Surgical Endoscopy最新文献

Background

The European Society of Gastroenterology and Endoscopy recommends a primarily flexible endoscopic approach for the treatment of Zenker’s diverticulum. Due to the rarity of the disorder, evidence for its effectiveness and safety comes mainly from small, retrospective, single-center studies.

Methods

In this retrospective, observational, multicenter cohort study, data from six German tertiary referral centers were analyzed. The primary outcome parameters were technical and clinical success; among the secondary outcomes, the rates of adverse events (AE) and re-admission with symptomatic recurrence and mortality were the most relevant.

Results

Between 2003 and 2024, 384 treatments were performed in 327 patients (61.8% male, mean age 74.70 (± 10.60)). Incision methods/techniques were 250 needle knives, 44 ESD knives, 64 stag beetle knives, 24 staplers, one APC-probe, and one Z-POEM. The Zenker’s diverticulum overtube was used in 65.1%, prophylactic clipping in 30.2%, and antibiotic therapy in 25.3% of treatments. The rates of technical and clinical success were 99.2% and 97.4%, and the rates of AE and re-admission with symptomatic recurrence were 11.2% and 16.7%, respectively. Mortality was 0.3%. Comparative subgroup analyses of 312 diverticula without prior treatment versus 72 symptomatic recurrences and incision methods/techniques showed no significant differences in outcome parameters. The use of additional devices and prophylactic measures (clipping, antibiotic therapy) were not independent predictors of technical/clinical success or AE in uni-/multivariable regression analysis.

Conclusions

Flexible endoscopic Zenker’s diverticulotomy is a safe and effective minimally invasive treatment. Recurrences can be treated by flexible endoscopy with comparable results. None of the cutting methods, ancillary devices, or prophylactic measures showed superiority in effectiveness or safety.

Graphical abstract

Background

The type of facility where patients with colon cancer are treated may play a significant role in their outcomes. We aimed to investigate the influence of facility types included in the National Cancer Database (NCDB) on surgical outcomes of colon cancer.

Methods

Retrospective cohort analysis of all patients with stage I–III colon cancer included in the NCDB database between 2010 and 2019 was performed. Patients were grouped based on facility type: Academic/Research Programs (ARP), Community Cancer Programs (CCP), Comprehensive Community Cancer Programs (CCCP), and Integrated Network Cancer Programs (INCP). Study outcomes included overall survival, 30- and 90-day mortality, 30-day readmission and conversion to open surgery.

Results

125,935 patients were included with a median age of 68.7 years (50.5% females). Most tumors were in the right colon (50.6%). Patient were distributed among facility types as ARP (n = 34,321, 27%), CCP (n = 12,692, 10%), CCCP (n = 54,356, 43%), and INCP (n = 24,566, 19%). In terms of surgical approach, laparoscopy was more commonly used in ARP (46%) (p < 0.001). Laparotomy was more common in CCP (58.7%) (p < 0.001), and conversely, CCP had the least amount of robotic surgery (3.9%) (p < 0.001). Median overall survival was highest in ARP (129 months, 95% CI 127.4–134.1) and lowest in CCP (103.7 months, 95% CI 100.1–106.7) (p < 0.001). Conversion rates were comparable between ARP (12%), CCCP (12%) and INCP (11.8%) but were higher in CCP (15.5%) (p < 0.001). 30-day readmission rates and 30-day mortality rates were significantly lower in ARP compared to other facility types (p < 0.001).

Conclusion

Our findings display differences in surgical outcomes of colon cancer patients among facility types. The findings suggest better outcomes in terms of operative access and survival at ARP as compared to other facilities. These findings underscore the importance of understanding facility-specific factors that may influence patient outcomes and can guide resource allocation and targeted interventions for improving colon cancer care.

Background

The neural mechanisms underlying differences in the performance of simulated arthroscopic skills across various skill levels remain unclear. Our primary objective is to investigate the learning mechanisms of simulated arthroscopic skills using functional near-infrared spectroscopy (fNIRS).

Methods

We recruited 27 participants, divided into three groups: novices (n = 9), intermediates (n = 9), and experts (n = 9). Participants completed seven arthroscopic tasks on a simulator, including diagnostic navigation, triangulation, grasping stars, diagnostic exploration, meniscectomy, synovial membrane cleaning, and loose body removal. All tasks were videotaped and assessed via the simulator system and the Arthroscopic Surgical Skill Evaluation Tool (ASSET), while cortical activation data were collected using fNIRS. Simulator scores and ASSET scores were analyzed to identify different level of performance of all participants. Brain region activation and functional connectivity (FC) of different types of participants were analyzed from fNIRS data.

