted procedures in acute care general surgery cost-effective?

Over the past 2 decades, the use and importance of robotic surgery in minimally invasive surgery has increased. Across various surgical specialties, robotic technology has gained popularity through its use of 3D visualization, optimal ergonomic positioning, and precise instrument manipulation. This growing interest has also been seen in acute care surgery, where laparoscopic procedures are used more frequently. Despite the growing popularity of robotic surgery in the acute care surgical realm, there is very little research on the utility of robotics regarding its effects on health outcomes and cost-effectiveness. The current literature indicates some value in utilizing robotic technology in specific urgent procedures, such as cholecystectomies and incarcerated hernia repairs; however, the high cost of robotic surgery was found to be a potential barrier to its widespread use in acute care surgery. This narrative literature review aims to determine the cost-effectiveness of robotic-assisted surgery (RAS) in surgical procedures that are often done in urgent settings: cholecystectomies, inguinal hernia repair, ventral hernia repair, and appendectomies.

Assessment and application of non-technical skills in robotic-assisted surgery: a systematic review

BACKGROUND

Undeniably, robotic-assisted surgery (RAS) has become very popular in recent decades, but it has introduced challenges to the workflow of the surgical team. Non-technical skills (NTS) have received less emphasis than technical skills in training and assessment. The systematic review aimed to update the evidence on the role of NTS in robotic surgery, specifically focusing on evaluating assessment tools and their utilisation in training and surgical education in robotic surgery.

METHODS

A systematic literature search of PubMed, PsycINFO, MEDLINE, and EMBASE was conducted to identify primary articles on NTS in RAS. Messick's validity framework and the Modified Medical Education Research Study Quality Instrument were utilised to evaluate the quality of the validity evidence of the abstracted articles.

RESULTS

Seventeen studies were eligible for the final analysis. Communication, environmental factors, anticipation and teamwork were key NTS for RAS. Team-related factors such as ambient noise and chatter, inconveniences due to repeated requests during the procedure and constraints due to poor design of the operating room may harm patient safety during RAS. Three novel rater-based scoring systems and one sensor-based method for assessing NTS in RAS were identified. Anticipation by the team to predict and execute the next move before an explicit verbal command improved the surgeon's situational awareness.

CONCLUSION

This systematic review highlighted the paucity of reporting on non-technical skills in robotic surgery with only three bespoke objective assessment tools being identified. Communication, environmental factors, anticipation, and teamwork are the key non-technical skills reported in robotic surgery, and further research is required to investigate their benefits to improve patient safety during robotic surgery.

Gallbladder cancer: surgical treatment, immunotherapy, and targeted therapy

Gallbladder cancer is a common type of biliary tract tumor. Optimal management for early stage cases typically involves radical excision as the primary treatment modality. Various surgical techniques, including laparoscopic, robotic, and navigational surgery, have demonstrated favorable clinical outcomes in radical gallbladder excision. Unfortunately, most patients are ineligible for surgical intervention because of the advanced stage of the disease upon diagnosis. Consequently, non-surgical interventions, such as chemotherapy, radiotherapy, immunotherapy, and targeted therapy, have become the mainstay of treatment for patients in advanced stages. This review focuses on elucidating various surgical techniques as well as advancements in immunotherapy and targeted therapy in the context of recent advancements in gallbladder cancer research.

Comparing robotic and open surgical techniques in gallbladder cancer management: a detailed systematic review and meta-analysis

This meta-analysis aims to evaluate the safety and oncological outcomes of robotic surgery compared to open surgery in treating gallbladder cancer (GBC). In October 2023, we performed a literature search across major global databases such as PubMed, Embase, and the Cochrane Library. We employed a Review Manager for parameter comparisons. This study has been registered with PROSPERO under the identifier CRD42023476686. Our final meta-analysis incorporated 5 cohort studies, encompassing a total of 353 patients. Compared to the Open Group (OG), the Robotic Group (RG) had reduced intraoperative blood loss (WMD - 217.72 ml, 95% CI - 371.08 to - 64.35; p = 0.005), shorter hospital stay (WMD - 1.80 days, 95% CI - 2.66 to - 0.95; p < 0.0001), and fewer overall complications (OR 0.31, 95% CI 0.10-0.97; p = 0.04). However, there was no significant difference between the two groups in terms of operation duration, postoperative inpatient days, readmission rate, major complications, 1-year postoperative survival, 2-year postoperative survival, and mortality rates. In our study, we found that for patients with gallbladder cancer, robotic radical cholecystectomy offers certain potential advantages over open radical cholecystectomy. This suggests that robotic radical cholecystectomy might be the optimal choice for treating gallbladder cancer. However, further validation from high-quality randomized clinical trials is required.

Evaluation of objective tools and artificial intelligence in robotic surgery technical skills assessment: a systematic review

BACKGROUND

There is a need to standardize training in robotic surgery, including objective assessment for accreditation. This systematic review aimed to identify objective tools for technical skills assessment, providing evaluation statuses to guide research and inform implementation into training curricula.

METHODS

A systematic literature search was conducted in accordance with the PRISMA guidelines. Ovid Embase/Medline, PubMed and Web of Science were searched. Inclusion criterion: robotic surgery technical skills tools. Exclusion criteria: non-technical, laparoscopy or open skills only. Manual tools and automated performance metrics (APMs) were analysed using Messick's concept of validity and the Oxford Centre of Evidence-Based Medicine (OCEBM) Levels of Evidence and Recommendation (LoR). A bespoke tool analysed artificial intelligence (AI) studies. The Modified Downs-Black checklist was used to assess risk of bias.

RESULTS

Two hundred and forty-seven studies were analysed, identifying: 8 global rating scales, 26 procedure-/task-specific tools, 3 main error-based methods, 10 simulators, 28 studies analysing APMs and 53 AI studies. Global Evaluative Assessment of Robotic Skills and the da Vinci Skills Simulator were the most evaluated tools at LoR 1 (OCEBM). Three procedure-specific tools, 3 error-based methods and 1 non-simulator APMs reached LoR 2. AI models estimated outcomes (skill or clinical), demonstrating superior accuracy rates in the laboratory with 60 per cent of methods reporting accuracies over 90 per cent, compared to real surgery ranging from 67 to 100 per cent.

CONCLUSIONS

Manual and automated assessment tools for robotic surgery are not well validated and require further evaluation before use in accreditation processes.PROSPERO: registration ID CRD42022304901.

Sensory substitution increases robotic surgical performance and sets the ground for a mediating role of the sense of embodiment: a systematic review

Sensory Substitution (SS) allows the elaboration of information via non preferential sensory modalities. This phenomenon occurs in robotic-assisted surgery (RAS), in which haptic feedback is lacking. It has been suggested that SS could sustain surgeons' proficiency by means of visual clues for inferring tactile information, that also promotes the feeling of haptic phantom sensations. A critical role in reaching a good performance in procedural tasks is also sustained by the Sense of Embodiment (SE), that is, the capacity to integrate objects into subjective bodily self-representation. As SE is enhanced by haptic sensations, we hypothesize a role of SS in promoting SE in RAS. Accordingly, the goal of this systematic review is to summarize the evidence pertaining the study of SS in RAS in order to highlight the impact on the performance, and to identify a mediating role of the SE in increasing dexterity in RAS. Eight studies selected from the MEDLINE and Scopus® databases met inclusion criteria for a qualitative synthesis. Results indicated that haptic to other modalities SS enhanced force consistency and accuracy, and decreased surgeon fatigue. Expert surgeons, as compared to novices, showed a better natural SS processing, testified by a proficient performance with and without SS aids. No studies investigated the mediating role of SE. These findings indicate that SS is subjected to learning and memory processes that help surgeons to rapidly derive haptic-correlates from visual clues, which are highly required for a good performance. Also, the higher ability of doing SS and the associated perception of haptic sensations might increase multisensory integration, which might sustain performance.

