href="#ulink_95296274-b360-5337-ac6b-0c9d77aa539d">Introduction Endoscopic mucosal resection Endoscopic submucosal dissection Post‐EMR and post‐ESD management Management of complications When to use EMR and when ESD? Training and first steps in ESD Endoscostrapic Full Thickness Resection using the Ovesco eFTRD® system Conclusions and perspectives Videos References 20 Mucosal Ablation Techniques Introduction Procedures and equipment involved in mucosal ablation Prerequisite cognitive and technical skills for trainees prior to learning mucosal ablation Setting of training Specific knowledge trainees must acquire during training to perform esophageal mucosal ablation Equipment and technical steps Opportunities and methods for training in mucosal ablation Defining competency Maintaining skill level Videos References 21 Complicated Polypectomy Patient assessment and consent Timing Endoscopy Team General principles The electrosurgical unit Carbon dioxide Snares for polypectomy The snare handle as an information center Safety in snare handling Techniques for successful removal of sessile polyps Special techniques for sessile polyps Pedunculated polyps Fluid injection The non‐lifting lesion Retroflexion EMRC Lesions involving the ileocecal valve Lesions at the appendiceal orifice Lesions at the anorectal junction (Video 21.8) Circumferential lesions Endoscopic submucosal dissection (Videos 21.9 and 21.10) Endoscopic full thickness resection Adjuvant thermal ablation of the resection margin Defect closure with mechanical clips Deep mural injury Surveillance Two‐stage EMR Adverse events associated with complex polypectomy Training and achieving competency in endoscopic tissue resection Summary Videos References 22 Training and Credentialing in Natural Orifice Transluminal Endoscopic Surgery (NOTES) Training Credentialing Conclusion References 23 Training in Bariatric Endoscopy Bariatric endoscopy procedures Training goals Infrastructure and personnel Pre‐procedural assessment Equipment Procedural considerations and techniques Bariatric endoscopy procedures Endoscopic management of post‐bariatric surgery complications Revisional procedures for weight regain Primary bariatric and metabolic procedures Defining competency for particular skill Conclusion References 24 Repair of Mucosal Defects Introduction Learning to close perforations