Results

Both the expert and intermediate groups scored significantly higher than the novice group (p < 0.001). There were significant differences in ASSET scores between experts and intermediates, experts and novices, and intermediates and novices (p = 0.0047, p < 0.0001, p < 0.0001), with the trend being experts > intermediates > novices. The intermediate group exhibited significantly greater activation in the left primary motor cortex (LPMC) and left prefrontal cortex (LPFC) compared to the novice group (p = 0.0152, p = 0.0021). Compared to experts, the intermediate group demonstrated significantly increased FC between the presupplementary motor area (preSMA) and the right prefrontal cortex (RPFC; p < 0.001). Additionally, the intermediate group showed significantly increased FC between the preSMA and LPFC, RPFC and LPFC, and LPMC and LPFC compared to novices (p = 0.0077, p = 0.0285, p = 0.0446).

Conclusion

Cortical activation and functional connectivity reveal varying levels of activation intensity in the PFC, PMC, and preSMA among novices, intermediates, and experts. The intermediate group exhibited the highest activation intensity.

Background

The absence of force feedback (FFB) is considered a technical limitation in robotic-assisted surgery (RAS). This pre-clinical study aims to evaluate the forces applied to tissues using a novel integrated FFB technology, which allows surgeons to sense forces exerted at the instrument tips.

Methods

Twenty-eight surgeons with varying experience levels employed FFB instruments to perform three robotic-assisted surgical tasks, including retraction, dissection, and suturing, on inanimate or ex-vivo models, while the instrument sensors recorded and conveyed the applied forces to the surgeon hand controllers of the robotic system. Generalized Estimating Equations (GEE) models were used to analyze the mean and maximal forces applied during each task with the FFB sensor at the “Off” setting compared to the “High” sensitivity setting for retraction and to the “Low”, “Medium”, and “High” sensitivity settings for dissection and suturing. Sub-analysis was also performed on surgeon experience levels.

Results

The use of FFB at any of the sensitivity settings resulted in a significant reduction in both the mean and maximal forces exerted on tissue during all three robotic-assisted surgical tasks (p < 0.0001). The maximal force exerted, potentially associated with tissue damage, was decreased by 36%, 41%, and 55% with the use of FFB at the “High” sensitivity setting while performing retraction, dissection, and interrupted suturing tasks, respectively. Further, the use of FFB resulted in substantial reductions in force variance during the performance of all three types of tasks. In general, reductions in mean and maximal forces were observed among surgeons at all experience levels. The degree of force reduction depends on the sensitivity setting selected and the types of surgical tasks evaluated.

Conclusions

Our findings demonstrate that the utilization of FFB technology integrated in the robotic surgical system significantly reduced the forces exerted on tissue during the performance of surgical tasks at all surgeon experience levels. The reduction in the force applied and a consistency of force application achieved with FFB use, could result in decreases in tissue trauma and blood loss, potentially leading to better clinical outcomes in patients undergoing RAS. Future studies will be important to determine the impact of FFB instruments in a live clinical environment.

Introduction

Laparoscopic cholecystectomy is one of the most frequently performed procedures by general surgeons. Strategies for minimizing bile duct injuries including use of the critical view of safety method, as outlined by the SAGES Safe Cholecystectomy Program, are not always possible. Subtotal cholecystectomy has emerged as a safe “bail-out” maneuver to avoid iatrogenic bile duct injury in these difficult cases. Strasberg and colleagues defined two main types of subtotal cholecystectomies: reconstituting and fenestrating. As there is a paucity of studies comparing the two subtypes of laparoscopic subtotal cholecystectomy (LSC), we performed a systematic review and meta-analysis comparing the reconstituting and fenestrating techniques for managing the difficult gallbladder.

Methods

A search of PubMed, Embase, and Cochrane databases was conducted to identify prospective and retrospective studies comparing fenestrating and reconstituting LSC. The outcomes of interest were bile leak, reoperation, readmissions, completion cholecystectomy, postoperative ERCP, and retained CBD stones.

Results

We screened 2855 studies and included 13 studies with a total population of 985 patients. Among them, 330 patients (33.5%) underwent reconstituting LSC and 655 patients (55.5%) underwent fenestrating LSC. Twelve studies were retrospective, and one was prospective. Notably, reconstituting STC was associated with decreased incidence of bile leak (OR 0.29; CI 95% 0.16–0.55; p = 0.0002; I² = 36%). We also noted increased rates of postoperative ERCP with fenestrating STC in sensitivity analysis (OR 0.32; CI 95% 0.16–0.64; p = 0.001; I² = 31%). In addition, there was no difference between the two techniques regarding the rates of completion of cholecystectomy, reoperation, readmission, and retained CBD stones.