Comparison of robotic-assisted versus conventional laparoscopic surgery in colorectal cancer resection: a systemic review and meta-analysis of randomized controlled trials

Introduction

There is still controversy on whether or not robot-assisted colorectal surgery (RACS) have advantages over laparoscopic-assisted colorectal surgery(LACS).

Materials and methods

The four databases (PubMed, Embase, Web of Science and Cochrane Library)were comprehensively searched for randomized controlled trials (RCTs) comparing the outcomes of RACS and LACS in the treatment of colorectal cancer from inception to 22 July 2023.

Results

Eleven RCTs were considered eligible for the meta-analysis. Compared with LACS,RACS has significantly longer operation time(MD=5.19,95%CI: 18.00,39.82, P<0.00001), but shorter hospital stay(MD=2.97,95%CI:-1.60,-0.33,P = 0.003),lower conversion rate(RR=3.62,95%CI:0.40,0.76,P = 0.0003), lower complication rate(RR=3.31,95%CI:0.64,0.89,P=0.0009),fewer blood loss(MD=2.71,95%CI:-33.24,-5.35,P = 0.007),lower reoperation rate(RR=2.12, 95%CI:0.33,0.96,P=0.03)and longer distal resection margin(MD=2.16, 95%CI:0.04,0.94, P = 0.03). There was no significantly difference in harvested lymph nodes, the time of first flatus, the time of first defecation,the time of first resume diet, proximal resection margin, readmission rates, mortalities and CRM+ rates between two group.

Conclusions

Our study indicated that RACS is a feasible and safe technique that can achieve better surgical efficacy compared with LACS in terms of short-term outcomes.

Systematic review registration

https://www.crd.york.ac.uk/prospero/, identifier CRD42023447088.

A propensity score matched analysis of robotic and open hepatectomy for treatment of liver tumors. Clinical outcomes, oncological survival, and costs comparison

Minimally invasive robotic hepatectomy is gaining popularity with a faster rate of adoption when compared to laparoscopic approach. Technical advantages brought by the robotic surgical system facilitate a transition from open to minimally invasive technique in hepatic surgery. Published matched data examining the results of robotic hepatectomy using the open approach as a benchmark are still limited. We aimed to compare the clinical outcomes, survival, and costs between robotic and open hepatectomy undertaken in our tertiary hepatobiliary center. With IRB approval, we prospectively followed 285 consecutive patients undergoing hepatectomy for neoplastic liver diseases between 2012 and 2020. Propensity score matched comparison of robotic and open hepatectomy was conducted by 1:1 ratio. Data are presented as median (mean ± SD). The matching process assigned 49 patients to each arm, open and robotic hepatectomy. There were no differences in R1 resection rates (4% vs 4%; p = 1.00). Differences in perioperative variables between open and robotic hepatectomy included postoperative complications (16% vs 2%; p = 0.02) and length of stay (LOS) [6 (7 ± 5.0) vs 4 (5 ± 4.0) days; p = 0.002]. There were no differences between open and robotic hepatectomy regarding postoperative hepatic insufficiency (10% vs 2%; p = 0.20). No difference was seen in long-term survival outcomes. While there were no differences in costs, robotic hepatectomy was associated with lower reimbursement [$20,432 (39,191 ± 41,467.81) vs $33,190 (67,860 ± 87,707.81); p = 0.04] and lower contribution margin [$-11,229 (3902 ± 42,572.43) vs $8768 (34,690 ± 89,759.56); p = 0.03]. Compared to open approach, robotic hepatectomy robotic offers lower rates of postoperative complications, shorter LOS and similar costs, while not compromising long-term oncological outcomes. Robotic hepatectomy may eventually become the preferred approach in minimally invasive treatment of liver tumors.

Analysis of the Impact of the Learning Curve on the Safety Outcome of the Totally Robotic-Assisted Biliopancreatic Diversion with Duodenal Switch: a Single-Institution Observational Study

INTRODUCTION

Totally robotic-assisted biliopancreatic diversion with duodenal switch (BPD/DS) learning curve has been described to be longer at approximately 50 cases, at which point operative time and complications rate decrease and tend to stabilize. This study aimed to form an analysis of the impact of the learning curve on the safety outcomes of the totally robotic-assisted BPD/DS.

METHODS

A retrospective review of patients who underwent primary totally robotic-assisted BPD/DS by one of our certified bariatric and metabolic surgeon member of our institution was performed. The patients were classified into two groups, the learning stage group (first 50 cases) and the mastery stage group. Differences in operative time in minutes and postoperative outcomes were analyzed.

RESULTS

Two hundred seventy-six patients were included. The operative time and the postoperative length of stay were significantly higher in the learning stage group (173.8 ± 35.8 min vs. 139.2 ± 30.2 min, p= 0.0001; 3.4 ± 1.4 days vs. 2.6 ± 0.9 days, p= 0.0002). The overall leakage rate was significantly higher in the learning stage group (8% vs. 0.4%, p= 0.0001). The global rate of complications for the learning stage group was 14%, and for the mastery stage group was 6.6% (p= 0.08).

CONCLUSIONS

After the first 50 cases, the operative time, the length of stay, and the overall rate of complications decreased, being especially significant the decrease in the duodeno-ileal anastomosis leakage rate after reaching the learning curve.

Utilising an accelerated Delphi process to develop consensus on the requirement and components of a pre-procedural core robotic surgery curriculum

Robot-assisted surgery (RAS) continues to grow globally. Despite this, in the UK and Ireland, it is estimated that over 70% of surgical trainees across all specialities have no access to robot-assisted surgical training (RAST). This study aimed to provide educational stakeholders guidance on a pre-procedural core robotic surgery curriculum (PPCRC) from the perspective of the end user; the surgical trainee. The study was conducted in four Phases: P1: a steering group was formed to review current literature and summarise the evidence, P2: Pan-Specialty Trainee Panel Virtual Classroom Discussion, P3: Accelerated Delphi Process and P4: Formulation of Recommendations. Forty-three surgeons in training representing all surgical specialties and training levels contributed to the three round Delphi process. Additions to the second- and third-round surveys were formulated based on the answers and comments from previous rounds. Consensus opinion was defined as ≥ 80% agreement. There was 100% response from all three rounds. The resulting formulated guidance showed good internal consistency, with a Cronbach alpha of > 0.8. There was 97.7% agreement that a standardised PPCRC would be advantageous to training and that, independent of speciality, there should be a common approach (95.5% agreement). Consensus was reached in multiple areas: 1. Experience and Exposure, 2. Access and context, 3. Curriculum Components, 4 Target Groups and Delivery, 5. Objective Metrics, Benchmarking and Assessment. Using the Delphi methodology, we achieved multispecialty consensus among trainees to develop and reach content validation for the requirements and components of a PPCRC. This guidance will benefit from further validation following implementation.

