title: Endoscopic submucosal dissection of large colorectal tumors by using a novel spring-action S-O clip for traction (with video).
abstract: BACKGROUND
  Endoscopic submucosal dissection (ESD) allows en bloc resection of large GI neoplasms, regardless of their size; however, technical difficulties associated with ESD in the colorectum make it less widely applied in the treatment of tumors in this region. To address this difficulty, we designed a rubber strip-based traction device, called the S-O clip (Sakamoto-Osada clip) and reported previously that ESD with this device was effective for complete resection of large, superficial colorectal neoplasms. In this report, we describe a novel spring-action version of the S-O clip (spring S-O clip) that improves the facility of clip use during ESD of colorectal tumors.
  
  
  OBJECTIVE
  To evaluate the efficacy and safety of the spring S-O clip for ESD of colorectal neoplasms.
  
  
  METHODS
  Case series.
  
  
  METHODS
  Juntendo University Hospital.
  
  
  METHODS
  The efficacy and safety of the spring S-O clip traction device during ESD of colorectal tumors.
  
  
  RESULTS
  In 3 cases, a large, superficial neoplasm in the right side of the colon was removed safely and successfully en bloc without complication. Procedure times for the 3 cases were 44, 27, and 49 minutes, with resected specimens measuring 40, 24, and 35 mm, respectively.
  
  
  CONCLUSIONS
  Uncontrolled study.
  
  
  CONCLUSIONS
  This limited case series demonstrates that spring S-O clip-assisted ESD is safe and effective for en bloc resection of large superficial neoplasms in the right side of the colon.
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan. sakamoto@juntendo.ac.jp
authors.forename: Naoto
authors.initials: N
authors.lastname: Sakamoto
authors.forename: Taro
authors.initials: T
authors.lastname: Osada
authors.forename: Tomoyoshi
authors.initials: T
authors.lastname: Shibuya
authors.forename: Kazuko
authors.initials: K
authors.lastname: Beppu
authors.forename: Kenshi
authors.initials: K
authors.lastname: Matsumoto
authors.forename: Hiroki
authors.initials: H
authors.lastname: Mori
authors.forename: Masato
authors.initials: M
authors.lastname: Kawabe
authors.forename: Akihito
authors.initials: A
authors.lastname: Nagahara
authors.forename: Michiro
authors.initials: M
authors.lastname: Otaka
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Ogihara
authors.forename: Sumio
authors.initials: S
authors.lastname: Watanabe
mesh_terms: D000368:Aged; D003106:Colon / Q000601:surgery; D003113:Colonoscopy / Q000379:methods*; D015179:Colorectal Neoplasms / Q000601:surgery*; D004210:Dissection; D005260:Female; D006801:Humans; D007413:Intestinal Mucosa / Q000601:surgery; D008297:Male; D008875:Middle Aged; D013525:Surgical Instruments; D014143:Traction / Q000295:instrumentation*; D016896:Treatment Outcome; D014741:Video Recording