Conclusions

Fenestrating LSC leads to a higher incidence of postoperative bile leakage. In addition, our sensitivity analysis revealed that the fenestrating technique is associated with a higher incidence of postoperative ERCP. Further randomized trials and studies with longer-term follow-up are still necessary to better understand these techniques in the difficult gallbladder cases.

Background

The role of gastroesophageal reflux in progressive lung damage is increasingly recognized. We have proposed, based on our work with lung transplant recipients, a novel immune mechanism of pulmonary injury after aspiration of gastric contents, during which higher levels of normally sequestered lung self-antigens (SAgs) collagen V (Col-V) and K-alpha-1 tubulin (Kα1T) in circulating small extracellular vesicles (EVs) induce the production of self-antibodies (SAbs) anti-Col-V and anti-Kα1T. Thus, we aimed to determine whether levels of SAbs or SAgs increased in an animal model of aspiration-induced lung damage in a nontransplant setting.

Methods

We created a murine model of repetitive lung aspiration using C57BL/6J mice. Mice were aspirated weekly with 1 mL/kg of hydrochloric acid (n = 9), human gastric contents (n = 9), or combined (1:1) fluid (n = 9) once, three, or six times (n = 3 in each subgroup; control group, n = 9). Blood samples were periodically obtained, and all animals were sacrificed at day 90 for pathological assessment. SAbs were measured using an enzyme-linked immunosorbent assay; SAgs and NF-κB contained in small EVs were assessed by western blot.

Results

Aspirated mice weighed significantly less than controls throughout the study and had histological evidence of pulmonary injury at day 90. Overall, aspirated mice developed higher concentrations of anti-Col-V at day 28 (53.9 ± 28.7 vs. 29.9 ± 4.5 ng/mL, p < 0.01), day 35 (42.6 ± 19.8 vs. 28.6 ± 7.2 ng/mL, p = 0.038), and day 90 (59.7 ± 27.7 vs. 34.1 ± 3.2 ng/mL, p = 0.014) than the control group. Circulating small EVs isolated from aspirated mice on day 90 contained higher levels of Col-V (0.7 ± 0.56 vs. 0.18 ± 0.6 m.o.d., p = 0.009) and NF-κB (0.42 ± 0.27 vs. 0.27 ± 0.09 m.o.d., p = 0.095) than those from controls.

Conclusions

This experimental study supports the theory that gastroesophageal reflux leads to the development of lung damage and an increase of humoral markers that may serve as noninvasive biomarkers to detect asymptomatic lung injury among patients with gastroesophageal reflux disease.

Background

The impact of metabolic dysfunction-associated fatty liver disease (MAFLD) on laparoscopic liver resection (LLR) for hepatocellular carcinoma (HCC) remains unclear. This study aimed to compare the outcomes of LLR for MAFLD-HCC and Non-MAFLD-HCC.

Methods

Patients with HCC who received LLR between October 2017 and July 2021 were enrolled. Inverse probability of treatment weighting (IPTW) was used to generate adjusted comparisons. Both short- and long-term outcomes were evaluated accordingly.

Results

A total of 887 patients were enrolled, with 140 in MAFLD group and 747 in Non-MAFLD group. After IPTW adjustment, baseline factors were well matched. The MAFLD group was associated with more blood loss (210 vs 150 ml, p = 0.022), but with similar postoperative hospital stays and complication rates. The 1- and 3-year overall survival rates were 97.4% and 92.5% in MAFLD group, and 97.5% and 88.3% in Non-MAFLD group, respectively (p = 0.14). The 1- and 3-year disease-free survival rates were 84.8% and 62.9% in MAFLD group, and 80.2% and 58.8% in Non-MAFLD group, respectively (p = 0.31).

Conclusions

LLR for MAFLD-HCC was associated with more blood loss but with comparable postoperative recovery and long-term survival compared with Non-MAFLD-HCC patients. LLR is feasible and safe for HCC patients with MAFLD background.

Graphical abstract

Introduction

Weight recurrence (WR) affects > 20% of patients following Roux-en-Y gastric bypass (RYGB). Shortening of the common channel (CC) after RYGB (distal bypass) has been proposed for additional weight loss in patients with WR, but results vary, and concerns for vitamin deficiencies/malnutrition exist. Our aim was to determine whether the percentage of bowel bypassed after distal bypass is associated with the amount of postoperative weight loss.

Methods

Patients undergoing distal bypass between 2018 and 2022 were reviewed. Small bowel limb lengths before and after distal bypass were measured, and the percentage of bypassed bowel was calculated (= bypassed biliopancreatic limb/total small bowel length). Patients were dichotomized into two groups based on the percentage bypassed bowel (≤ 50% vs. > 50%). Weight loss (measured as excess BMI loss; EBIL%), comorbidities resolution, complications, and nutritional deficiencies were reviewed.