The current status of robotic colorectal surgery training programmes

Robotic-assisted colorectal surgery (RACS) is steadily increasing in popularity with an annual growth in the number of colorectal procedures undertaken robotically. Further upscaling of RACS requires structured and standardised robotic training to safeguard high-quality clinical outcomes. The aims of this systematic review were to assess the structure and assessment metrics of currently established RACS training programmes. A systematic review following Preferred Reporting Items for Systematic Reviews and Meta-analysis guidelines was performed. Searches were performed of the Ovid Medline, Embase and Web of Science databases between 2000 and 27th November 2021 to identify studies reporting on training curricula in RACS. Core components of training programmes and their relevant outcome assessment metrics were extracted. Thirteen studies were identified, with all training programmes designed for the da Vinci platform (Intuitive Surgical, Inc., Sunnyvale, CA, USA). Common elements of multimodal programmes included theoretical knowledge (76.9%), case observation (53.8%), simulation (100%) and proctored training (76.9%). Robotic skills acquisition was assessed primarily during the simulation phase (n = 4, 30.1%) and proctoring phase (n = 10, 76.9%). Performance metrics, consisting of time or assessment scores for VR simulation were only mandated in four (30.1%) studies. Objective assessment following proctored training was variably reported and employed a range of assessment metrics, including direct feedback (n = 3, 23.1%) or video feedback (n = 8, 61.5%). Five (38.4%) training programmes used the Global Assessment Score (GAS) forms. There is a broad consensus on the core multimodal components across current RACS training programmes; however, validated objective assessment is limited and needs to be appropriately standardised to ensure reproducible progression criteria and competency-based metrics are produced to robustly assess progression and competence.

Robotic pancreaticoduodenectomy for pancreatic ductal adenocarcinoma: Analysis of surgical outcomes and long-term prognosis in a high-volume center

BACKGROUND

Robotic pancreaticoduodenectomy (RPD) has been reported to be safe and feasible for patients with pancreatic ductal adenocarcinoma (PDAC) of the pancreatic head. This study aimed to analyze the surgical outcomes and risk factors for poor long-term prognosis of these patients.

METHODS

Data from patients who underwent RPD for PDAC of pancreatic head were retrospectively analyzed. Multivariate Cox regression analysis was used to seek the independent prognostic factors for overall survival (OS), and an online nomogram calculator was developed based on the independent prognostic factors.

RESULTS

Of the 273 patients who met the inclusion criteria, the median operative time was 280.0 minutes, the estimated blood loss was 100.0 mL, the median OS was 23.6 months, and the median recurrence-free survival (RFS) was 14.4 months. Multivariate analysis showed that preoperative carbohydrate antigen 19-9 (CA19-9) [hazard ratio (HR) = 2.607, 95% confidence interval (CI): 1.560-4.354, P < 0.001], lymph node metastasis (HR = 1.429, 95% CI: 1.005-2.034, P = 0.047), tumor moderately (HR = 3.190, 95% CI: 1.813-5.614, P < 0.001) or poorly differentiated (HR = 5.114, 95% CI: 2.839-9.212, P < 0.001), and Clavien-Dindo grade ≥ III (HR = 1.657, 95% CI: 1.079-2.546, P = 0.021) were independent prognostic factors for OS. The concordance index (C-index) of the nomogram constructed based on the above four independent prognostic factors was 0.685 (95% CI: 0.640-0.729), which was significantly higher than that of the AJCC staging (8th edition): 0.541 (95% CI: 0.493-0.589) (P < 0.001).

CONCLUSIONS

This large-scale study indicated that RPD was feasible for PDAC of pancreatic head. Preoperative CA19-9, lymph node metastasis, tumor poorly differentiated, and Clavien-Dindo grade ≥ III were independent prognostic factors for OS. The online nomogram calculator could predict the OS of these patients in a simple and convenient manner.

Multi-Institutional Trends in Gynecological Robotic Surgery in India: A Real-World Scenario

Background Robot-assisted laparoscopic surgery in gynecology has grown exponentially compared to laparoscopic surgery. The probable reasons for the increased uptake of robotics are a shorter learning curve, three-dimensional vision, and increased dexterity compared to laparoscopic surgery, and precise surgery as compared to open surgery. This study compares the time trends of various parameters in robotic gynecological surgery in India over a decade. Material and methods In India, a retrospective analysis of all robot-assisted laparoscopic surgery for gynecologic diseases in five tertiary care hospitals was conducted between July 2011 and June 2021. Data were collected regarding demographic profiles, clinical and disease characteristics, and indications for surgery. Details related to surgery were collected, such as the number of ports, console and docking time, the procedure performed, total operative time, average blood loss, blood transfusion, and length of hospital stay. All the parameters collected were grouped into five years, and a comparison was made between the first five years (2011-2015) and the second five years (2016-2021). Statistical analysis, including descriptive statistics and trend analysis, was performed. Results During the 10 years, the total number of cases included was 1,501, out of which 764 were benign cases and 737 were pre-malignant/malignant cases. The common indications were uterine leiomyoma (31.2%) and carcinoma endometrium (28%). The mean age for benign cases was significantly lower than that for malignant cases (40.84 years and 55.42 years, respectively). Mean blood loss was significantly lower for benign indications (97.48 mL) than for oncological surgery (184.67 mL) and needed fewer transfusions. The mean length of stay (LOS) for benign (2.07 days) and malignant/ pre-malignant cases (2.32 days) and the mean BMI for benign (28.40) and for oncological patients (28.47) were similar in both groups. The docking time reduced significantly in the last five years. Conclusion The current retrospective study demonstrates an increasing uptake of robotic technology in gynecological surgery in India. Of the total cohort of cases, 70.9% of patients underwent gynecological robotic surgery in the last five years. A burst of adaptability happened for malignant cases in 2017 and benign cases in 2018, probably due to the increased availability of robotic platforms and improved awareness of technology and training among medical professionals. The number of cases has grown exponentially over the last five years in both benign and malignant/ pre-malignant scenarios; however, there has been a downward trend in the robotic surgery performed in the previous couple of years due to the uncertainty of the COVID pandemic.

[Surgical Treatment of Esophageal Cancer-New Technologies, Modern Concepts]

Das Ösophaguskarzinom wird in Deutschland meist in spezialisierten Zentren entsprechend den Leitlinien multimodal und interdisziplinär therapiert. In den kommenden Jahren wird die Zentralisierung der Ösophaguschirurgie in Deutschland durch die Festlegung neuer Mindestmengen weiter voranschreiten. Dieser Artikel soll neue Technologien für die chirurgische Therapie des Ösophaguskarzinoms und zudem aktuelle onkologische Konzepte aus der Sicht eines High-volume-Centers vorstellen.

Surgical trainee experience and opinion of robotic surgery in surgical training and vision for the future: a snapshot study of pan-specialty surgical trainees

BACKGROUND

 Robotic surgery is well established across multiple surgical specialities in the United Kingdom (UK) and Republic of Ireland (ROI). We aimed to elucidate current surgical trainee experience of and attitudes to robotic surgery in a surgical training programme across the UK and ROI to determine the future role of robotic surgery in international surgical training programmes. Methods: A pan-specialty trainee cross-sectional study was performed on behalf of the Association of Surgeons in Training (ASiT) using mixed-methodology. Round 1: a digital questionnaire was disseminated to all ASiT members. Round 2: 'live-polling' was performed prior to and following the Robotic Surgery plenary session convened at the ASiT 2020 International Conference (Birmingham). Data analysis was performed using a combination of quantitative and qualitative methods.

RESULTS

 Three hundred and four responses were analysed (n = 244 digital questionnaire, n = 60 live-polling). Overall, 73.8% (n = 180) of trainees would value greater access to robotic surgery training. 73.4% (n = 179) believed that robotic surgery was important for the future of their desired specialty and 77.2% (n = 156) believed it should be incorporated into formal surgical training. Qualitative analysis identified that trainees believe that robotic training should have a formal role in surgical training. Perceived disadvantages of robotic surgery experience in surgical training included expense and the current impact of consultant robotic learning curves on training.

CONCLUSION

 Current surgical trainees desire greater access to robotic surgery in surgical training. Robotic surgery is developing an increasing role in current surgical practice and it is important that it is introduced in a timely, evidence-based fashion to surgical trainees at an appropriate stage of training.

