title: Safety and efficacy of a partially covered self-expandable metal stent in benign pyloric obstruction.
abstract: OBJECTIVE
  To evaluate the safety and efficacy of partially covered self-expandable metallic stents (SEMSs) in benign pyloric obstruction.
  
  
  METHODS
  We retrospectively analyzed data from 10 consecutive patients with peptic ulcer-related pyloric obstructive symptoms (gastric outlet obstruction scoring system (GOOSS) score of 1) between March 2012 and September 2013. The patients were referred to and managed by partially covered SEMS insertion in our tertiary academic center. We assessed the technical success, symptom improvement, and adverse events after stenting.
  
  
  RESULTS
  Early symptoms were improved just 3 d after SEMS placement in all 10 patients. The GOOSS score of all patients improved from 1 to 3. There were no serious immediate adverse events. The overall rate of being symptom free was 90% at a median of 11 mo of follow-up (range: 4-43 mo). Five patients were managed by a rescue SEMS because of failure of previous endoscopic balloon dilatation. Among them, four patients had sustained symptom improvement after the SEMS procedure. During the follow-up period, migration of the SEMS was observed in two patients (20.0%), both of whom had previous endoscopic balloon dilatation before SEMS insertion.
  
  
  CONCLUSIONS
  Despite the small number in this study, partially covered SEMSs showed a favorable and safe outcome in the treatment of naïve benign pyloric obstruction and in salvage treatment after balloon dilatation failure.
authors.affiliation: Jun Heo, Min Kyu Jung, Division of Gastroenterology and Hepatology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu 700712, South Korea.
authors.forename: Jun
authors.initials: J
authors.lastname: Heo
authors.affiliation: Jun Heo, Min Kyu Jung, Division of Gastroenterology and Hepatology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu 700712, South Korea.
authors.forename: Min Kyu
authors.initials: MK
authors.lastname: Jung
mesh_terms: D000368:Aged; D004106:Dilatation / Q000379:methods; D005260:Female; D005548:Foreign-Body Migration / Q000209:etiology; D005773:Gastroscopy / Q000009:adverse effects / Q000295:instrumentation*; D006801:Humans; D008297:Male; D008670:Metals; D008875:Middle Aged; D010437:Peptic Ulcer / Q000150:complications* / Q000175:diagnosis; D011474:Prosthesis Design; D011707:Pyloric Stenosis / Q000175:diagnosis / Q000209:etiology / Q000628:therapy*; D012074:Remission Induction; D056910:Republic of Korea; D012189:Retrospective Studies; D015607:Stents; D062606:Tertiary Care Centers; D013997:Time Factors; D017211:Treatment Failure
chemical_list: D008670:Metals
keywords: Balloon dilatation; Benign pyloric obstruction; Gastric outlet obstruction scoring system; Self-expandable metallic stent