title: Use of a specially designed partially covered self-expandable metal stent (PSEMS) with a 40-mm diameter for the treatment of upper gastrointestinal suture or staple line leaks in 11 cases.
abstract: BACKGROUND
  The use of self-expandable stents to treat postoperative leaks and fistula in the upper gastrointestinal (GI) tract is an established treatment for leaks of the upper GI tract. However, lumen-to-stent size discrepancies (i.e., after sleeve gastrectomy or esophageal resection) may lead to insufficient sealing of the leaks requiring further surgical intervention. This is mainly due to the relatively small diameter (≤30 mm) of commonly used commercial stents. To overcome this problem, we developed a novel partially covered stent with a shaft diameter of 36 mm and a flare diameter of 40 mm.
  
  
  METHODS
  From September 2008 to September 2010, 11 consecutive patients with postoperative leaks were treated with the novel large diameter stent (gastrectomy, n = 5; sleeve gastrectomy, n = 2; fundoplication after esophageal perforation, n = 2; Roux-en-Y gastric bypass, n = 1; esophageal resection, n = 1). Treatment with commercially available stents (shaft/flare: 23/28 mm and 24/30 mm) had been unsuccessful in three patients before treatment with the large diameter stent. Due to dislocation, the large diameter stent was anchored in four patients (2× intraoperatively with transmural sutures, 2× endoscopically with transnasally externalized threads).
  
  
  RESULTS
  Treatment was successful in 11 of 11 patients. Stent placement and removal was easy and safe. The median residence time of the stent was 24 (range, 18-41) days. Stent dislocation occurred in four cases (36 %). It was treated by anchoring the stent. Mean follow-up was 25 (range, 14-40) months. No severe complication occurred during or after intervention and no patient was dysphagic.
  
  
  CONCLUSIONS
  Using the novel large diameter, partially covered stent to seal leaks in the upper GI tract is safe and effective. The large diameter of the stent does not seem to injure the wall of the upper GI tract. However, stent dislocation sometimes requires anchoring of the stent with sutures or transnasally externalized threads.
authors.affiliation: Department of General and Visceral Surgery, Universitätsklinikum Freiburg, Hugstetterstr. 55, 79106 Freiburg, Germany. andreas.fischer@uniklinik-freiburg.de
authors.forename: Andreas
authors.initials: A
authors.lastname: Fischer
authors.forename: Dirk
authors.initials: D
authors.lastname: Bausch
authors.forename: Hans-Juergen
authors.initials: HJ
authors.lastname: Richter-Schrag
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D057868:Anastomotic Leak / Q000601:surgery*; D016629:Esophagectomy; D005260:Female; D005743:Gastrectomy; D006801:Humans; D008297:Male; D008670:Metals; D008875:Middle Aged; D011474:Prosthesis Design; D012189:Retrospective Studies; D015607:Stents; D017792:Surgical Stapling; D013536:Suture Techniques
chemical_list: D008670:Metals