The transferability of laparoscopic and open surgical skills to robotic surgery

BACKGROUND

Within the last decades, robotic surgery has gained popularity. Most robotic surgeons have changed their main surgical activity from open or laparoscopic without prior formal robotic training. With the current practice, it is of great interest to know whether there is a transfer of surgical skills. In visualization, motion scaling, and freedom of motion, robotic surgery resembles open surgery far more than laparoscopic surgery. Therefore, our hypothesis is that open-trained surgeons have more transfer of surgical skills to robotic surgery, compared to surgeons trained in laparoscopy.

METHODS

Thirty-six surgically inexperienced medical students were randomized into three groups for intensive simulation training in an assigned modality: open surgery, laparoscopy, or robot-assisted laparoscopy. The training period was, for all study subjects, followed by performing a robot-assisted bowel anastomosis in a pig model. As surrogate markers of surgical quality, the anastomoses were tested for resistance to pressure, and video recordings of the procedure were evaluated by two blinded expert robotic surgeons, using a global rating scale of robotic operative performance (Global Evaluative Assessment of Robotic Skills (GEARS)).

RESULTS

The mean leak pressure of bowel anastomosis was 36.25 (7.62-64.89) mmHg in the laparoscopic training group and 69.01 (28.02-109.99) mmHg in the open surgery group, and the mean leak pressure for the robotic training group was 108.45 (74.96-141.94) mmHg. The same pattern was found with GEARS as surrogate markers of surgical quality. GEARS score was 15.71 (12.37-19.04) in the laparoscopic training group, 18.14 (14.70-21.58) in the open surgery group, and 22.04 (19.29-24.79) in the robotic training group. In comparison with the laparoscopic training group, the robotic training group had a statistically higher leak pressure (p = 0.0015) and GEARS score (p = 0.0023). No significant difference, for neither leak pressure nor GEARS, between the open and the robotic training group.

CONCLUSION

In our study, training in open surgery was superior to training in laparoscopy when transitioning to robotic surgery in a simulation setting performed by surgically naive study subjects.

[Comparison of robot-assisted and conventional endoscopic surgeries in the Russian Federation. (A systematic review and meta-analysis)]

OBJECTIVE

Comparative assessment of immediate and long-term results of robot-assisted and conventional endoscopic technologies in the Russian Federation.

MATERIAL AND METHODS

Searching for primary trials devoted to robot-assisted (RAE) and traditional video endoscopic (TVE) surgeries in the Russian Federation was carried out in the e-library and CENTRAL Cochrane databases. We used the recommendations of the Center for Expertise and Quality Control of Medical Care (2017, 2019) and the current version of the Cochrane Community Guidelines (2021). These guidelines define the features of meta-analysis of non-randomized comparative studies. Review Manager 5.4 software was used for statistical analysis.

RESULTS

We enrolled 26 Russian-language primary sources (3111 patients) including 1174 (38%) ones in the RAE group and 1937 (62%) patients in the TVE group. There were no randomized controlled trials in the Russian Federation, and all primary studies were non-randomized. We found no significant between-group differences in surgery time, incidence of intraoperative complications, intraoperative blood loss in thoracic surgery, urology and gynecology, conversion rate, postoperative hospital-stay, postoperative morbidity (in abdominal surgery, urology and gynecology), postoperative mortality. We observed slightly lower intraoperative blood loss for RAE in abdominal surgery and lower incidence of postoperative complications in robot-assisted thoracic surgery. These results can be compromised by methodological quality of comparative studies, significant heterogeneity and systematic errors.

CONCLUSION

Currently, we cannot confirm the benefits of robot-assisted technologies, since this approach does not worsen or improve treatment outcomes. Further high-quality studies are needed.

The Effect of Kinesthetic and Artificial Tactile Noise and Variability on Stiffness Perception

Robot-assisted minimally invasive surgeries (RAMIS) have many benefits. A disadvantage, however, is the lack of haptic feedback. Haptic feedback is comprised of kinesthetic and tactile information, and we use both to form stiffness perception. Applying both kinesthetic and tactile feedback can enable more precise feedback than kinesthetic feedback alone. However, during remote surgeries, haptic noises and variations can be present. Therefore, toward designing haptic feedback for RAMIS, it is important to understand the effect of haptic manipulations on stiffness perception. We assessed the effect of two manipulations using stiffness discrimination tasks in which participants received force feedback and artificial skin stretch. In Experiment 1, we added sinusoidal noise to the artificial tactile signal, and found that the noise did not affect participants' stiffness perception or uncertainty. In Experiment 2, we varied either the kinesthetic or the artificial tactile information between consecutive interactions with an object. We found that the both forms of variability did not affect stiffness perception, but kinesthetic variability increased participants' uncertainty. We show that haptic feedback, comprised of force feedback and artificial skin stretch, provides robust haptic information even in the presence of noise and variability, and hence can potentially be both beneficial and viable in RAMIS.

Chirurgische Therapie des Ösophaguskarzinoms – neue Technologien, moderne Konzepte

Das Ösophaguskarzinom wird in Deutschland meist in spezialisierten Zentren entsprechend den Leitlinien multimodal und interdisziplinär therapiert. In den kommenden Jahren wird die Zentralisierung der Ösophaguschirurgie in Deutschland durch die Festlegung neuer Mindestmengen weiter voranschreiten. Dieser Artikel soll neue Technologien für die chirurgische Therapie des Ösophaguskarzinoms und zudem aktuelle onkologische Konzepte aus der Sicht eines High-volume-Centers vorstellen.

National Trends and Perioperative Outcomes of Robotic-assisted Hepatectomy in the USA: A Propensity-score Matched Analysis from the National Cancer Database

BACKGROUND

A paucity of data exists on the national use of robotic hepatectomy. We assessed national trends and perioperative outcomes of robotic hepatectomy in the USA. In addition, factors associated with use of the robotic approach were analyzed.

METHODS

The National Cancer Database (NCDB) was queried for patients undergoing hepatectomy from 2010 to 2016. Patients undergoing total hepatectomy for transplant were excluded. Factors associated with the use of the robotic approach were assessed using logistic regression multivariable analysis. Propensity-score analysis was performed (robotic vs. laparoscopic and robotic vs. open approaches), and perioperative outcomes were compared between the matched groups.

RESULTS

The robotic approach was used in 287 patients (110 hospitals). Utilization of the robotic approach increased significantly on the national level from 0.8% in 2010 to 4.1% in 2016 (P<0.001). The number of hospitals performing a minimum of one robotic hepatectomy per year increased from 8 in 2010 to 35 in 2016. The median hospital length of stay was 4 days (IQR 3-6), 30-day readmission rate was 5%, and 30-day/90-day mortality rates were 3%/4%. Factors associated with using robotic approach were African-American race (95% CI 1.02-2.11), recent year of surgery (95% CI 1.11-1.32), HCC histology (95% CI 1.01-52.03), tumor size (95% CI 0.87-0.96), and early-stage tumor (Stage I-II, 95% CI 1.27-3.99). On propensity-matched analysis, there were no differences between robotic and open approaches (n=184 each group) in 30-day readmission (5% vs. 7%, P=0.651), 30-day mortality (2% vs. 4%, P=0.106), 90-day mortality (3% vs. 7%, P=0.080), or 5-year overall survival (58% vs. 43%, P=0.211). However, the robotic approach was associated with a significantly shorter hospital stay (median: 4 vs. 6 days, P<0.001). There were no differences between matched groups of patients undergoing robotic and laparoscopic approaches (n=182 in each group) in perioperative outcomes or length of hospital stay.

