A case of robot-assisted resection for cecum cancer with anomalous venous confluence

There are many reports on the positional relationship between the ileocolic artery and superior mesenteric vein (SMV). However, there have been no reports of anomalous venous confluence in the ileocecal vessel area. A 69-year-old man was diagnosed with cecal cancer on a preoperative examination of a lung tumor. We planned to perform surgery for the cecal cancer. Computed tomography angiography revealed an anomalous vein confluence in the ileocolic region. We performed robot-assisted ileocecal resection. Although the small intestinal vein was misidentified as the SMV at first, we confirmed the misidentification, identified the SMV on the dorsal side of the ileocolic artery, and ligated the ileocolic vessels with precise forceps manipulation during robotic surgery. Especially for cases with vascular anomalies revealed by preoperative computed tomography angiography, robotic surgery may be useful, as flexible forceps manipulation prevents vascular injury.

Artificial intelligence in head and neck surgery: Potential applications and future perspectives

Artificial intelligence (AI) has the potential to improve the surgical treatment of patients with head and neck cancer. AI algorithms can analyse a wide range of data, including images, voice, molecular expression and raw clinical data. In the field of oncology, there are numerous AI practical applications, including diagnostics and treatment. AI can also develop predictive models to assess prognosis, overall survival, the likelihood of occult metastases, risk of complications and hospital length of stay.

Use of Simulation For Training Advanced Colorectal Procedures

OBJECTIVE

Simulation training for minimally invasive colorectal procedures is in developing stages. This study aims to assess the impact of simulation on procedural knowledge and simulated performance in laparoscopic low anterior resection (LLAR) and robotic right colectomy (RRC).

DESIGN

LLAR and RRC simulation procedures were designed using human cadaveric models. Resident case experience and simulation selfassessments scores for operative ability and knowledge were collected before and after the simulation. Colorectal faculty assessed resident simulation performance using validated assessment scales (OSATS-GRS, GEARS). Paired t-tests, unpaired t-tests, Pearson's correlation, and descriptive statistics were applied in analyses.

SETTING

Barnes-Jewish Hospital/Washington University School of Medicine in St. Louis, Missouri.

PARTICIPANTS

Senior general surgery residents at large academic surgery program.

RESULTS

Fifteen PGY4/PGY5 general surgery residents participated in each simulation. Mean LLAR knowledge score increased overall from 10.0 ±  2.0 to 11.5  ±  1.6 of 15 points (p = 0.0018); when stratified, this increase remained significant for the PGY4 cohort only. Mean confidence in ability to complete LLAR increased overall from 2.0 ±  0.8 to 2.8  ± 0.9 on a 5-point rating scale (p = 0.0013); when stratified, this increase remained significant for the PGY4 cohort only. Mean total OSATS GRS score was 28  ±  6.3 of 35 and had strong positive correlation with previous laparoscopic colorectal experience (r = 0.64, p = 0.0092). Mean RRC knowledge score increased from 9.4 ±  2.2 to 11.1 ±  1.5 of 15 points (p = 0.0030); when stratified, this increase again remained significant for the PGY4 cohort only. Mean confidence in ability to complete RRC increased from 1.9 ±  0.9 to 3.2  ±  1.1 (p = 0.0002) and was significant for both cohorts.

CONCLUSIONS

Surgical trainees require opportunities to practice advanced minimally invasive colorectal procedures. Our simulation approach promotes increased procedural knowledge and resident confidence and offers a safe complement to live operative experience for trainee development. In the future, simulations will target trainees on the earlier part of the learning curve and be paired with live operative assessments to characterize longitudinal skill progression.

Effect of palatine tonsil tumor resection on postoperative velopharyngeal insufficiency in transoral surgery

BACKGROUND

Velopharyngeal insufficiency (VPI) is a known complication of transoral surgery (TOS) for oropharyngeal HPV-mediated squamous cell carcinoma. Controversy exists regarding adequate resection margins for balancing functional and oncologic outcomes.

METHODS

This retrospective study was exempted by the IRB. Patients who underwent TOS from January 2017 to October 2022 were included. Patient characteristics, treatment details, and oncologic and functional outcomes were evaluated.

RESULTS

Fifty-five patients were included. Mean and median follow-up was 34 months. 98% of patients were AJCC stage I/II. Recurrence-free survival was 96% with no local recurrences. Univariate analysis demonstrated an association between VPI and pT stage (p = 0.035), medial pterygoid resection (p = 0.049), and palatal attachment sacrifice (p < 0.001). Multivariate analysis showed sacrifice of the palatal attachments remained a significant risk for VPI (p = 0.009).

CONCLUSION

Loss of soft palate pharyngeal attachments is an independent risk factor for VPI. When oncologically appropriate, the palatal attachments to the pharynx may be preserved.

The Great Debate: Robotic vs Traditional Surgical Approach in the Acute Care Setting

Robotic surgery was first introduced in the 1980s as a system to aid patients in the battlefield. Since then, robotic surgery has become an important minimally invasive tool and plays an important role in elective surgery among various surgical specialties. However, the role for robotic surgery in the emergent setting is not well established or studied. Robotic surgery has been shown to be advantageous to both patients and operating surgeons. Though limited, studies have found robotic surgery in the acute setting to be safe for patients. These studies found robotic surgery to have improved perioperative outcomes when compared to an open or laparoscopic approach. Additionally, the robotic platform is thought to be an effective tool to prevent conversion to open procedures in emergent settings. Although some studies demonstrate advantages to robotic acute surgery, others have shown increased complications with robotic acute surgery or no distinct advantage when comparing robotic to laparoscopic surgery. Additionally, some of the published papers supporting the use of robotic surgery in the emergent setting may have a degree of bias favoring the robotic platform. Robotic surgery is a mainstay in minimally invasive elective surgery and gaining popularity among patients and surgeons. There are pros and cons to the adaptation of the robotic platform in the acute care setting. Additional large population studies are indicated to determine the true role of the robotic platform in the emergent setting.

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.

Incorporating Robotic Cholecystectomy in an Acute Care Surgery Practice Model is Feasible

INTRODUCTION

The role of robotic surgery in the nonelective setting remains poorly defined. Accessibility, patient acuity, and high turn-over may limit its applicability and utilization. The goal is to characterize the role of robotic cholecystectomy (CCY) in a busy acute care surgery (ACS) practice at a quaternary medical center, and compare surgical outcomes and resource utilization between robotic and laparoscopic CCY.

METHODS

Adult patients who underwent robotic (Da Vinci Xi) or laparoscopic CCY between 01/2021-12/2022 by an ACS attending within 1 week of admission were included. Primary outcomes included time from admission to surgery, off hour (weekend and 6p-6a) cases, operation time, and hospital costs, to reflect "feasibility" of robotic compared to laparoscopic CCY. Secondary outcomes encompassed surgery-related outcomes and complications.

RESULTS

The proportion of robotic CCY increased from 5% to 32% within 2 years. In total 361 laparoscopic and 89 robotic CCY were performed. Demographics and gallbladder disease severity were similar. Feasibility measures-operation time, case start time, time from admission to surgery, proportion of off-hour cases, and cost-were comparable between robotic and laparoscopic CCY. There were no differences in surgical complications, common bile duct injury, readmission, or mortality. Conversion to open surgery occurred more often in laparoscopic cases (5% vs 0%, P = .02, OR = 1.05).

DISCUSSION

Robotic CCY is associated with fewer open conversions and otherwise similar outcomes compared to laparoscopic CCY in the non-elective setting. Incorporation of robotic CCY in a busy ACS practice model is feasible with available resources.

First Bite Syndrome in Transoral Surgery for Oropharyngeal Cancer

OBJECTIVE

First bite syndrome (FBS) is a rare complication of transoral surgery (TOS) for oropharyngeal cancer (oropharyngeal squamous cell carcinoma [OPSCC]). Risk factors for developing this complication are not well described. In this study, we attempt to identify risks for developing FBS in TOS.

STUDY DESIGN

Retrospective chart review.

SETTING

Tertiary care medical center.

METHODS

This study was exempted by the Mayo Clinic institutional review board. We performed a review from January 2017 to November 2022 of all patients who underwent TOS for OPSCC by a single provider. Exclusion criteria included less than 6 months follow up, prior treatment of head and neck cancer, or incomplete records. Demographic data, comorbidities, tumor characteristics, surgical details, adjuvant treatment details, functional outcomes, and oncologic outcomes were assessed. Fisher's Exact test and Kruskal-Wallis rank sum test were used to identify significant variables, and multivariable logistic regression was used to address confounding.

