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Effectiveness of Strategy-Focused Training in Colorectal Endoscopic Submucosal Dissection: A Retrospective Observational Study

内镜黏膜下剥离术 观察研究 解剖(医学) 医学 普通外科 回顾性队列研究 外科 内科学
作者
Hideyuki Chiba,Ken Ohata,Keiichi Ashikari,Jun Tachikawa,Nagaya Okada,Akira Hayashi,Yu Ebisawa,Mikio Kobayashi,Jun Arimoto,Hiromichi Kuwabara,Michiko Nakaoka
出处
期刊:Research Square - Research Square
标识
DOI:10.21203/rs.3.rs-3990882/v1
摘要

Abstract Background Colorectal ESD, an advanced minimally invasive treatment, presents technical challenges, with globally varying training methods. We analyzed the learning curve of ESD training, emphasizing preoperative strategies, notably gravity traction, to guide ESD instructors and trainee programs. Method This retrospective study included 881 cases guided by an experienced supervisor. Six trainees received “strategy-focused” instruction. To evaluate the number of ESD experiences in steps, the following phases were classified based on ESD experiences of each trainees: Phase 0 (0–50 ESD), Phase 1 (51–100 ESD), Phase 2 (101–150 ESD), and Phase 3 (151–200 ESD). Lesion background, outcomes, and safety were compared across phases. Factors contributing to technical difficulty in early (Phase 0 and 1) and late phases (Phase 2 and 3) were identified, along with the utility of traction ESD with device assistance. Result Treatment outcomes were favorable, with 99.8% and 94.7% en bloc resection and curative resection rates, respectively. Approximately 90% self-completion rate could be achieved after experiencing about 50 cases (92.7% in Phase 1), signifying proficiency growth despite increased case difficulty. In early phases, factors such as right-sided colon, LST-NG morphology, and mild and severe fibrosis pose challenges. In late phases, mild and severe fibrosis remained significant. Traction-assisted ESD, utilized in 3% of cases, comprised planned (1.1%) and rescue (1.9%) methods. Planned traction aided specific lesions, while rescue traction was common in the right colon. Conclusion "Strategy-focused" ESD training consistently yields successful outcomes, effectively adapting to varying difficulty factors in different proficient stages.
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