CONCLUSION

National use of robotic-assisted hepatectomy has increased by fivefold over the seven-year study period. It was associated with a shorter hospital length of stay compared to the open approach without compromising perioperative outcomes or survival.

[Surgical treatment of esophageal cancer-New technologies, modern concepts]

In Germany esophageal cancer is mostly treated in specialized centers according to national and international guidelines in a multimodal and interdisciplinary setting. In the next few years centralization of esophageal surgery will continue in Germany due to new national regulations on minimum case volumes. This article highlights new technologies for surgical treatment of esophageal cancer and also depicts the current oncological concepts from the perspective of a high-volume center.

Laparoscopic Versus Robot-Assisted Roux-en-Y Gastric Bypass: A Center of Excellence for the EAC-BC Experience

Background: After the first laparoscopic Roux-en-Y gastric bypass (RYGB) in 1994 by Wittgrove, the introduction of robot-assisted procedures was the next step in the surgical race to reduce invasiveness. This breakthrough allowed us to perform bariatric surgery with less surgical trauma in obese patients with metabolic disorders, producing an exponential increase in procedures performed. Methods: This is a retrospective cohort study of a prospective database for patients who underwent RYGB during a 7-year period through two different approaches, laparoscopic and robotic. The robotic cases were performed by two generations of the da Vinci platform (S and Xi), and three groups were identified and compared (L-RYGB, RYGB-S, and RYGB-Xi). Results: A total of 495 patients underwent RYGB, of which 224 by laparoscopy (45.2%) and 271 by robotic approach (54.7%): 134 RYGB-S and 137 RYGB-Xi. The majority of the patients (71.1%) were females, with a mean age of 46.2 years and a mean body mass index of 44 kg/m2. The mean intraoperative time and intraoperative complication rate were higher in the robotic groups, especially in the RYGB-S group. Postoperative complications were higher in the same group, with a rate of 11.9%, where the main leakage occurred on the upper part of the gastric pouch and not in the hand-sewed robotic anastomosis (7.5%). General mortality was 0.6%. We found no significant differences at 1-year percentage of total weight loss (%TWL); at 2 years, the RYGB-Xi group had the lowest %TWL (25.24 ± 14.54, P ≤ .001). Conclusions: The present study reflects our experience during the robotic bariatric introduction and performance since 2011. Features of the da Vinci S platform along our learning curve may explain a higher complication rate. The patients who have been operated by the RYGB-Xi system had lower complications than the laparoscopic group. The robotic approach did not differ with laparoscopy in terms of weight loss and chronic complications after 24 months of follow-up.

National Trends and Perioperative Outcomes of Robotic-assisted Hepatectomy in the USA: A Propensity-score Matched Analysis from the National Cancer Database

BACKGROUND

A paucity of data exists on the national use of robotic hepatectomy. We assessed national trends and perioperative outcomes of robotic hepatectomy in the USA. In addition, factors associated with use of the robotic approach were analyzed.

METHODS

The National Cancer Database (NCDB) was queried for patients undergoing hepatectomy from 2010 to 2016. Patients undergoing total hepatectomy for transplant were excluded. Factors associated with the use of the robotic approach were assessed using logistic regression multivariable analysis. Propensity-score analysis was performed (robotic vs. laparoscopic and robotic vs. open approaches), and perioperative outcomes were compared between the matched groups.

RESULTS

The robotic approach was used in 287 patients (110 hospitals). Utilization of the robotic approach increased significantly on the national level from 0.8% in 2010 to 4.1% in 2016 (P<0.001). The number of hospitals performing a minimum of one robotic hepatectomy per year increased from 8 in 2010 to 35 in 2016. The median hospital length of stay was 4 days (IQR 3-6), 30-day readmission rate was 5%, and 30-day/90-day mortality rates were 3%/4%. Factors associated with using robotic approach were African-American race (95% CI 1.02-2.11), recent year of surgery (95% CI 1.11-1.32), HCC histology (95% CI 1.01-52.03), tumor size (95% CI 0.87-0.96), and early-stage tumor (Stage I-II, 95% CI 1.27-3.99). On propensity-matched analysis, there were no differences between robotic and open approaches (n=184 each group) in 30-day readmission (5% vs. 7%, P=0.651), 30-day mortality (2% vs. 4%, P=0.106), 90-day mortality (3% vs. 7%, P=0.080), or 5-year overall survival (58% vs. 43%, P=0.211). However, the robotic approach was associated with a significantly shorter hospital stay (median: 4 vs. 6 days, P<0.001). There were no differences between matched groups of patients undergoing robotic and laparoscopic approaches (n=182 in each group) in perioperative outcomes or length of hospital stay.

CONCLUSION

National use of robotic-assisted hepatectomy has increased by fivefold over the seven-year study period. It was associated with a shorter hospital length of stay compared to the open approach without compromising perioperative outcomes or survival.

Initial Experience with Robotic Inguinal Hernia Repair in the Adolescent Population

Purpose: There is no one standard procedure encompassing the needs and differences of the entire pediatric population for inguinal hernia repair (IHR). Several techniques can be used, including open repair, laparoscopic, and robotic-assisted laparoscopic repair. This is a report of a single pediatric hospital's experience performing robotic-assisted IHRs in an adolescent population. Methods: Robotic IHRs performed by the pediatric surgery department were prospectively captured and reviewed. The operation performed was a modified robotic transabdominal preperitoneal approach with ProGrip mesh. Results: Between January 2016 and August 2020, 11 robotic-assisted IHRs occurred. All patients were male, median weight interquartile range (IQR) was 76.6 kg (67.425-90.4 kg) and median age (IQR) was 17 years (17-18.5). All together median (IQR) total operative time was 111 (97.5-126) minutes, median (IQR) total console time was 60 (55.5-75.5) minutes. There were no complications or conversions, with all patients discharged on the day of the operation. Conclusion: This study demonstrates a safe and reliable approach to repairing inguinal hernias using robotics through a small initial case series. Robotic-assisted IHR should be considered a viable technique to optimize the surgical care of adolescents.

Grip Force Control During Virtual Interaction With Deformable and Rigid Objects Via a Haptic Gripper

Most studies of grip force control focus on the manipulation of rigid objects. However, in virtual and teleoperation applications, objects are often elastic in the pinch degree-of-freedom, and are manipulated using a handle that presents haptic feedback to the user. When designing controllers for haptic grippers, it is crucial to understand how grip force is controlled when manipulating rigid and deformable objects. Here, we used a virtual teleoperation setup with a haptic gripper interface to investigate grip force control in virtual environments. Ten participants lifted virtual objects and performed vertical, cyclic motions using a haptic gripper. We manipulated the control signal to the virtual interface, the haptic properties of the gripper, and the visual properties of the virtual objects to test their effect on the grip force control. We found that participants modulated their grip force as a function of the anticipated load force in all of the experimental conditions. The control signal and properties of the haptic gripper, but not the visual properties of the objects, affected the baseline and the extent of the grip force modulation. These results can provide design guidelines for haptic grippers that elicit natural grasping in virtual and bilateral teleoperation applications.

Robotic versus laparoscopic splenectomy: a systematic review of perioperative outcomes

Background

Elective splenectomy has various indications and can be performed open or minimally invasively. Laparoscopic splenectomy (LS) is popular but has limitations. Some studies suggest potential superiority of robotic splenectomy (RS) over LS. As such, we conducted a systematic review to determine whether RS has greater positive perioperative outcomes in comparison to LS in the adult population.

Methods

We searched for studies that reported perioperative outcomes and compared RS to LS in the adult population. Outcome measures were operative time, conversion to open surgery, postoperative complications, mortality, length of stay, blood loss and cost analysis. A simple, unpaired two-tailed student’s t‑test was used to compare outcomes between the RS and LS patient groups.