RESULTS

One hundred and one patients were identified. Eighty-nine met the inclusion criteria. The mean follow-up was 34 months (median 33). Seven patients (7.9%) developed FBS. Palatine tumor primary (P = .041), resection of styloglossus/stylopharyngeus (P = .039), and parapharyngeal fat manipulation (P = .015) were associated with the presence of FBS. After adjusting for tumor location, manipulation of parapharyngeal fat maintained significance (P = .025). T and N staging, tumor volume, adjuvant radiation, and ligation of lingual/facial arteries were not associated with the development of FBS. Eighty-six percent (6/7) of patients had a resolution of FBS at an average of 11.3 months.

CONCLUSION

Manipulation of the parapharyngeal space is independently associated with developing FBS in TOS in our cohort. Further confirmatory studies are warranted.

"Robot-assisted partial cystectomy for deep infiltrating endometriosis of the bladder with the Hugo RAS system".: PRECIS: Robotic-assisted laparoscopy for bladder endometriosis is a feasible procedure, able to reproduce all surgical steps without critical errors or complications requiring a change in surgical planning

OBJECTIVE

Involvement of the lower urinary tract is found in 0.2-2.5% of all deep infiltrating endometriosis (DIE)1,2. The bladder is the most affected organ with a prevalence of up to 80% of cases3. Patients with bladder endometriosis are often symptomatic (dysuria, hyperactive bladder, recurrent urinary tract infections and hematuria). Surgery is the gold standard treatment for this condition when medical therapy fails1,2. Several studies have shown the feasibility, effectiveness, and safety of the laparoscopic approach4 but data about robotic-assisted approach are missing in literature. Currently, novel platforms are entering the market and the Hugo™RAS(Medtronic, Minneapolis, USA) is a new system(HRS) consisting of an open console with 3D-HD screen and a multi-modular bedside units. Even if some series are already available for radical cystectomies for oncologic purposes5, a full description of DIE surgery performed with HRS is still lacking. Aim of this video-article is to show our technique and surgical setup to carry out a complex case of anterior compartment DIE.

DESIGN

A step-by-step explanation of surgical technique with narrated video footage.

SETTING

Tertiary Level Academic Hospital "IRCCS Azienda Ospedaliero - Universitaria di Bologna" Bologna, Italy.

INTERVENTION

A 36-year-old nulliparous woman affected by DE was referred to our center due to severe dyspareunia, dysuria with hematuria and post-voiding pain not responsive to oral progestins. The preoperative work up consisted of a gynecological examination, pelvic ultrasound and MRI that showed the presence of an endometriotic nodule of the bladder base. All possible therapeutic strategies and related complications have been discussed with the patient before the signature of the informed consent. To carry out the procedure a "straight" port placement in a "compact" docking configuration6 was installed. After developing the paravesical spaces bilaterally, the bladder nodule was approached in a latero-medial direction then a partial cystectomy with macroscopical free margins was performed. A double layer horizontal running suture with barbed thread was used to repair the bladder wall.

CONCLUSION

To the best of our knowledge, this is the first case of bladder endometriotic nodule excision perfomed with HRS. We explained our technique and robotic set-up to successfully manage a compelx case of DIE of the bladder.

Robotic Renal Vein Bypass: A Novel Technique for Treating a Challenging Case of Nutcracker Syndrome

This case report highlights the successful application of a robotic-assisted surgical approach in managing Nutcracker syndrome. The patient, a 36-year-old female presented with severe symptoms and underwent robotic left renal vein transposition after failing conservative management. The procedure was performed through a minimally invasive approach utilizing the Da Vinci robotic system™ which offers enhanced visualization and precision. However, challenges arose during the renal vein anastomosis due to tension and poor flow through the transposition, requiring two revisions with a bovine pericardial patch. Ultimately, an 8 mm ringed PTFE bypass was anastomosed from the distal left renal vein to the Inferior Vena Cava. Despite these challenges, the patient experienced a successful outcome with complete symptom resolution of this complicated pathology.

Lymph node dissection in lung cancer surgery

Lung cancer, a leading cause of cancer-related death, often requires surgical resection for early-stage cases, with recent data supporting less invasive resections for tumors smaller than 2 cm. Central to resection is lymph node assessment, an area of controversy worldwide, compounded by advances in minimally invasive techniques. The review aims to assess current standards for lymph node assessment, recent data from the surgical era, and the immunobiological basis of how lymph node metastases impact patient outcomes. The British Thoracic Society guidelines recommend systematic nodal dissection during lung cancer resection, without specifying node removal or sampling. Historical data on mediastinal lymph node dissection (MLND) survival benefits are inconclusive, although proponents argue for lower recurrence rates. Recent trials such as ACOSOG Z0030 found no survival difference between MLND and nodal sampling, reinforcing the need for robust staging. While lobe-specific dissection strategies have been proposed, they currently lack consensus. JCOG1413 aims to compare the clinical benefits of lobe-specific and systematic dissection. TNM-9 staging revisions emphasize the prognostic significance of single-station N2 involvement. Robotic surgery shows promise, with trials such as RAVAL, which reported comparable outcomes to video-assisted thoracic surgery (VATS) and improved lymph node sampling. Immunobiological insights suggest preserving key immunological sites during lymphadenectomy, especially for patients receiving adjuvant immunotherapy. In conclusion, the standard lymph node resection strategy remains unsettled. The debate between systematic and selective dissection continues, with implications for staging accuracy and patient outcomes. As minimally invasive techniques evolve, robotic surgery emerges as an effective and low-risk approach to delivering optimal lymph node assessment.

Trifecta Outcomes of Robot-Assisted Partial Nephrectomy Using the New Hugo™ RAS System Versus Laparoscopic Partial Nephrectomy

(1) Background: Laparoscopic partial nephrectomy (LPN) is still performed in many referred urological institutions, representing a valid alternative to robot-assisted partial nephrectomy (RAPN). We aimed to compare trifecta outcomes of LPN and RAPN with the Hugo™ RAS System. (2) Methods: Between October 2022 and September 2023, eighty-nine patients underwent minimally invasive partial nephrectomy (group A, RAPN = 27; group B, Laparoscopic PN = 62) for localized renal tumors at our Institution. Continuous variables were presented as median and IQR and compared by means of the Mann-Whitney U test, while categorical variables were presented as frequencies (%) and compared by means of the χ2 test. (3) Results: Group A showed a higher rate of male patients (81.5% vs. 59.7%, p = 0.04) and a higher trend towards larger clinical tumor size (34 vs. 29 mm, p = 0.14). All the other baseline variables were comparable between the two groups (all p > 0.05). Regarding post-operative data, group A displayed a lower operative time (92 vs. 149.5 min, p = 0.005) and a shorter hospital stay (3 vs. 5, p = 0.002). A higher rate of malignant pathology was evidenced in group A (77.8% vs. 58.1%, p = 0.07) as well as a lower trend towards positive surgical margins (3.7% vs. 4.8%, p = 0.82), even if not statistically significant. (4) Conclusions: The rate of trifecta achievement was 92.6% and 82.3% for group A and B (p = 0.10), respectively. In terms of trifecta outcomes, RAPN using the Hugo™ RAS System showed comparable results to LPN performed by the same experienced surgeon.

Effect of Robotic Inferior Mesenteric Artery Ligation Level on Low Anterior Resection Syndrome in Rectum Cancer

Background: Life expectancy of patients with rectal cancer is increasing day by day with innovative treatments. Low anterior resection syndrome (LARS), which disrupts the comfort of life in these patients, has become a serious problem. We aimed to evaluate the effect of high ligation (HL) and low ligation (LL) techniques on LARS in rectal cancer surgery performed with the robotic method. Materials and Methods: The data of patients diagnosed with mid-distal rectal cancer between 2016 and 2021 who underwent robotic low anterior resection by the same team in the same center with neoadjuvant chemoradiotherapy were retrospectively evaluated. Patients were divided into two groups as those who underwent HL and LL procedures. Preoperative, 8 weeks after neoadjuvant treatment, 3 and 12 months after ileostomy closure were evaluated. Results: A total of 84 patients (41 HL, 43 LL) were included in the study. There was no statistically significant difference between the demographic characteristics and pathology data of the patients. Although there was a decrease in LARS scores after neoadjuvant treatment, there was a statistically significant difference between the two groups at 3 and 12 months after ileostomy closure (P: .001, P: .015). Conclusions: In patients who underwent robotic low anterior resection, there is a statistically significant difference in the LARS score in the first 1 year with the LL technique compared with that of the HL technique, and the LL technique has superiority in reducing the development of LARS between the two oncologically indistinguishable methods.