Results

Thirty female patients underwent distal bypass during the study period. After distal bypass, the Roux was lengthened to 150 cm (75–175 cm) from 75 cm (20–200 cm), and the CC shortened to 150 cm (100–310 cm) from 510 cm (250–1000 cm). These changes resulted in an increase in the size of the bypassed biliopancreatic limb from 40 cm (15–90 cm) to 330 cm (180–765 cm) and a total alimentary limb (TALL; Roux + CC) shortening from 590 cm (400–1075 cm) to 300 cm (250–400 cm). The group with > 50% bowel bypassed had higher EBIL%. Overall EBIL% was 36.9 ± 14.7%, 53.3 ± 25.6%, and 62.1 ± 36.9% at 0.5, 1, and 2 years, respectively. There were minimal vitamin deficiencies. Diabetes resolved in 100% (n = 3/3), HTN in 67% (n = 10/15), and GERD in 73% (n = 11/15). Complication rate was 23%. No reintervention for malnutrition or vitamin deficiencies was required.

Conclusions

Distal bypass effectively leads to considerable weight loss and comorbidity improvement in patients with WR after RYGB, but the amount of weight loss depends on the percentage of bypassed bowel. An exact threshold of bypassed bowel that optimizes weight loss outcomes and simultaneously minimizes the nutritional complications needs to be determined. Meanwhile, close monitoring for vitamin deficiencies is recommended.

Background

Robotic retromuscular ventral hernia repair (rRMVHR) potentially combines the best features of open and minimally invasive VHR: myofascial release with abdominal wall reconstruction (AWR) with the lower wound morbidity of laparoscopic VHR. Proliferation of this technique has outpaced the data supporting this claim. We report 2-year outcomes of the first randomized controlled trial of oRMVHR vs rRMVHR.

Methods

Single-center randomized control trial of open vs rRMVHR. 100 patients were randomized (50 open, 50 robotic). We included patients > 18 y/o with hernias 7–15 cm with at least one of the following: diabetes, chronic obstructive pulmonary disease (COPD), body mass index (BMI) ≥ 30, or current smokers. Primary outcome was occurrence of a composite outcome of surgical site infection (SSI), non-seroma surgical site occurrence (SSO), readmission, or hernia recurrence. Secondary outcomes were length of stay, any SSI or SSO, SSI/SSOPI, operative time, patient reported quality of life, and cost. Analysis was performed in an intention-to-treat fashion. Study was funded by a grant from Society of American Gastrointestinal and Endoscopic Surgeons.

Results

90 patients were available for 30-day and 62 for 2-year analysis (rRMVHR = 46 and 32, oRMVHR = 44 and 30). Hernias in the open group were slightly larger (10 vs 8 cm, p = 0.024) and more likely to have prior mesh (36.4 vs 15.2%; p = 0.030), but were similar in length, prior hernia repairs, mesh use, and myofascial release. There was no difference in primary composite outcome between oRMVHR and rRMVHR (20.5 vs 19.6%, p = 1.000). Median length of stay was shorter for rRMVHR (1 vs 2 days; p < 0.001). All patients had significant improvement in quality of life at 1 and 2 years. Other secondary outcomes were similar.

Conclusion

There is no difference in a composite outcome including SSI, SSOPI, readmission, and hernia recurrence between open and robotic RMVHR.

Graphical abstract

Aim

The study objective was to evaluate the primary feasibility of endoscopic submucosal resection (ESD) and endoscopic full-thickness resection (EFTR) via balloon-assisted enteroscopy (BAE) to treat small bowel subepithelial lesions (SELs).

Method

A retrospective case series study was performed. The first fifteen consecutive patients who underwent ESD (n = 10) and EFTR (n = 5) via BAE to remove small bowel SELs from November 2016 to December 2023 were included. The main outcome measures were the technique success rate, operative time and complication rate.

Results

This research focused on 15 cases of jejunoileal SELs, four cases of lipomyoma, three cases of ectopic pancreas, two cases of NETs, three cases of benign fibrous tumours and three cases of angioma. The overall technique success rate was 86.7%, with 100% (10/10) and 60% (3/5) for BAE-ESD and BAE-EFTR, respectively, in removing small bowel SELs. Two cases of EFTR failed, as the BAE operation was unsuitable for tumour resection and suture repair of a perforated wound. No serious bleeding or any postoperative complications occurred. The median time of endoscopic resection via BAE for SELs was 44 min (range 22–68 min).

Conclusion

ESD and EFTR via BAE might be alternative choices for treating small SELs in the small bowel, with the advantages of clear and accurate positioning and minimal invasiveness. However, its superiority over surgery still needs to be further investigated.