Results

After full-text analysis of 47 papers, three studies met the inclusion criteria. The studies involved 72 patients (28 in the RS group, 44 in the LS group). RS demonstrated no significantly reduced blood loss in comparison to LS (p = 0.13). RS had no cases converting to open surgery and no postoperative complications in comparison to LS. No significant difference was found between RS and LS with regards to LOS (p = 0.89) and cost benefit (p = 0.74). RS had a higher operative time in comparison to LS which was not statistically significant (p = 0.45).

Conclusion

The RS approach may be associated with lower blood loss and a lower risk of conversions. There was no statistical difference between RS and LS with regards to length of stay (LOS) and cost. RS takes longer to perform in comparison to LS.

Robotic liver surgery: literature review and future perspectives

INTRODUCTION

Minimally invasive liver resections (MILR) have been gaining popularity over the last decades. MILR provides superior peri-operative outcome. Despite these advantages, the penetrance of MILR in the clinical setting has been limited, and it was slowed down, among other factors, also by the laparoscopic technological limitations.

EVIDENCE ACQUISITION

A literature review has been carried out (Pubmed, Embase and Scopus platforms) focusing on the role of robotic surgery in MILR.

EVIDENCE SYNTHESIS

The literature review results are presented and our additional remarks on the topic are discussed.

CONCLUSIONS

Robotic MILR has been helping to expand the penetrance of MIS in liver surgery by making possible increasingly more challenging procedures. Minor resections still represent most of the robotic liver surgery data currently available. Robotic liver surgery is safe and effective, and it shows perioperative outcomes comparable with laparoscopic and open surgery. The oncological efficacy, within the limitations of the current level of evidence (mostly retrospective studies and literature heterogeneity), seems to show promising result. High quality prospective randomized studies, the use of prospective registry data, and multi-institutional efforts are needed.

A study on safe forceps grip force for the intestinal tract using haptic technology

PURPOSE

The present study used haptic technology to determine the safe forceps grip force for preventing organ damage when handling the intestinal tract.

MATERIAL AND METHODS

The small intestines of ten male beagle dogs (weighing 9.5-10 kg) were grasped with the entire forceps for one minute; the small intestines were then pulled out of the forceps and evaluated for damage. The force at which the shaft inside the forceps was pulled to close the tip of the forceps was defined as the grip force. Small intestine damage was classified into macroscopic (serosal defects, hemorrhage, hematomas, grip marks) and microscopic (damage layer to the mucosa, submucosa/muscularis mucosa, inner orbicularis muscle, external longitudinal muscle, serosa/subserosa). Grip marks and damage layer to the serosa/subserosa have been considered as acceptable safety margins when grasping the small intestines of beagle dogs.

RESULTS

The macroscopic findings showed that the maximum grip force that produced a 0% incidence of hemorrhage and hematoma was 15 N. At the microscopic level, the maximum grip force that produced a 0% incidence of external longitudinal muscle injury was 15 N, respectively.

CONCLUSIONS

A grip force of 15 N does not damage the small intestines of beagle dogs.

Trends of robotic-assisted surgery for thyroid, colorectal, stomach and hepatopancreaticobiliary cancer: 10 year Korea trend investigation

BACKGROUND

The current position of robotic surgery in the field of minimally invasive surgery remains ambiguous. We evaluated long-term trends of robotic general surgery and the future direction of its development.

METHODS

Data on robotic cancer surgeries between 2005 and 2014 were retrospectively collected by volunteer institutions in the Republic of Korea. Spearman's correlation and logistic regression analyses were used to compare robotic and laparoscopic surgery trends in general surgery.

RESULTS

The odds that robotic surgery was performed instead of laparoscopic surgery significantly decreased in the fields of colorectal, stomach, and hepato-biliary-pancreatic surgery (odds ratio [OR]: 0.95, 95% confidence interval [CI]: 0.93-0.97; OR: 0.90, 95% CI: 0.88-0.92; and OR: 0.71, 95% CI: 0.65-0.78, respectively), except for thyroid surgery (OR: 1.28, 95% CI: 1.25-1.30). Of the total numbers of each procedure, proportions of robotic intersphincteric resections, abdominoperineal resections, and pylorus-preserving surgery performed significantly increased (r = 0.98, P < .001; r = 0.78, P = .01; and r = 0.86, P = .007, respectively).

CONCLUSIONS

The use of robotic surgery failed to preponderate that of laparoscopic surgery, except for thyroid surgery. Robotic surgery is increasingly preferred for limited fields or complex surgeries, but the use of robotics in simple surgeries has decreased.

Frontiers of Robotic Colonoscopy: A Comprehensive Review of Robotic Colonoscopes and Technologies

Flexible colonoscopy remains the prime mean of screening for colorectal cancer (CRC) and the gold standard of all population-based screening pathways around the world. Almost 60% of CRC deaths could be prevented with screening. However, colonoscopy attendance rates are affected by discomfort, fear of pain and embarrassment or loss of control during the procedure. Moreover, the emergence and global thread of new communicable diseases might seriously affect the functioning of contemporary centres performing gastrointestinal endoscopy. Innovative solutions are needed: artificial intelligence (AI) and physical robotics will drastically contribute for the future of the healthcare services. The translation of robotic technologies from traditional surgery to minimally invasive endoscopic interventions is an emerging field, mainly challenged by the tough requirements for miniaturization. Pioneering approaches for robotic colonoscopy have been reported in the nineties, with the appearance of inchworm-like devices. Since then, robotic colonoscopes with assistive functionalities have become commercially available. Research prototypes promise enhanced accessibility and flexibility for future therapeutic interventions, even via autonomous or robotic-assisted agents, such as robotic capsules. Furthermore, the pairing of such endoscopic systems with AI-enabled image analysis and recognition methods promises enhanced diagnostic yield. By assembling a multidisciplinary team of engineers and endoscopists, the paper aims to provide a contemporary and highly-pictorial critical review for robotic colonoscopes, hence providing clinicians and researchers with a glimpse of the major changes and challenges that lie ahead.

Impact of robotic learning curve on histopathology in rectal cancer: A pooled analysis

BACKGROUND

A beneficial impact of robotic proctectomy on circumferential resection margin (CRM) is expected due to the robot's articulating instruments in the pelvis. There are however concerns about a negative impact on the quality of total mesorectal excision (TME) due to the lack of tactile feedback. The aim of this study was to assess whether surgeons' learning curve impacted CRM and TME quality.

METHODS

In a multicenter study, individual patient data of robotic proctectomy for resectable rectal cancer were pooled. Patients were stratified into two phases of surgeons' learning curve. Cumulative sum (CUSUM) analysis was used to determine the transition from learning phase (LP) to plateau phase (PP), which were compared. CRM was microscopically measured in mm by pathologists. TME quality was classified by pathologists as complete, nearly complete or incomplete. T-test and Chi-squared tests were used to compare continuous and categorical variables, respectively.

RESULTS

235 patients underwent robotic proctectomy by five surgeons. 83 LP patients were comparable to 152 PP patients for age (p = 0.20), gender (67.5% vs. 65.1% males; p = 0.72), BMI (p = 0.82), cancer stage (p = 0.36), neoadjuvant chemoradiation (p = 0.13), distance of tumor from anal verge (5.8 ± 4.4 vs. 5.5 ± 3.3; p = 0.56). CRM did not differ (7.7 ± 11.4 mm vs. 8.4 ± 10.3 mm; p = 0.62). The rate of complete TME quality was significantly improved in PP patients as compared to LP patients (73.5% vs. 92.1%; p < 0.001).