Optical Trocar Access for Retroperitoneal Robotic-Assisted Pyeloplasty in Children with Ureteropelvic Junction Obstruction

Purpose: Retroperitoneal robotic-assisted pyeloplasty (ret-RAP) for ureteropelvic junction obstruction (UPJO) requires a larger retroperitoneal space (RS) to maintain specified distances between robotic (da Vinci) trocars and between trocars and the region of interest. A modified closed technique (MOT) and conventional closed technique (COT) were compared for creating an adequate RS with optical trocars. Methods: RS access in children with UPJO who underwent ret-RAP (n = 30) was MOT (n = 15) and COT (n = 15). All patients were positioned laterally. For MOT, a 5 mm optical trocar was inserted at the angle formed between the 12th rib and the erector spinae muscles. As the trocar was advanced under direct vision, it pierced the superficial subcutaneous layer, Scarpa's fascia, lumbar fascia, internal/external oblique and transversus abdominalis muscles, and the posterior renal fascia. Once in the RS, the tip of the scope was used for blunt dissection of perirenal fat, the tip was withdrawn until it was outside the perirenal fascia, and used to dissect toward the anterior abdomen in the pararenal fat layer. Results: Ages and weights at ret-RAP were similar (MOT: 5.6 ± 1.8 years versus COT: 7.8 ± 4.6 years; MOT: 20.6 ± 10.1 kg versus COT: 27.6 ± 13.9 kg). Times for RS access were similar (MOT: 1.6 ± 0.5 minutes versus COT: 1.9 ± 0.7 minutes), but RS expansion was significantly quicker in MOT (32.3 ± 8.7 minutes versus 52.0 ± 15.1 minutes; P < .001). Peritoneal injury caused carbon dioxide leakage in 4 of 15 COT cases and 0 of 15 MOT cases. Conclusion: RS expansion with MOT was safer because there were no peritoneal injuries and MOT was quicker than COT.

Robotic surgery after total neoadjuvant therapy for rectal cancer: pitfalls of beyond total mesorectal excision for patients with sidewall invasion

AIM

Total neoadjuvant therapy (TNT) for locally advanced rectal cancer (LARC) is rapidly spreading. The robotic surgical techniques to approach lateral invasion, such as that of the pelvic plexus, have not yet been established. In this technical note, we present a video illustrating a surgical technique for lateral invasion using our novel technique and discuss its pitfalls.

METHOD

We present the case of a 65-year-old man with LARC. Robotic surgery was performed after TNT using the da Vinci Xi Surgical System (Intuitive Surgical Inc., Sunnyvale, CA, USA). The surgical procedure was as follows: (1) D3 lymph node dissection around the inferior mesenteric artery using a medial-to-lateral approach; (2) rectal mobilization; (3) dissection of the ureterohypogastric fascia and ureter; and (4) combined resection of the hypogastric nerve and pelvic plexus. The key surgical point for sidewall invasion is the resection extent. Dividing the resection extent into three areas is important: zone A, which contains the pelvic plexus and is closest to the tumour; zone B, which contains the iliac vessels; and zone C, the most lateral zone, which contains the obturator nerves. This allows organ and function preservation by resecting only the smallest organ that truly requires R0 resection.

RESULTS

The operating time was 333 min, console time was 232 min, and blood loss was 0 mL. The circumferential resection margin was 10 mm, and an R0 resection was achieved.

CONCLUSION

We introduced a novel approach for robotic surgery after TNT for LARC with sidewall invasion. This technique can be performed safely and may help standardize 'beyond total mesorectal excision'.

How Surgeons Think to Avoid Error: A Case Study of the Neurovascular Bundle Sparing During a Robotic Prostatectomy

OBJECTIVE

To illustrate how experts efficiently navigate a "slowing down moment" to obtain optimal surgical outcomes using the neurovascular bundle sparing during a robotic prostatectomy as a case study.

DESIGN

A series of semistructured interviews with four expert uro-oncologists were completed using a cognitive task analysis methodology. Cognitive task analysis, CTA, refers to the interview and extraction of a general body of knowledge. Each interview participant completed four 1 to 2-hour semistructured CTA interviews. The interview data were then deconstructed, coded, and analyzed using a grounded theory analysis to produce a CTA-grid for a robotic prostatectomy for each surgeon, with headings of: surgical steps, simplification maneuvers, visual cues, error/complication recognition, and error/complication management and avoidance.

SETTING

The study took place at an academic teaching hospital located in an urban center in Canada.

PARTICIPANTS

Four expert uro-oncologists participated in the study.

RESULTS

Visual cues, landmarks, common pitfalls, and technique were identified as the 4 key components of the decision-making happening during a slowing down moment in the neurovascular bundle sparing during a robotic prostatectomy.

CONCLUSION

The data obtained from the CTA is novel information identifying patterns and cues that expert surgeons use to inform their surgical decision-making and avoid errors. This decision-making knowledge of visual cues, landmarks, common pitfalls and techniques is also generalizable for other surgical subspecialties. Surgeon educators, surgical teaching programs and trainees looking to improve their decision-making skills could use these components to guide their educational strategies.

Perioperative and Complication Related Outcomes for Robotic-Assisted vs Open Radical Cystectomy: A Comparative National Surgical Quality Improvement Project Analysis

Background: Radical cystectomy (RC) is standard of care for muscle-invasive bladder cancer, but it comes with significant perioperative risk, with half of the patients experiencing major postoperative complications. Robot-assisted radical cystectomies (RARCs) have aimed to decrease patient morbidity and been increasingly adopted in North America. Currently, both open radical cystectomies (ORCs) and RARCs are frequently performed. The aim of this study is to contribute to the existing literature using newly available data from the American College of Surgeons National Surgical Quality Improvement Project (NSQIP), representing one of the most recent, largest multi-institutional studies, while uniquely accounting for a variety of factors, including type of urinary diversion, cancer staging, and neoadjuvant chemotherapy. Methods: RC procedures performed between 2019 and 2021 were identified in NSQIP and the corresponding cystectomy-targeted database. Cases in the ORC group were planned open procedures, and cases in the RARC group were robot assisted, including unplanned conversion to open cases for intention to treat. Chi-square and t-tests were performed to compare baseline demographics and operative parameters. Multivariate analysis was performed for outcomes, including major complications, minor complications, and 30-day mortality rates, while adjusting for baseline differences significant on univariate analysis. Results: Five thousand three hundred forty-three RC cases were identified. Of these, 70% underwent planned ORC, while 30% received RARC. RARC was associated with longer operative times and shorter hospital length of stay compared with ORC. On multivariate analysis, there was no difference between the cohorts in 30-day rates of major complications, hospital readmissions, need for reoperation, or mortality. ORC was, however, associated with higher rates of minor complications, bleeding, superficial surgical site infections, and anastomotic leak. Conclusions: In the NSQIP database, ORC is associated with higher rates of 30-day minor complications, most notably bleeding, compared with RARC. However, there is no difference in regard to perioperative major morbidity or mortality rates. This study is unique in the size of the cohorts compared, timeliness of data (2019-2021), applicability to a variety of different practice settings across the country, and ability to control for factors, such as type of urinary diversion and pathological bladder cancer staging, as well as use of neoadjuvant chemotherapy. This study was approved by the Institutional Review Board (IRB) specific to Thomas Jefferson University.

Robot-assisted low anterior resection in a patient with rectal cancer who had a urinary reservoir: A case report

Undergoing another surgery after a previous abdominal procedure can sometimes result in significant abdominal adhesions. We present a case of robot-assisted low anterior resection in a patient with rectal cancer who had a urinary reservoir. A 65-year-old male patient underwent robot-assisted total bladder resection and creation of a urinary reservoir for bladder cancer in 2013. He presented with melena. Thus, the findings revealed advanced low rectal cancer. The robot-assisted low anterior resection was performed in 2022. Extensive adhesions were observed in the pelvic space. The indocyanine green function was appropriately used, and the robotic surgery was completed without injury to the urinary reservoir or major complications. The surgical time was 510 min, and the blood loss volume was 15 mL. The patient had been recurrence free for 12 months following the surgery. Robot-assisted surgery can be beneficial for patients with rectal cancer with significant pelvic adhesions.

Endorobotic submucosal dissection of rectal lesions using the single port robot DaVinci-SP: initial experience of the first 10 cases

BACKGROUND

Endoluminal surgery is increasingly recognized as a mode of treatment for colorectal neoplasms with the latest robotic single port platform Da Vinci-SP (Intuitive Surgical, Sunnyvale) facilitating submucosal dissection of benign rectal neoplasm.

METHOD

In this study, we present our initial experience with endorobotic submucosal dissection in the management of benign rectal neoplasms using the Da Vinci-SP (Intuitive Surgical, Sunnyvale) between 2020 and 2021. The primary endpoint was the successful completion of submucosal dissection.

