title: [Stenosis and ulceration after bariatric surgery].
abstract: BACKGROUND
  The increasing number of morbidly obese patients leads to a rising number of bariatric procedures in Germany. The operative techniques are highly standardized but such a standardization is lacking for the management of postoperative complications such as stenosis and ulceration after Roux-en-Y gastric bypass (RYGB) surgery and sleeve gastrectomy (SG).
  
  
  METHODS
  The current literature is reviewed and a complication management is developed and presented in this article.
  
  
  CONCLUSIONS
  Postoperative stenoses occure with a frequency of 0.1-3.9% after SG and 3-27% after RYGB. Stenosis is secondary to inadequate surgical technique or microinsufficiency. Ulcers can be due to reaction to foreign body, local ischemia, peptic lesion, fistula and microinsufficiency.
  
  
  CONCLUSIONS
  Endoscopic interventions are successful in most cases for stenosis after RYGB and for short stenoses after SG. After SG long stenoses require redo surgery and conversion to RYGB. Ulcers can be managed by medication with the exception of perforation and hemorrhage, which require emergency laparoscopy.
authors: Klinik für Allgemein- und Viszeralchirurgie, Schwarzwald-Baar Klinikum VS GmbH, Klinikstr.1, 78052, Villingen-Schwenningen, Deutschland, Silke.Mueller@sbk-vs.de.
authors: S
authors: S
authors: Müller
authors: N
authors: N
authors: Runkel
mesh_terms: D000713:Anastomosis, Roux-en-Y / Q000009:adverse effects*; D015390:Gastric Bypass / Q000009:adverse effects*; D005767:Gastrointestinal Diseases / Q000209:etiology / Q000601:surgery*; D006801:Humans; D007415:Intestinal Obstruction / Q000209:etiology / Q000601:surgery*; D011183:Postoperative Complications / Q000209:etiology / Q000601:surgery*; D012086:Reoperation; D012307:Risk Factors; D014456:Ulcer / Q000209:etiology / Q000601:surgery*