CONCLUSION

While learning had no impact on circumferential resection margins, the quality of TME significantly improved during surgeons' plateau phase as compared to their learning phase.

Insight into the methodology and uptake of EAES guidelines: a qualitative analysis and survey by the EAES Consensus & Guideline Subcommittee

BACKGROUND

Over the past 25 years, the European Association for Endoscopic Surgery (EAES) has been issuing clinical guidance documents to aid surgical practice. We aimed to investigate the awareness and use of such documents among EAES members. Additionally, we conceptually appraised the methodology used in their development in order to propose a bundle of actions for quality improvement and increased penetration of clinical practice guidelines among EAES members.

METHODS

We invited members of EAES to participate in a web-based survey on awareness and use of these documents. Post hoc analyses were performed to identify factors associated with poor awareness/use and the reported reasons for limited use. We further summarized and conceptually analyzed key methodological features of clinical guidance documents published by EAES.

RESULTS

Three distinct consecutive phases of methodological evolvement of clinical guidance documents were evident: a "consensus phase," a "guideline phase," and a "transitional phase". Out of a total of 254 surgeons who completed the survey, 72% percent were aware of EAES guidelines and 47% reported occasional use. Young age and trainee status were associated with poor awareness and use. Restriction by colleagues was the primary reason for limited use in these subgroups.

CONCLUSIONS

The methodology of EAES clinical guidance documents is evolving. Awareness among EAES members is fair, but use is limited. Dissemination actions should be directed to junior surgeons and trainees.

General surgery training in the era of robotic surgery: a qualitative analysis of perceptions from resident and attending surgeons

BACKGROUND

The use of the surgical robot has increased annually since its introduction, especially in general surgery. Despite the tremendous increase in utilization, there are currently no validated curricula to train residents in robotic surgery, and the effects of robotic surgery on general surgery residency training are not well defined. In this study, we aim to explore the perceptions of resident and attending surgeons toward robotic surgery education in general surgery residency training.

METHODS

We performed a qualitative thematic analysis of in-person, one-on-one, semi-structured interviews with general surgery residents and attending surgeons at a large academic health system. Convenient and purposeful sampling was performed in order to ensure diverse demographics, experiences, and opinions were represented. Data were analyzed continuously, and interviews were conducted until thematic saturation was reached, which occurred after 20 residents and seven attendings.

RESULTS

All interviewees agreed that dual consoles are necessary to maximize the teaching potential of the robotic platform, and the importance of simulation and simulators in robotic surgery education is paramount. However, further work to ensure proper access to simulation resources for residents is necessary. While most recognize that bedside-assist skills are essential, most think its educational value plateaus quickly. Lastly, residents believe that earlier exposure to robotic surgery is necessary and that almost every case has a portion that is level-appropriate for residents to perform on the robot.

CONCLUSIONS

As robotic surgery transitions from novelty to ubiquity, the importance of effective general surgery robotic surgery training during residency is paramount. Through in-depth interviews, this study provides examples of effective educational tools and techniques, highlights the importance of simulation, and explores opinions regarding the role of the resident in robotic surgery education. We hope the insights gained from this study can be used to develop and/or refine robotic surgery curricula.

Making the Jump: A Qualitative Analysis on the Transition From Bedside Assistant to Console Surgeon in Robotic Surgery Training

OBJECTIVE

To determine barriers associated with the transition from bedside assistant to console surgeon for general surgery residents in the era of robotic surgery in general surgery training.

DESIGN

Qualitative thematic analysis using one-on-one interviews of general surgery residents and attendings conducted between June 2018 and February 2019.

SETTING

An urban, academic, multihospital general surgery residency program with a robust robotic surgery program.

PARTICIPANTS

Convenient and purposeful sampling was performed to ensure a variety of resident graduate-years and attending subspecialties were represented. Sample size was determined by data saturation, which occurred after 20 resident and 7 attending interviews.

RESULTS

Residents identified the low volume of general surgery robotic cases, the infrequency of exposure to robotic surgery, and attending comfort with robotic surgery (and with teaching on the robot) as potential barriers in the transition from bedside assistant to console surgeon. Residents had to find a replacement bedside assistant in order to be the console surgeon, which was challenging. In addition, residents felt that the current culture surrounding robotic surgery is very hierarchal, limiting their exposure. Attendings' trust in the residents' console skills was a major determining factor in allowing residents on the console.

CONCLUSIONS

Most robotic surgery education curricula are sequential, requiring the resident to progress from bedside assistant to console surgeon. Unfortunately, there are many potential barriers for residents in the transition from bedside assistant to console surgeon. Some barriers apply to general surgery training overall, but are amplified in robotic surgery, while others are unique to robotic surgery education. Recognition of, and rectifying, these barriers may increase resident participation as the console surgeon.

Surgeon-Centered Analysis of Robot-Assisted Needle Driving Under Different Force Feedback Conditions

Robotic assisted minimally invasive surgery (RAMIS) systems present many advantages to the surgeon and patient over open and standard laparoscopic surgery. However, haptic feedback, which is crucial for the success of many surgical procedures, is still an open challenge in RAMIS. Understanding the way that haptic feedback affects performance and learning can be useful in the development of haptic feedback algorithms and teleoperation control systems. In this study, we examined the performance and learning of inexperienced participants under different haptic feedback conditions in a task of surgical needle driving via a soft homogeneous deformable object-an artificial tissue. We designed an experimental setup to characterize their movement trajectories and the forces that they applied on the artificial tissue. Participants first performed the task in an open condition, with a standard surgical needle holder, followed by teleoperation in one of three feedback conditions: (1) no haptic feedback, (2) haptic feedback based on position exchange, and (3) haptic feedback based on direct recording from a force sensor, and then again with the open needle holder. To quantify the effect of different force feedback conditions on the quality of needle driving, we developed novel metrics that assess the kinematics of needle driving and the tissue interaction forces, and we combined our novel metrics with classical metrics. We analyzed the final teleoperated performance in each condition, the improvement during teleoperation, and the aftereffect of teleoperation on the performance when using the open needle driver. We found that there is no significant difference in the final performance and in the aftereffect between the 3 conditions. Only the two conditions with force feedback presented statistically significant improvement during teleoperation in several of the metrics, but when we compared directly between the improvements in the three different feedback conditions none of the effects reached statistical significance. We discuss possible explanations for the relative similarity in performance. We conclude that we developed several new metrics for the quality of surgical needle driving, but even with these detailed metrics, the advantage of state of the art force feedback methods to tasks that require interaction with homogeneous soft tissue is questionable.

Status of Robotic-Assisted Surgery (RAS) in the Department of Defense (DoD)

INTRODUCTION

Since inception of robotic-assisted surgery (RAS) in 1999, there has been an exponential rise in RAS in both number and complexity of surgical cases performed. The majority of these cases are gynecologic surgery in nature, with only a quarter of them labeled as general surgery. The purpose of this study is to determine if RAS in the Department of Defense (DoD) mirrors these trends.

METHODS

A total of 6,204 RAS cases from across the DoD were reviewed between 01 January 2015 and 30 September 2017 from every Military Treatment Facility (MTF) that employs a robotic surgical device (various models of the da Vinci robotic surgical system by Intuitive Surgical). Specialty, number, and surgeon were recorded for each case. These end points were also examined for trends overtime and compared to similar civilian data.

RESULTS

The number of MTFs performing robotic surgery and the number of cases performed increased significantly. An average of 373 cases per quarter-year were performed in 2015, 647 in 2016, and 708 in 2017. The number of RAS cases increased by about 10% every quarter-year during this time period. RAS was most commonly performed by general surgery in 10 of the 14 MTFs examined.