RESULTS

During the study period, 10 patients underwent endorobotic submucosal dissection for benign rectal neoplasms. The median age of the patients was 68 (range: 59-78) years, and the mean BMI was 29.38 (range: 22.9-38.5). The mean size of the lesion was 42.3 mm (range: 20-65 mm) and was located 7.3 cm (mean) from the anal verge (range: 2-10 cm). The mean operative time was 91.3 minutes (range: 57-137 minutes). All 10 dissections were completed successfully en bloc. There were no intraoperative complications or mortality. All patients were discharged on the same day and commenced on a normal diet. Late bleeding was observed in one patient receiving anticoagulation, and one patient had urinary retention. Pathology revealed two adenocarcinomas, six tubulovillous adenomas, one tubular adenoma, and one sessile serrated adenoma. There was no recurrence in all other patients during the median follow-up of 6 months (range: 4-16 months).

CONCLUSIONS

Endorobotic submucosal dissection using a single-port robotic platform is safe and feasible for benign rectal mucosal neoplasms. The semiflexible platform offers an alternative to endoscopic submucosal dissection with favourable outcomes.

Robotic 8-mm trocar fascial wounds: To close or not to close?

BACKGROUND

The aim of this study was to investigate 8-mm robotic trocar site hernia (TSH) rate over the short and long term, providing aids to manage the related fascial wounds.

METHODS

A retrospective analysis of 320 patients undergoing robotic surgery was conducted. The primary outcome was 8-mm TSH rate with a minimum follow-up of 12 months. The secondary outcome was the rate of haematomas and infections related to 8-mm wounds and their association with patient comorbidities and trocar position.

RESULTS

One case of TSH was observed (0.31%). There were 15 cases of wound infection (4.68%) and 22 cases of wound haematoma (6.87%). Trocar related complications were significantly associated with patient comorbidities, not with trocar position.

CONCLUSIONS

Our results do not justify the 8-mm fascial wound closure. Data concerning the association between trocar-related complications and patient comorbidities strengthen the need to implement the control of metabolic state and correct administration of perioperative therapy in high-risk patients.

A precise approach to robotic intracorporeal rectal transection and hand-sewn purse-string anastomosis for low anterior resection

This study presents a new technique for robotic-assisted intracorporeal rectal transection and hand-sewn anastomosis for low anterior resection that overcomes some limitations of conventional techniques. By integrating the advantages of the robotic platform, ensuring standardized exposure during rectal transection, and emphasizing the importance of avoiding complications associated with staple crossings, this innovation has the potential to significantly improve outcomes and reduce costs for patients with lower rectal tumors.

Robot-assisted implantation of a microelectrode array in the occipital lobe as a visual prosthesis: technical note

The prospect of direct interaction between the brain and computers has been investigated in recent decades, revealing several potential applications. One of these is sight restoration in profoundly blind people, which is based on the ability to elicit visual perceptions while directly stimulating the occipital cortex. Technological innovation has led to the development of microelectrodes implantable on the brain surface. The feasibility of implanting a microelectrode on the visual cortex has already been shown in animals, with promising results. Current research has focused on the implantation of microelectrodes into the occipital brain of blind volunteers. The technique raises several technical challenges. In this technical note, the authors suggest a safe and effective approach for robot-assisted implantation of microelectrodes in the occipital lobe for sight restoration.

Off-clamp vs on-clamp robot-assisted partial nephrectomy: a systematic review and meta-analysis

OBJECTIVE

To compare intra- and postoperative outcomes between off-clamp and on-clamp robot-assisted partial nephrectomy (RAPN), using data from randomised controlled trials (RCTs) or covariate-matched studies (propensity score-matched or matched-pair analysis).

METHODS

A Preferred Reporting Items for Systematic Reviews and Meta-Analyses-compliant literature review was conducted on PubMed, EMBASE, Scopus and CENTRAL for relevant studies comparing off-clamp to on-clamp RAPN. Primary outcomes were estimated blood loss, postoperative percentage decrease in estimated glomerular filtration rate (eGFR), and margin positive rate. Secondary outcomes were operative time, postoperative eGFR, length of stay, all postoperative complications, major complications, and need for transfusion. Random-effects meta-analyses were performed to generate mean differences (MDs) or odds ratios (ORs).

RESULTS

A total of 10 studies (2307 patients) were shortlisted for analysis. There was no significant difference in estimated operative blood loss between off-clamp and on-clamp RAPN (MD 21.9 mL, 95% confidence interval [CI] -0.9 to 44.7 mL; P = 0.06, I2  = 58%). Off-clamp RAPN yielded a smaller postoperative eGFR deterioration (MD 3.10%, 95% CI 1.05-5.16%; P = 0.008, I2  = 13%) and lower odds of margin positivity (OR 0.62, 95% CI 0.40-0.94; P = 0.03, I2  = 0%). No significant differences were found for all secondary outcomes.

CONCLUSIONS

Off-clamp and on-clamp RAPN are similarly effective approaches for selected renal masses. Within the classic trifecta of PN outcomes, off-clamp RAPN yields similar rates of perioperative complications and may possibly offer better preservation of renal function and reduced margin-positive rates.

Lower bleeding volume contributes to decreasing surgical site infection in radical cystectomy: A propensity score-matched comparison of open versus robot-assisted radical cystectomy

OBJECTIVES

To compare the incidence of surgical site infections (SSI) between robot-assisted and open radical cystectomies and investigate the risk factors for SSI after radical cystectomies.

METHODS

Consecutive patients who underwent radical cystectomy between July 2008 and December 2022 were retrospectively reviewed. The prevalence and characteristics of SSI after open and robot-assisted radical cystectomies were compared, and the risk factors for SSI were investigated using propensity score matching.

RESULTS

This study enrolled 231 patients (open: 145, robot-assisted: 86). In the robot-assisted group, urinary diversion was performed using an intracorporeal approach. SSI occurred in 34 (open: 28, robot-assisted: 6) patients, and the incidence was significantly lower in the robot-assisted group (19.3% vs. 7.0%, p = 0.007). After propensity score matching cohort (open: 34, robot-assisted: 34), increased bleeding volume, blood transfusion, and delayed postoperative oral feeding were significantly associated with SSI. Only increased bleeding volume remained a significant risk factor in the multivariate regression analysis (odds ratio, 1.13 [per 100 mL increase]; 95% confidence interval: 1.02-1.25; p = 0.001). The cutoff bleeding volume for predicting SSI was 1630 mL with an area under the receiver operating characteristic curve, sensitivity, and specificity of 0.773, 0.73, and 0.75, respectively.

CONCLUSIONS

The incidence of SSI after robot-assisted radical cystectomy was significantly lower than that after the open procedure. However, decreased bleeding volume, which was significantly associated with robot-assisted procedures, was an independent and more significant factor for reducing SSI after radical cystectomy than the differences of the surgical procedure even after propensity score matching.

Proficiency Levels and Validity Evidence for Scoring Metrics for a Virtual Reality and Inanimate Robotic Surgery Simulation Curriculum

OBJECTIVE

Our institution recently implemented a virtual reality (VR) skills curriculum for general surgery residents using the SimNow simulator. Based on a content alignment study, we revised the curriculum to include only 20 of 33 VR tasks and we added 3 previously validated inanimate tasks. The purpose of this study was to establish expert-derived proficiency levels for all tasks and to evaluate the validity of the scoring for the VR tasks.

DESIGN

Two expert robotic surgeons performed 5 repetitions of each VR and inanimate task. The trimmed mean (lowest scoring attempt and outliers [>2 standard deviations] were eliminated) was defined as the expert level for each task. For the VR tasks, expert levels were compared to resident performance to evaluate validity.

SETTING

This study was conducted at the University of Texas Southwestern Medical Center (Dallas, TX), a tertiary care academic teaching hospital.

PARTICIPANTS

Two expert robotic surgeons participated in this study. The data from 42 residents (PGY2-4) who completed the original curriculum was used to represent novice performance.

RESULTS

Comparison of expert levels and resident performance was statistically significant for 15 VR tasks (supporting validity) and approached significance (p = 0.06, 0.09) for 2 VR tasks; expert levels were designated as proficiency levels for these 17 tasks. Group comparisons were clearly not significant (p = 0.2-0.8) for 3 VR tasks; 2 of these 3 tasks were retained as introductory exercises (with 3 repetitions required) and 1 was excluded. For the 3 inanimate tasks, expert levels minus 2 standard deviations were designated as proficiency levels.

