title: A novel, ring-connected stent versus conventional GI stents: comparative study of physical properties and migration rates in a canine colon obstruction model.
abstract: BACKGROUND
  Migration of stents is one of the most common adverse events in covered stent placement in GI tract obstruction.
  
  
  OBJECTIVE
  To compare physical property and migration rates in a canine colon obstruction model among a novel stent and conventional stents.
  
  
  METHODS
  Comparative physical test and animal study.
  
  
  METHODS
  Medical device testing laboratory and animal laboratory.
  
  
  METHODS
  Mongrel dogs (N=26).
  
  
  METHODS
  Surgical colon obstruction followed by placement of a novel (n=13) or conventional (n=13) stent.
  
  
  METHODS
  Physical properties, migration, and adverse events.
  
  
  RESULTS
  The novel stent showed better flexibility, as in a physical test of longitudinal compressibility and axial force, than did conventional stents, and it withstood the fatigue test for 10 days. In terms of radial force and tensile strength, the novel stent showed the same or better results than conventional stents. In a canine colon obstruction model, the migration rate of a novel stent was significantly lower than that of a conventional stent (2/13, 15.4% vs 8/13, 61.5%; P=.008).
  
  
  CONCLUSIONS
  Animal study of limited size.
  
  
  CONCLUSIONS
  The novel, ring-connected stent is more flexible and more resistant to migration than the conventional stents.
authors: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: Hong Suk
authors: HS
authors: Park
authors: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: In Wook
authors: IW
authors: Choo
authors: Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Republic of Korea.
authors: Soowon
authors: S
authors: Seo
authors: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: Dongho
authors: D
authors: Hyun
authors: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: Sooyoun
authors: S
authors: Lim
authors: Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: Jae J
authors: JJ
authors: Kim
authors: Laboratory Animal Research Center, Samsung Biomedical Research Institute, Seoul, Republic of Korea.
authors: Saet-Byul
authors: SB
authors: Hong
authors: Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: Byung-Hoon
authors: BH
authors: Min
authors: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: Young Soo
authors: YS
authors: Do
authors: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: Sung Wook
authors: SW
authors: Choo
authors: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: Sung Wook
authors: SW
authors: Shin
authors: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: Kwang Bo
authors: KB
authors: Park
authors: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors: Sung Ki
authors: SK
authors: Cho
mesh_terms: D000818:Animals; D003108:Colonic Diseases / Q000601:surgery*; D004195:Disease Models, Animal; D004285:Dogs; D004867:Equipment Design / Q000295:instrumentation*; D005548:Foreign-Body Migration / Q000209:etiology / Q000517:prevention & control*; D007415:Intestinal Obstruction / Q000601:surgery*; D019919:Prosthesis Implantation / Q000009:adverse effects*; D015607:Stents / Q000009:adverse effects*; D016896:Treatment Outcome