title: A simple novel endoscopic successive suture device: a validation study for closure strength and reproducibility.
abstract: OBJECTIVE
  Endoscopic surgical technology has been developing rapidly. Although several successful endoscopic closure devices have already been introduced, only a few of them have demonstrated improvements in closure strength and reproducibility over conventional endoscopic clip closures or hand sutures. The objective of this study was to test the feasibility of a novel successive suturing device (SSD) by measuring closure strength and reproducibility.
  
  
  METHODS
  Porcine stomach models were used in this study. Endoclips, full-thickness hand sutures, and the novel SSD sutures were used to close a perforation in the stomach wall, with 10 stomachs being tested for each closure method. Endoclips and SSD sutures were performed using a two-channel endoscope, and the hand sutures were performed from outside of the stomach wall. Air leakage pressure was measured to determine the closure strength and reproducibility of each method.
  
  
  RESULTS
  The mean air leakage pressure of the SSD closure was 62.7 ± 8.2 mmHg. SSD-treated stomachs exhibited significantly greater air leakage pressure than Endoclip-treated stomachs. The standard deviation of bursting pressure in SSD stomachs was found to be significantly smaller than that of hand-sewn stomachs but was not different from that of Endoclip stomachs.
  
  
  CONCLUSIONS
  The consistent closure strength of SSD stomachs demonstrated the reliability and reproducibility of this new closure method. These promising results in closure strength and reproducibility suggest the feasibility of the proposed device for clinical applications.
authors.affiliation: Department of Mechanical Engineering, Korea University, Seoul, Korea.
authors.forename: Y
authors.initials: Y
authors.lastname: Song
authors.forename: H S
authors.initials: HS
authors.lastname: Choi
authors.forename: K
authors.initials: K
authors.lastname: Kim
authors.forename: Y
authors.initials: Y
authors.lastname: Kim
authors.forename: B G
authors.initials: BG
authors.lastname: Kim
authors.forename: D
authors.initials: D
authors.lastname: Hong
authors.forename: B
authors.initials: B
authors.lastname: Keum
authors.forename: H J
authors.initials: HJ
authors.lastname: Chun
mesh_terms: D000818:Animals; D005773:Gastroscopy / Q000295:instrumentation; D005774:Gastrostomy; D011312:Pressure; D015203:Reproducibility of Results; D013270:Stomach / Q000601:surgery*; D013536:Suture Techniques / Q000295:instrumentation*; D013552:Swine