CONCLUSIONS

This analysis generated validity evidence for 15 VR tasks and established expert-derived proficiency levels for 17 VR tasks and 3 inanimate tasks. Our proposed curriculum now consists of 19 VR and 3 inanimate tasks using the selected proficiency levels. We anticipate that this design will maximize curriculum efficiency and effectiveness.

A meta-analysis of postoperative wound complications at the surgical site in prostate cancer patients undergoing robotic surgery

This meta-analysis critically evaluates the role of robotic surgery in reducing postoperative wound complications in prostate cancer patients, comparing it with traditional open and laparoscopic approaches. Our extensive literature search resulted in 9 studies comprising 2063 patients. The results highlighted a significant reduction in the incidence of wound complications, with an 84% heterogeneity index and a standardized mean difference (SMD) of 0.49 (95% Confidence Intervals: 0.42 to 0.58, p < 0.01) in favour of robotic surgery. Additionally, a notable decrease in wound infection rates was observed, marked by a 94% heterogeneity index and a SMD of 0.26 (95% CIs: 0.19 to 0.35, p < 0.01). A considerable reduction in wound dehiscence events was also noted, particularly in a subset of studies, reflecting a 70% heterogeneity index and a SMD of 0.23 (95% CIs: 0.12 to 0.45, p < 0.01). These findings suggest that robotic surgery may offer significant advantages in managing wound-related outcomes in prostate cancer surgeries. However, the variability among the studies warrants cautious interpretation of the results and underscores the need for more targeted research in this area.

Robot-Assisted Pyeloplasty with HUGO™ Robotic System: Initial Experience and Optimal Surgical Set-Up at a Tertiary Referral Robotic Center

Background: In February 2021 Medtronic® (Minneapolis, MN) launched the HUGO™ Robot-Assisted Surgery (RAS) System in the global market. The aim of the current study is to describe the first case series and the optimal setup of robot-assisted pyeloplasty procedure, performed with HUGO RAS system in a tertiary referral robotic center. Methods: Data from consecutive patients who underwent robot-assisted pyeloplasty at Onze-Lieve-Vrouwziekenhuis Hospital (Aalst, Belgium) were recorded. Baseline characteristics, and perioperative and surgical outcomes were collected. Results: Overall, 10 robot-assisted pyeloplasties were performed (October 2022-September 2023). Based on our expertise, the following minor setting changes have been made, relative to the official setup guide: the endoscope port and, subsequently, the left and right-hand ports were positioned more laterally. Additionally, the reserve/4th port was placed more laterally and cranially, and adjusted the arm cart's tilt angle, reducing it from -30° to -15°. The median docking time was 8 (interquartile range [IQR]: 7.2-9.8) minutes, and the median active console time was 89.5 (80.0-95.8) minutes. No conversion to open/laparoscopic surgery or perioperative complications was encountered. A single technical problem was recorded in 1 (10%) procedure. Specifically, one arm was blocked, and the procedure was accomplished with three arms without compromising the procedure success. Conclusions: This study represents the first worldwide series of robot-assisted pyeloplasty performed with the HUGO RAS system and shows promising results. The procedure might be safely performed with this robotic platform achieving optimal perioperative outcomes.

Are 3D Image Guidance Systems Ready for Use? A Comparative Analysis of 3D Image Guidance Implementations in Minimally Invasive Partial Nephrectomy

Introduction: Three-dimensional image-guided surgical (3D-IGS) systems for minimally invasive partial nephrectomy (MIPN) can potentially improve the efficiency and accuracy of intraoperative anatomical localization and tumor resection. This review seeks to analyze the current state of research regarding 3D-IGS, including the evaluation of clinical outcomes, system functionality, and qualitative insights regarding 3D-IGS's impact on surgical procedures. Methods: We have systematically reviewed the clinical literature pertaining to 3D-IGS deployed for MIPN. For inclusion, studies must produce a patient-specific 3D anatomical model from two-dimensional imaging. Data extracted from the studies include clinical results, registration (alignment of the 3D model to the surgical scene) method used, limitations, and data types reported. A subset of studies was qualitatively analyzed through an inductive coding approach to identify major themes and subthemes across the studies. Results: Twenty-five studies were included in the review. Eight (32%) studies reported clinical results that point to 3D-IGS improving multiple surgical outcomes. Manual registration was the most utilized (48%). Soft tissue deformation was the most cited limitation among the included studies. Many studies reported qualitative statements regarding surgeon accuracy improvement, but quantitative surgeon accuracy data were not reported. During the qualitative analysis, six major themes emerged across the nine applicable studies. They are as follows: 3D-IGS is necessary, 3D-IGS improved surgical outcomes, researcher/surgeon confidence in 3D-IGS system, enhanced surgeon ability/accuracy, anatomical explanation for qualitative assessment, and claims without data or reference to support. Conclusions: Currently, clinical outcomes are the main source of quantitative data available to point to 3D-IGS's efficacy. However, the literature qualitatively suggests the benefit of accurate 3D-IGS for robotic partial nephrectomy.

Minimally Invasive Surgical Therapies for Ureteral Polyps: A Systematic Review

Background: Ureteral polyps are rare benign ureteral tumor. No guideline recommends that open or minimally invasive surgery is best for treating ureteral polyps. This article aims to provide a comprehensive review of the minimally invasive techniques currently available for treating ureteral polyps. Materials and Methods: We performed a comprehensive search of articles published in PubMed, using the keywords "ureteral" and "polyp," or "polyps." Results: A total of 275 studies were obtained from the literature search but 96 articles were excluded. Conclusions: Several minimally invasive approaches were developed with the advancement of medical technology, including endoscopic, laparoscopic, and robotic approaches; however, the best surgical technique was yet to be decided. Due to the advantages and disadvantages of these approaches, the best surgical approach should be tailored to each patient's needs and the surgeon's preferences and experience.

Accuracy of the Yakebot dental implant robotic system versus fully guided static computer-assisted implant surgery template in edentulous jaw implantation: A preliminary clinical study

AIMS

To compare the accuracy of the Yakebot dental implant robotic system with that of fully guided static computer-assisted implant surgery (CAIS) template in edentulous implantation.

MATERIALS AND METHODS

Thirteen patients with edentulous were recruited and divided into two groups: the Yake robotic system group (experimental) (n = 5) and the CAIS group (control) (n = 8). Postoperative cone-beam computed tomography (CBCT) was performed immediately, and the 3-dimensional positions of implants were obtained and compared with that in the preoperative design. The comparison showed platform, apical, depth, and angular deviations. A value of p < 0.05 was considered statistically significant.

RESULTS

A total of 84 implants (36 in the robotic group and 48 in the CAIS group) were placed. The mean deviation at the implant platform, apex, depth, and angle in the CAIS group was 1.37 ± 0.72 mm, 1.28 ± 0.68 mm, 0.88 ± 0.47 mm, and 3.47 ± 2.02°, respectively. However, the mean deviation at the implant platform, apex, depth, and angle in the robotic group was 0.65 ± 0.25 mm, 0.65 ± 0.22 mm, 0.49 ± 0.24 mm, and 1.43 ± 1.18°, respectively. Significant differences in the four types of deviation (p < 0.05) between the two groups were observed.

CONCLUSION

The accuracy of robotic system in edentulous implant placement was superior to that of the CAIS template, suggesting that robotic system is more accurate, safe, and flexible, can be considered a promising treatment in clinical practice.

A Comprehensive Overview of Intraoperative Complications during Retzius-Sparing Robot-Assisted Radical Prostatectomy: Single Series from High-Volume Center

BACKGROUND

Intraoperative complications (ICs) are invariably underreported in urological surgery despite the recent endorsement of new classification systems. We aimed to provide a detailed overview of ICs during Retzius-sparing robot-assisted radical prostatectomy (RS-RARP).

METHODS

We prospectively collected data from 1891 patients who underwent RS-RARP at a single high-volume European center from January 2010 to December 2022. ICs were collected based on surgery reports and categorized according to the Intraoperative Adverse Incident Classification (EAUiaiC). The quality criteria for accurate and comprehensive reporting of intraoperative adverse events proposed by the Intraoperative Complications Assessment and Reporting with Universal Standards (ICARUS) Global Surgical Collaboration Project were fulfilled. To better classify the role of the RS-RARP approach, ICs were classified into anesthesiologic and surgical ICs. Surgical ICs were further divided according to the timing of the complication in RARP-related ICs and ePNLD-related ICs.

