{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T18:24:03Z","timestamp":1789496643274,"version":"build-2803163510"},"reference-count":20,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T00:00:00Z","timestamp":1770681600000},"content-version":"vor","delay-in-days":9,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,2,1]],"date-time":"2026-02-01T00:00:00Z","timestamp":1769904000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001839","name":"University Grants Committee","doi-asserted-by":"publisher","award":["14200623"],"award-info":[{"award-number":["14200623"]}],"id":[{"id":"10.13039\/501100001839","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001839","name":"University Grants Committee","doi-asserted-by":"publisher","award":["14214322"],"award-info":[{"award-number":["14214322"]}],"id":[{"id":"10.13039\/501100001839","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001839","name":"University Grants Committee","doi-asserted-by":"publisher","award":["C4042\u201023GF"],"award-info":[{"award-number":["C4042\u201023GF"]}],"id":[{"id":"10.13039\/501100001839","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003452","name":"Innovation and Technology Commission","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100003452","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Digestive Endoscopy"],"published-print":{"date-parts":[[2026,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Endoscopic submucosal dissection (ESD) is technically demanding with the main limitation on the lack of effective countertraction. Existing countertraction methods such as clip\u2010related techniques only provide unidirectional static traction force that may restrict their utility in complicated colorectal ESD. The magnetic countertraction system provides dynamic force by manipulating an external magnetic source. We designed a novel magnetic countertraction system with an internal magnet retractor introducible via the endoscopy channel and the external magnetic effector mounted on a robotic arm that could be easily manipulated. We evaluated the performance and safety of the system in an ex\u00a0vivo randomized crossover study. ESD was performed on ex\u00a0vivo porcine colon models with standardized 3\u2009cm target lesions marked at gravity\u2010dependent locations. Endoscopists performed the ESD in pairs, randomized to magnetic countertraction (MAG\u2010ESD) or conventional ESD (C\u2010ESD) first to minimize bias from the learning effect. During MAG\u2010ESD, a flexible internal magnetic retractor was deployed via the endoscopic channel and anchored to the lesion margin. A robotic arm\u2010mounted external permanent magnet (EPM) was positioned above the colon model to engage the retractor and provide dynamic countertraction. Seventy\u2010two ESD (36 MAG\u2010ESD and 36 C\u2010ESD) were performed by 18 endoscopists. MAG\u2010ESD significantly reduced procedure time by 20.4% (\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.0002) and workload (NASA\u2010TLX mean difference: \u221219.81, 95% CI: \u221225.42 to \u221214.19). All procedures achieved en bloc resection. MAG\u2010ESD had significantly fewer complications (OR\u2009=\u20090.782, 95% CI: 0.644\u20130.949), including lower rates of perforation and muscle injury. The novel magnetic countertraction system significantly improved procedural efficiency, reduced operator workload, and enhanced safety in ex\u00a0vivo colonic ESD.\n                  <\/jats:p>","DOI":"10.1111\/den.70120","type":"journal-article","created":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T08:16:30Z","timestamp":1770711390000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Novel Magnetic Countertraction Enhanced Performance in Colonic Endoscopic Submucosal Dissection: An Ex\u00a0Vivo Crossover Study (With Video)"],"prefix":"10.1111","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1041-9668","authenticated-orcid":false,"given":"Hon Chi","family":"Yip","sequence":"first","affiliation":[{"name":"Department of Surgery, Faculty of Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Faculty of Medicine, Institute of Digestive Disease The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Multi\u2010Scale Medical Robotics Center The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wai Shing","family":"Chan","sequence":"additional","affiliation":[{"name":"Department of Surgery, Faculty of Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Siew Fung","family":"Hau","sequence":"additional","affiliation":[{"name":"Department of Surgery, Faculty of Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicole Miu\u2010yee","family":"Cheng","sequence":"additional","affiliation":[{"name":"Department of Surgery, Faculty of Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4163-4531","authenticated-orcid":false,"given":"Louis Ho\u2010Shing","family":"Lau","sequence":"additional","affiliation":[{"name":"Faculty of Medicine, Institute of Digestive Disease The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Department of Medicine and Therapeutics, Faculty of Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Li Ka Shing Institute of Health Sciences The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simon","family":"Chu","sequence":"additional","affiliation":[{"name":"Department of Surgery, Faculty of Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong 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University of Hong Kong  Hong Kong SAR Hong Kong"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zheng","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Surgery, Faculty of Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Multi\u2010Scale Medical Robotics Center The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Li Ka Shing Institute of Health Sciences The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Chow Yuk ho Technology Center for Innovative Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simon Siu\u2010man","family":"Ng","sequence":"additional","affiliation":[{"name":"Department of Surgery, Faculty of Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Faculty of Medicine, Institute of Digestive Disease The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philip Wai\u2010yan","family":"Chiu","sequence":"additional","affiliation":[{"name":"Department of Surgery, Faculty of Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Faculty of Medicine, Institute of Digestive Disease The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Multi\u2010Scale Medical Robotics Center The Chinese University of Hong Kong  Hong Kong SAR Hong Kong"},{"name":"Chow Yuk ho Technology Center for Innovative Medicine The Chinese University of Hong Kong  Hong Kong SAR Hong 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