title: Dual-design expandable colorectal stent for malignant colorectal obstruction: comparison of flared ends and bent ends.
abstract: OBJECTIVE
  The purpose of this study was to compare, focusing on colonic perforation and stent migration, the clinical safety and efficacy of dual-design expandable colorectal stents with flared ends with those of stents with bent ends in the treatment of patients with malignant colorectal obstruction.
  
  
  METHODS
  A total of 122 patients with malignant colorectal obstruction underwent implantation of dual-design stents with flared (n = 69) or bent (n = 53) ends.
  
  
  RESULTS
  Stent placement was technically successful in 116 of 122 patients (95.1%), 65 of 69 patients (94.2%) with flared-end stents and 51 of 53 patients (96.2%) with bent-end stents (p > 0.05). Clinical success was achieved within 2 days in 61 of 65 patients (93.8%) with bent-end stents and in 46 of 51 patients (90.2%) with flared-end stents (p > 0.05). Complications included seven cases of colonic perforation (6%), seven cases of stent migration (6%), three cases of tumor overgrowth (2.6%), four cases of severe rectal pain (3.4%), and four cases of bleeding (3.4%). There were no significant differences between the rates of colonic perforation and stent migration in the two groups (6.2% vs 5.9%), and the overall complication rates were similar (p > 0.05).
  
  
  CONCLUSIONS
  Dual-design expandable colorectal stents with flared ends and those with bent ends are equally safe and effective, having similar perforation and migration rates.
authors: Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnap-2dong, Songpa-gu, Seoul 138-736, Republic of Korea.
authors: Jin Hyoung
authors: JH
authors: Kim
authors: Ho-Young
authors: HY
authors: Song
authors: Yong-Dong
authors: YD
authors: Li
authors: Ji Hoon
authors: JH
authors: Shin
authors: Jung-Hoon
authors: JH
authors: Park
authors: Chang-Sik
authors: CS
authors: Yu
authors: Jin Cheon
authors: JC
authors: Kim
mesh_terms: D015179:Colorectal Neoplasms / Q000150:complications* / Q000601:surgery*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D007415:Intestinal Obstruction / Q000209:etiology* / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D015607:Stents; D016896:Treatment Outcome