RESULTS

Overall, 40 ICs were reported in 40 patients (2.1%). Ten out of thirteen ICARUS criteria were satisfied. According to EAUiaiC grading of ICs, 27 (67.5%), 7 (17.5%), 2 (5%), 2 (5%), and 2 (5%) patients experienced Grade 1, 2, 3, 4A, and 4B, respectively. When we classified the ICs, two cases (5%) were classified as anesthesiologic ICs. Among the 38 surgical ICs, 16 (42%) were ePNLD-related, and 22 (58%) were RARP-related. ICs led to seven (0.37%) post-operative sequelae (four non-permanent and three permanent). Patients who suffered ICs were significantly older (67 years vs. 65 years, p = 0.02) and had a higher median BMI (27.0 vs. 26.1, p = 0.01), but did not differ in terms of comorbidities or tumor characteristics (all p values ≥ 0.05).

CONCLUSIONS

Intraoperative complications during RS-RARP are relatively infrequent, but should not be underestimated. Patients suffering from ICs are older, have a higher body mass index, a higher rate of intraoperative blood transfusion, and a longer length of stay.

Robotic Vascular Resection in Pancreatic Ductal Adenocarcinoma: A Systematic Review

(1) Background: This study comprehensively compared robotic pancreatic surgery with vascular resection (RPS-VR) to other surgical procedures in the treatment of pancreatic ductal adenocarcinoma (PDAC). (2) Methods: A systematic review of relevant literature was conducted to assess a range of crucial surgical and oncological outcomes. (3) Results: Findings indicate that robotic surgery with vascular resections (VRs) significantly prolongs the duration of surgery compared to other surgical procedures, and they notably demonstrate an equal hospital stay. While some studies reported a lower conversion rate and a higher rate of blood loss and blood transfusion in the RPS-VR group, others found no significant disparity. Furthermore, RPS-VR consistently correlated with comparable recurrence rates, free margins R0, postoperative mortality, and complication rates. Concerning the last one, certain reviews reported a higher rate of major complications. Overall survival and disease-free survival remained comparable between the RPS-VR and other surgical techniques in treating PDAC. (4) Conclusions: The analysis emphasizes how RPS-VR is a resembling approach in terms of surgical outcomes and aligns with existing literature findings in this field.

Experience with Laparoscopic and Robotic Colon Surgery Together with Other Major Minimally Invasive Procedures for Unrelated Pathologies

Background: Indications for combined colon surgery together with other procedures include oncologic multivisceral resections and abdominal trauma. It is unclear if combining minimally invasive (MI) colon surgery with unrelated other procedures increases the risk for complications. Patients and Methods: The surgical database from two institutions during a 10-year period was queried for combined colon surgeries together with other interventions. All open cases, combined cases performed for one pathology and MI colectomies together with a minor procedure, were excluded. Results: Median age of the 6 men and 7 women was 64.4 (range 42.7-75.4) years. Colon surgeries included right (5), sigmoid (4) transverse (1) colectomies, rectum resection (1), rectopexy (1), and colostomy reversal (1) with indications of colorectal cancer (5), diverticulitis (3), benign ileocecal mass (1), colonic volvulus (3) and rectal prolapse (1). Second procedures included two splenectomies (sarcoidosis, ITP), paraesophageal hernia repairs (4), right diaphragmatic repairs [eventration (2) and Morgagni type hernia]; cholecystectomies (2), appendectomy (acute appendicitis), duodenal wedge resection (carcinoid), reversal of a gastric bypass (Roux limb stricture) one each. Cases were done laparoscopically (7) and robotic assisted (6). In most cases only 4 trocars were used. Median OR time was 4.3 (range 2.5 to 6.6) hours. No anastomotic breakdown was observed. Conclusions: Combining MI colectomy and other major abdominal surgeries can be safely done and in this series did not increase morbidity or mortality but avoids a second operation. Patient selection seems important and port placement may need to be altered to achieve good exposure for both procedures.

Myosteatosis predicts postoperative complications and long-term survival in robotic gastrectomy for gastric cancer: A propensity score analysis

BACKGROUND

Robotic gastrectomy is increasingly utilized for gastric cancer, but high morbidity remains a concern. Myosteatosis or low skeletal muscle density reflecting fatty infiltration, associates with complications after other cancer surgeries but has not been evaluated for robotic gastrectomy.

METHODS

This retrospective study analysed 381 patients undergoing robotic gastrectomy for gastric cancer from September 2019 to October 2022. Myosteatosis was quantified on preoperative computed tomography (CT) images at lumbar 3 (L3). Propensity score matching addressed potential confounding between myosteatosis and non-myosteatosis groups. Outcomes were postoperative complications, 30 days mortality, 30 days readmissions and survival.

RESULTS

Myosteatosis was present in 33.6% of patients. Myosteatosis associated with increased overall (47.7% vs. 26.5%, p < 0.001) and severe complications (12.4% vs. 4.9%, p < 0.001). After matching, myosteatosis remained associated with increased overall complications, major complications, intensive care unit (ICU) transfer and readmission (all p < 0.05). Myosteatosis independently predicted overall [odds ratio (OR) = 2.86, 95% confidence interval (CI): 1.57-5.20, p = 0.001] and severe complications (OR = 4.81, 95% CI: 1.51-15.27, p = 0.008). Myosteatosis also associated with reduced overall (85.0% vs. 93.2%, p = 0.015) and disease-free survival (80.3% vs. 88.4%, p=0.029). On multivariate analysis, myosteatosis independently predicted poorer survival [hazard ratio (HR) = 2.83, 95% CI: 1.32-6.08, p=0.012] and disease-free survival (HR = 1.83, 95% CI: 1.01-3.30, p=0.032).

CONCLUSION

Preoperative CT-defined myosteatosis independently predicts increased postoperative complications and reduced long-term survival after robotic gastrectomy for gastric cancer. Assessing myosteatosis on staging CT could optimize preoperative risk stratification.

Is Tibial Bone Mineral Density Related to Sex, Age, Preoperative Alignment, or Fixation Method in Primary Total Knee Arthroplasty?

BACKGROUND

Cementless total knee arthroplasty (TKA) has regained interest for its potential for long-term biologic fixation. The density of the bone is related to its ability to resist static and cyclic loading and can affect long-term implant fixation; however, little is known about the density distribution of periarticular bone in TKA patients. Thus, we sought to characterize the bone mineral density (BMD) of the proximal tibia in TKA patients.

METHODS

We included 42 women and 50 men (mean age 63 years, range: 50 to 87; mean body mass index 31.6, range: 20.5 to 49.1) who underwent robotic-assisted TKA and had preoperative computed tomography scans with a BMD calibration phantom. Using the robotic surgical plan, we computed the BMD distribution at 1 mm-spaced cross-sections parallel to the tibial cut from 2 mm above the cut to 10 mm below. The BMD was analyzed with respect to patient sex, age, preoperative alignment, and type of fixation.

RESULTS

The BMD decreased from proximal to distal. The greatest changes occurred within ± 2 mm of the tibial cut. Age did not affect BMD for men; however, women between 60 and 70 years had higher BMD than women ≥ 70 years for the total cut (P = .03) and the medial half of the cut (P = .03). Cemented implants were used in 1 86-year-old man and 18 women (seven < 60 years, seven 60 to 70 years, and four ≥ 70 year old). We found only BMD differences between cemented or cementless fixation for women < 60 years.

CONCLUSIONS

To our knowledge, this is the first study to characterize the preoperative BMD distribution in TKA patients relative to the intraoperative tibial cut. Our results indicate that while sex and age may be useful surrogates of BMD, the clinically relevant thresholds for cementless knees remain unclear, offering an area for future studies.

Advances in Hernia Care State of the Art

The field of hernia surgery has seen many recent advances and continues to evolve. Care of the hernia patient begins preoperatively by ensuring adequate preparation for surgery with surgeons now having the opportunity to accurately predict risk which can aid with informed consent. Imaging studies can now help surgeons diagnose and plan hernia surgery on an individual level based on hernia characteristics as well as abdominal wall musculature. In the operating room, new technology and surgical techniques have allowed surgeons to become increasingly sophisticated with goals of reducing tension on midline closures, utilizing minimally invasive and robotic techniques, and availability of new and varied mesh prosthetics. While modest improvements in outcomes have been witnessed by these advances, there is still opportunity for improvement which will be realized by continued research, use of registries, and education and training. Hernia prevention strategies focusing on minimally invasive surgery, laparotomy closure, and the use of prophylactic mesh will also help with the burden of incisional hernias. These advances in hernia surgery have led to the new field of Abdominal Core Health which helps represent this evolving and growing new subspecialty of general surgery.

Assessing Trifecta and Pentafecta Success Rates between Robot-Assisted vs. Open Radical Cystectomy: A Propensity Score-Matched Analysis

BACKGROUND

This study aimed to evaluate the surgical and oncological outcomes of robot-assisted radical cystectomy (RARC) versus open radical cystectomy (ORC) using trifecta and pentafecta parameters.