CONCLUSIONS

MTFs implemented RAS much later than the civilian world. However, since its implementation, the frequency of RAS use has increased at a faster rate in the DoD than in the civilian world. Possible reasons for this are a younger pool of surgeons in the military and less demands on cost-effective productivity, allowing these younger surgeons to focus on emerging technology rather than maximizing surgical cost efficiency. General surgery constitutes the majority of RAS cases in the DoD. It is unclear why this difference from the civilian world exists.

Transition effects from laparocscopic to robotic surgery skills in small cavities

Conventional laparoscopic surgery (LS) is being challenged by the ever-increasing use of robotic surgery (RS) to perform reconstructive procedures. The purpose of this study was to assess the acquisition of skills in both techniques and the potential transfer of skills from one technique to the other when restricted spaces are involved. A preclinical randomized crossover study design was implemented. Twelve subjects performed two different reproducible drill procedures: "Thread the Ring" (TR) and "Transfer the Plot" (TP). To assess surgical proficiency in confined workspaces, these exercises were performed with LS and RS technology in a pediatric laparoscopic surgery (PLS) simulator. Each performance was recorded and evaluated by two reviewers using objective structured assessment of technical skills (OSATS). The times to complete the TP and the TR procedure were significantly shorter with RS compared to LS (64 s vs. 319 s; p < 0.0001 for both TP and TR). A significant transfer effect of skills between LS and RS was noted for the TP exercise (p = 0.006). The percentage improvement was greater overall with LS, meaning a higher number of trials were required to adequately master the procedure. This study demonstrated that RS performed significantly better compared to LS on pediatric simulation devices. A transfer effect was identified from LS to RS exclusively. The learning curves showed that progression was definitely longer with LS. These results, indicate that novice surgeons should be encouraged to persist with learning LS, and they support the use of a pediatric robotic simulation device.

Multivisceral robotic liver surgery: feasible and safe

The application of robotic technology allows for the performance of multi-organ liver resections by multidisciplinary teams in a minimally invasive manner. Their technique and outcomes are not established. Herein we describe our technique with robotic liver surgery combined with colon, pancreas and urologic resections. Our patients are an 84-year-old (yo) female (Body Mass Index, BMI: 25) with a recently diagnosed right colon adenocarcinoma and two synchronous liver metastases at segments 5 and 6, a 75-year-old female (BMI: 50.4) with a history of right renal cell cancer status post (s/p) right robotic radical nephrectomy now with tumor recurrence with multiple intra-abdominal masses including a segment 7 liver lesion and a 71-year-old female (BMI: 24) with history of pancreatic ductal adenocarcinoma of the tail and a segment 3 liver lesion s/p neoadjuvant chemotherapy. The Xi robotic system (Intuitive Surgical, Sunnyvale, CA, USA) was utilized in all cases. Port placement in all cases was decided within the multidisciplinary teams to accommodate both the hepatic and the extra-hepatic portion of the operation. Parenchymal transections were performed with the use of the Vessel Sealer and the robotic stapler as appropriate. Indocyanine green (ICG) was used to assess the anastomotic perfusion in the first patient. Blood loss was 50 ml for the first two cases and 300 ml for the third. Surgical margins were negative in all cases. Patients were discharged at POD 8, 3 and 5 with one patient experiencing postoperative ileus. Robotic multivisceral liver resections are feasible and safe within multidisciplinary surgical teams with expertise in robotic surgery. The robotic platform can offer a minimally invasive approach in liver surgery synchronous with colonic, pancreatic and urologic surgery.

International consensus statement on robotic pancreatic surgery

The robotic surgical system has been applied to various types of pancreatic surgery. However, controversies exist regarding a variety of factors including the safety, feasibility, efficacy, and cost-effectiveness of robotic surgery. This study aimed to evaluate the current status of robotic pancreatic surgery and put forth experts' consensus and recommendations to promote its development. Based on the WHO Handbook for Guideline Development, a Consensus Steering Group* and a Consensus Development Group were established to determine the topics, prepare evidence-based documents, and generate recommendations. The GRADE Grid method and Delphi vote were used to formulate the recommendations. A total of 19 topics were analyzed. The first 16 recommendations were generated by GRADE using an evidence-based method (EBM) and focused on the safety, feasibility, indication, techniques, certification of the robotic surgeon, and cost-effectiveness of robotic pancreatic surgery. The remaining three recommendations were based on literature review and expert panel opinion due to insufficient EBM results. Since the current amount of evidence was low/meager as evaluated by the GRADE method, further randomized controlled trials (RCTs) are needed in the future to validate these recommendations.

Robotic Versus Conventional Laparoscopic Surgery for Colorectal Cancer: A Systematic Review and Meta-Analysis with Trial Sequential Analysis

BACKGROUND

Minimally invasive surgery has been considered as an alternative to open surgery by surgeons for colorectal cancer. However, the efficacy and safety profiles of robotic and conventional laparoscopic surgery for colorectal cancer remain unclear in the literature. The primary aim of this review was to determine whether robotic-assisted laparoscopic surgery (RAS) has better clinical outcomes for colorectal cancer patients than conventional laparoscopic surgery (CLS).

METHODS

All randomized clinical trials (RCTs) and observational studies were systematically searched in the databases of CENTRAL, EMBASE and PubMed from their inception until January 2018. Case reports, case series and non-systematic reviews were excluded.

RESULTS

Seventy-three studies (6 RCTs and 67 observational studies) were eligible (n = 169,236) for inclusion in the data synthesis. In comparison with the CLS arm, RAS cohort was associated with a significant reduction in the incidence of conversion to open surgery (ρ < 0.001, I² = 65%; REM: OR 0.40; 95% CI 0.30,0.53), all-cause mortality (ρ < 0.001, I² = 7%; FEM: OR 0.48; 95% CI 0.36,0.64) and wound infection (ρ < 0.001, I² = 0%; FEM: OR 1.24; 95% CI 1.11,1.39). Patients who received RAS had a significantly shorter duration of hospitalization (ρ < 0.001, I² = 94%; REM: MD - 0.77; 95% CI 1.12, - 0.41; day), time to oral diet (ρ < 0.001, I² = 60%; REM: MD - 0.43; 95% CI - 0.64, - 0.21; day) and lesser intraoperative blood loss (ρ = 0.01, I² = 88%; REM: MD - 18.05; 95% CI - 32.24, - 3.85; ml). However, RAS cohort was noted to require a significant longer duration of operative time (ρ < 0.001, I² = 93%; REM: MD 38.19; 95% CI 28.78,47.60; min).

CONCLUSIONS

This meta-analysis suggests that RAS provides better clinical outcomes for colorectal cancer patients as compared to the CLS at the expense of longer duration of operative time. However, the inconclusive trial sequential analysis and an overall low level of evidence in this review warrant future adequately powered RCTs to draw firm conclusion.

Nursing performance in robotic surgeries: integrative review

OBJECTIVE

To know the scientific production on the performance of the nursing staff in robotic surgeries, identifying the role of the nurse in the three perioperative periods.

METHODS

Integrative review, search in the databases National Library of Medicine, National Institutes of Health, Scientific Electronic Library Online and Biblioteca Virtual em Saúde, performed from June to September, 2017; 17 selected articles met the inclusion criteria.

RESULTS

Most articles were published in foreign journals in English, nine in the United States, classified with evidence level of 4 and 5. The role of nursing in the perioperative period was identified, related mainly to patient safety. The most mentioned perioperative period in the articles was the intraoperative, with greater concern in the positioning of the patient.

CONCLUSION

The nursing performance and patient safety in robotic surgeries are similar to the ones in major surgeries, requiring from the patient a specific knowledge on the setting and preparation of the robot.