METHODS

The clinical data of 41 patients who underwent RARC between 2018 and 2022 were prospectively collected and retrospectively compared to those of 330 patients undergoing ORC using 1:1 propensity score matching. Trifecta was defined as simultaneous negative surgical margins (SMs), a lymph node (LN) yield ≥ 16, and the absence of major complications (Clavien-Dindo grade III-V) within 90 days postoperatively. Pentafecta additionally included a 12-month recurrence-free rate and a time between the transurethral resection of a bladder tumor (TURBT) and radical cystectomy (RC) ≤ 3 months. The continuous variables were compared using the Mann-Whitney U test, and the categorical variables were analyzed using the chi-squared test.

RESULTS

No statistically significant differences in trifecta and pentafecta success rates were observed between the RARC and ORC cohorts after propensity score matching. However, the RARC group exhibited significantly reduced blood loss (RARC: 317 mL vs. ORC: 525 mL, p = 0.01).

CONCLUSIONS

RARC offers distinct advantages over ORC in terms of reduced blood loss, while trifecta and pentafecta success rates do not differ significantly between the two surgical approaches.

Ergonomic Assessment of Robotic versus Thoracoscopic Thymectomy

Introduction: Robotic and thoracoscopic surgery are being increasingly adopted as minimally invasive alternatives to open sternotomy for complete thymectomy. The superior maneuverability range and three-dimensional magnified vision are potential ergonomical advantages of robotic surgery. To compare the ergonomic characteristics of robotic versus thoracoscopic thymectomy, a previously developed scoring system based on impartial findings was employed. The relationship between ergonomic scores and perioperative endpoints was also analyzed. Methods: Perioperative data of patients undergoing robotic or thoracoscopic complete thymectomy between January 2014 and December 2022 at three institutions were retrospectively retrieved. Surgical procedures were divided into four standardized surgical steps: lower-horns, upper-horns, thymic veins and peri-thymic fat dissection. Three ergonomic domains including maneuverability, exposure and instrumentation were scored as excellent(score-3), satisfactory(score-2) and unsatisfactory(score-1) by three independent reviewers. Propensity score matching (2:1) was performed, including anterior mediastinal tumors only. The primary endpoint was the total maneuverability score. Secondary endpoints included the other ergonomic domain scores, intraoperative adverse events, conversion to sternotomy, operative time, post-operative complications and residual disease. Results: A total of 68 robotic and 34 thoracoscopic thymectomies were included after propensity score matching. The robotic group had a higher total maneuverability score (p = 0.039), particularly in the peri-thymic fat dissection (p = 0.003) and peri-thymic fat exposure score (p = 0.027). Moreover, the robotic group had lower intraoperative adverse events (p = 0.02). No differences were found in residual disease. Conclusions: Robotic thymectomy has shown better ergonomic maneuverability compared to thoracoscopy, leading to fewer intraoperative adverse events and comparable early oncological results.

Accuracy of robotic surgery for dental implant placement: A systematic review and meta-analysis

OBJECTIVES

To systematically analyze the accuracy of robotic surgery for dental implant placement.

MATERIALS AND METHODS

PubMed, Embase, and Cochrane CENTRAL were searched on October 25, 2023. Model studies or clinical studies reporting the accuracy of robotic surgery for dental implant placement among patients with missing or hopeless teeth were included. Risks of bias in clinical studies were assessed. Meta-analyses were undertaken.

RESULTS

Data from 8 clinical studies reporting on 109 patients and 242 implants and 13 preclinical studies were included. Positional accuracy was measured by comparing the implant plan in presurgery CBCT and the actual implant position in postsurgery CBCT. For clinical studies, the pooled (95% confidence interval) platform deviation, apex deviation, and angular deviation were 0.68 (0.57, 0.79) mm, 0.67 (0.58, 0.75) mm, and 1.69 (1.25, 2.12)°, respectively. There was no statistically significant difference between the accuracy of implants placed in partially or fully edentulous patients. For model studies, the pooled platform deviation, apex deviation, and angular deviation were 0.72 (0.58, 0.86) mm, 0.90 (0.74, 1.06) mm, and 1.46 (1.22, 1.70)°, respectively. No adverse event was reported.

CONCLUSION

Within the limitation of the present systematic review, robotic surgery for dental implant placement showed suitable implant positional accuracy and had no reported obvious harm. Both robotic systems and clinical studies on robotic surgery for dental implant placement should be further developed.

Tremor Assessment in Robot-Assisted Microlaryngeal Surgery Using Computer Vision-Based Tool Tracking

OBJECTIVE

Use microscopic video-based tracking of laryngeal surgical instruments to investigate the effect of robot assistance on instrument tremor.

STUDY DESIGN

Experimental trial.

SETTING

Tertiary Academic Medical Center.

METHODS

In this randomized cross-over trial, 36 videos were recorded from 6 surgeons performing left and right cordectomies on cadaveric pig larynges. These recordings captured 3 distinct conditions: without robotic assistance, with robot-assisted scissors, and with robot-assisted graspers. To assess tool tremor, we employed computer vision-based algorithms for tracking surgical tools. Absolute tremor bandpower and normalized path length were utilized as quantitative measures. Wilcoxon rank sum exact tests were employed for statistical analyses and comparisons between trials. Additionally, surveys were administered to assess the perceived ease of use of the robotic system.

RESULTS

Absolute tremor bandpower showed a significant decrease when using robot-assisted instruments compared to freehand instruments (P = .012). Normalized path length significantly decreased with robot-assisted compared to freehand trials (P = .001). For the scissors, robot-assisted trials resulted in a significant decrease in absolute tremor bandpower (P = .002) and normalized path length (P < .001). For the graspers, there was no significant difference in absolute tremor bandpower (P = .4), but there was a significantly lower normalized path length in the robot-assisted trials (P = .03).

CONCLUSION

This study demonstrated that computer-vision-based approaches can be used to assess tool motion in simulated microlaryngeal procedures. The results suggest that robot assistance is capable of reducing instrument tremor.

Open or robotic? Radical cystectomies for patients with non-metastatic bladder cancer: A systematic review and meta-analysis

Background

This systematic review and meta-analysis will review randomized control trials for localized bladder cancer, evaluating surgical and pathologic outcomes of ORC versus RARC.

Methods

Randomized studies evaluating adults with non-metastatic bladder cancer who underwent a radical cystectomy. Randomized trials were selected for final review. Data was extracted and analyzed with Revman 5 software. The primary outcome was complication rates within 90 days. Secondary outcomes included postoperative quality of life, estimated intraoperative blood loss, and other perioperative outcomes. Continuous variables were reported using mean difference with 95% confidence intervals, and dichotomous variables were reported using risk difference with 95% confidence intervals with RARC as the experimental group and ORC as the reference group.

Results

Of 134 articles screened, six unique randomized studies were selected. For Grade I-II complications, the risk ratio (RR) was 0.92 (95% CI [0.79,1.08], p = 0.33), and for Grade III-V complications, RR 0.93 (95% CI [0.73,1.18], p = 0.59). RARC resulted in decreased blood loss (95% CI [-438.08, -158.44], p < 0.00001) and longer operative time (95% CI [55.23, 133.13], p < 0.00001). Quality of life using the EORTC-QLQ-30 global health score at 3 months post-op appeared to favor RARC with a mean difference of 4.46 points (95% CI [1.78, 7.15], p = 0.001). Pathologic outcomes neither statistically nor clinically favored one modality, as there was no significant difference between mean lymph node yield (p = 0.49), positive lymph nodes (p = 1.00), and positive surgical margins (p = 0.85) between the surgical modalities.

Conclusions

Although one surgical modality is not overtly superior, the choice may be decided by mitigating individual operative risk factors like intraoperative blood loss, operative time, post-operative quality of life, as well as institutional costs and learning curve among surgeons.

Minimally invasive surgery for Inflammatory Bowel Disease: a systematic review and meta-analysis of robotic versus laparoscopic surgical techniques

BACKGROUND

To evaluate outcomes of robotic versus conventional laparoscopic colorectal resections in patients with inflammatory bowel disease (IBD).

METHODS

Comparative studies of robotic versus laparoscopic colorectal resections in patients with IBD were included. Primary outcome was total post-operative complication rate. Secondary outcomes included operative time, conversion to open surgery, anastomotic leaks, intra-abdominal abscess formation, ileus occurrence, surgical site infection, re-operation, re-admission rate, length of hospital stay, and 30-day mortality. Combined overall effect sizes were calculated using random-effects model and the Newcastle-Ottawa Scale was used to assess risk of bias.

RESULTS

Eleven non-randomised studies (n=5,566 patients) divided between those undergoing robotic (n=365) and conventional laparoscopic (n=5,201) surgery were included. Robotic platforms were associated with a significantly lower overall post-operative complication rate compared with laparoscopic surgery (P=0.03).Laparoscopic surgery was associated with a significantly shorter operative time (P=0.00001). No difference was found in conversion rates to open surgery (P=0.15), anastomotic leaks (P=0.84), abscess formation (P=0.21), paralytic ileus (P=0.06), surgical site infections (P=0.78), re-operation (P=0.26), re-admission rate (P=0.48), and 30-day mortality (P=1.00) between the groups.Length of hospital stay was shorter following a robotic sub-total colectomy compared with conventional laparoscopy (P=0.03).

CONCLUSION

Outcomes in the surgical management of IBD are comparable between traditional laparoscopic techniques and robotic-assisted minimally invasive surgery demonstrating the safety and feasibility of robotic platforms. Larger studies investigating the use of robotic technology in Crohn's disease and ulcerative colitis separately may be of benefit with specific focus on important IBD-related metrics.

Current Status of Robotic Hepatobiliary and Pancreatic Surgery

Laparoscopic surgery is performed worldwide and has clear economic and social benefits in terms of patient recovery time. It is used for most gastrointestinal surgical procedures, but laparoscopic surgery for more complex procedures in the esophageal, hepatobiliary, and pancreatic regions remains challenging. Minimally invasive surgery that results in accurate tumor dissection is vital in surgical oncology, and development of surgical systems and instruments plays a key role in assisting surgeons to achieve this. A notable advance in the latter half of the 1990s was the da Vinci Surgical System, which involves master-slave surgical support robots. Featuring high-resolution three-dimensional (3D) imaging with magnification capabilities and forceps with multi-joint function, anti-shake function, and motion scaling, the system compensates for the drawbacks of conventional laparoscopic surgery. It is expected to be particularly useful in the field of hepato-biliary-pancreatic surgery, which requires delicate reconstruction involving complex liver anatomy with diverse vascular and biliary systems and anastomosis of the biliary tract, pancreas, and intestines. The learning curve is said to be short, and it is hoped that robotic surgery will be standardized in the near future. There is also a need for a standardized robotic surgery training system for young surgeons that can later be adapted to a wider range of surgeries. This systematic review describes trends and future prospects for robotic surgery in the hepatobiliary-pancreatic region.

Could robotic-assisted surgery reduce mesh-related complications after ventral mesh rectopexy? Experience of a tertiary centre and systematic review of the literature

AIM

The development of robotic assistance has made dissection and suturing in the deep pelvis much easier. The augmented quality of the images and the articulation of the robotic arms have also enabled a more precise dissection. The aim of this study is to present the data on robotic-assisted ventral mesh rectopexy procedures in a university hospital and examine the literature in terms of mesh erosion.

METHOD

The electronic databases Pubmed, Embase and Cochrane were searched. Studies from January 2004 until January 2023 in the English language were included. Studies which included fewer than 10 patients were excluded. Laparoscopic or robotic-assisted ventral mesh rectopexies were included. Mesh erosion rates following laparoscopic or robotic-assisted ventral mesh rectopexies were measured.

RESULTS

Overall, the systematic review presents 5911 patients from 43 studies who underwent laparoscopic ventral mesh rectopexy compared with 746 patients treated with robotic-assisted ventral mesh rectopexy from six studies and our centre. Mesh erosion was rare in both groups; however, the prevalence was greater in the laparoscopy group (0.90% vs. 0.27%).

CONCLUSION

The mesh erosion rates are very low with robotic-assisted ventral mesh rectopexy. For precise results, more studies and experience in robotic surgery are required.

Robot Assisted Laparoscopic Surgery in Gynaecology: An Evolving Assistive Technology

Laparoscopic surgery is extensively utilized to treat a range of gynaecological conditions and pathologies. The advantages of laparoscopic surgery include the minimalization of blood loss and scarring, improved recovery times, and shorter hospital admissions. However, robotic technologies have had an increasing presence within gynaecological laparoscopic surgery in recent decades. This literature review therefore aims to discuss laparoscopy from 3 perspectives. First, the evolution of laparoscopy is reviewed with a focus on its origins, its transition from a diagnostic to an operative tool, and its role in present-day gynaecology. Second, interventions for benign gynaecological conditions (including excision of benign ovarian tumours, total laparoscopic hysterectomy, and laparoscopic myomectomy) are reviewed. The laparoscopic management of malignant gynaecology (including ovarian cancer, endometrial cancer, and cervical cancer) is also discussed. Finally, whilst robot-assisted laparoscopic surgery is experiencing rapid technological advancement, it is pertinent to consider the extent of its benefits when compared to open or conventional laparoscopic approaches in gynaecological surgery.

Robotic surgery for deep-infiltrating endometriosis: is it time to take a step forward?

Endometriosis is a chronic debilitating disease that affects nearly 10% of women of the reproductive age. Although the treatment modalities of endometriosis are numerous, surgical excision of the endometriotic implants and nodules remains the sole cytoreductive approach. Laparoscopic excision of endometriosis was proven to be beneficial in improving the postoperative pain and fertility. Moreover, it was also proved to be safe and efficient in treating the visceral localization of deep endometriosis, such as urinary and colorectal endometriosis. More recently, robotic-assisted surgery gained attention in the field of endometriosis surgery. Although the robotic technology provides a 3D vision of the surgical field and 7-degree of freedom motion, the safety, efficacy, and cost-effectiveness of this approach are yet to be determined. With this paper, we aim to review the available evidence regarding the role of robotic surgery in the management of endometriosis along with the current practices in the field.

Study International Multicentric Pancreatic Left Resections (SIMPLR): Does Surgical Approach Matter?

BACKGROUND

Minimally invasive surgery is increasingly preferred for left-sided pancreatic resections. The SIMPLR study aims to compare open, laparoscopic, and robotic approaches using propensity score matching analysis.

METHODS

This study included 258 patients with tumors of the left side of the pancreas who underwent surgery between 2016 and 2020 at three high-volume centers. The patients were divided into three groups based on their surgical approach and matched in a 1:1 ratio.

RESULTS

The open group had significantly higher estimated blood loss (620 mL vs. 320 mL, p < 0.001), longer operative time (273 vs. 216 min, p = 0.003), and longer hospital stays (16.9 vs. 6.81 days, p < 0.001) compared to the laparoscopic group. There was no difference in lymph node yield or resection status. When comparing open and robotic groups, the robotic procedures yielded a higher number of lymph nodes (24.9 vs. 15.2, p = 0.011) without being significantly longer. The laparoscopic group had a shorter operative time (210 vs. 340 min, p < 0.001), shorter ICU stays (0.63 vs. 1.64 days, p < 0.001), and shorter hospital stays (6.61 vs. 11.8 days, p < 0.001) when compared to the robotic group. There was no difference in morbidity or mortality between the three techniques.

CONCLUSION

The laparoscopic approach exhibits short-term benefits. The three techniques are equivalent in terms of oncological safety, morbidity, and mortality.

Automatic 3D Augmented-Reality Robot-Assisted Partial Nephrectomy Using Machine Learning: Our Pioneer Experience

The aim of "Precision Surgery" is to reduce the impact of surgeries on patients' global health. In this context, over the last years, the use of three-dimensional virtual models (3DVMs) of organs has allowed for intraoperative guidance, showing hidden anatomical targets, thus limiting healthy-tissue dissections and subsequent damage during an operation. In order to provide an automatic 3DVM overlapping in the surgical field, we developed and tested a new software, called "ikidney", based on convolutional neural networks (CNNs). From January 2022 to April 2023, patients affected by organ-confined renal masses amenable to RAPN were enrolled. A bioengineer, a software developer, and a surgeon collaborated to create hyper-accurate 3D models for automatic 3D AR-guided RAPN, using CNNs. For each patient, demographic and clinical data were collected. A total of 13 patients were included in the present study. The average anchoring time was 11 (6-13) s. Unintended 3D-model automatic co-registration temporary failures happened in a static setting in one patient, while this happened in one patient in a dynamic setting. There was one failure; in this single case, an ultrasound drop-in probe was used to detect the neoplasm, and the surgery was performed under ultrasound guidance instead of AR guidance. No major intraoperative nor postoperative complications (i.e., Clavien Dindo > 2) were recorded. The employment of AI has unveiled several new scenarios in clinical practice, thanks to its ability to perform specific tasks autonomously. We employed CNNs for an automatic 3DVM overlapping during RAPN, thus improving the accuracy of the superimposition process.