title: Vertical gastrectomy and gastric bypass in Roux-en-Y induce postoperative gastroesophageal reflux disease?
abstract: BACKGROUND
  The association between obesity and gastroesophageal reflux disease has a high incidence and may be present in half of obese patients with surgical indication. Bariatric operations can also induce reflux alone - differently from BMI factors - and its mechanisms are dependent on the type of procedure performed.
  
  
  OBJECTIVE
  To perform a literature review comparing the two procedures currently most used for surgical treatment of obesity and analyze their relationship with the advent of pre-existing reflux disease or its appearance only in postoperative period.
  
  
  METHODS
  The literature was reviewed in virtual database Medline/PubMed, SciELO, Lilacs, Embase and Cochrane crossing the following MeSH descriptors: gastric bypass AND / OR anastomosis, Roux-en-Y AND / OR gastroesophageal reflux AND / OR gastroenterostomy AND / OR gastrectomy AND / OR obesity AND / OR bariatric surgery AND / OR postoperative period. A total of 135 relevant references were considered but only 30 were used in this article. Also was added the experience of the authors of this article in handling these techniques on this field.
  
  
  CONCLUSIONS
  The structural changes caused by surgical technique in vertical gastrectomy shows greater commitment of antireflux mechanisms predisposing the induction of GERD postoperatively compared to the surgical technique performed in the gastrointestinal Bypass Roux-en-Y.
authors.affiliation: Medical Research Institute, University Evangelic Hospital of Curitiba, Evangelic Faculty of Paraná, Curitiba, PR, Brazil.
authors.forename: Paulo Afonso Nunes
authors.initials: PA
authors.lastname: Nassif
authors.affiliation: Medical Research Institute, University Evangelic Hospital of Curitiba, Evangelic Faculty of Paraná, Curitiba, PR, Brazil.
authors.forename: Osvaldo
authors.initials: O
authors.lastname: Malafaia
authors.affiliation: Medical Research Institute, University Evangelic Hospital of Curitiba, Evangelic Faculty of Paraná, Curitiba, PR, Brazil.
authors.forename: Jurandir Marcondes
authors.initials: JM
authors.lastname: Ribas-Filho
authors.affiliation: Medical Research Institute, University Evangelic Hospital of Curitiba, Evangelic Faculty of Paraná, Curitiba, PR, Brazil.
authors.forename: Nicolau Gregori
authors.initials: NG
authors.lastname: Czeczko
authors.affiliation: Medical Research Institute, University Evangelic Hospital of Curitiba, Evangelic Faculty of Paraná, Curitiba, PR, Brazil.
authors.forename: Rodrigo Ferreira
authors.initials: RF
authors.lastname: Garcia
authors.affiliation: Medical Research Institute, University Evangelic Hospital of Curitiba, Evangelic Faculty of Paraná, Curitiba, PR, Brazil.
authors.forename: Bruno Luiz
authors.initials: BL
authors.lastname: Ariede
mesh_terms: D005743:Gastrectomy / Q000009:adverse effects* / Q000379:methods*; D015390:Gastric Bypass / Q000009:adverse effects*; D005764:Gastroesophageal Reflux / Q000209:etiology*; D006801:Humans; D009765:Obesity / Q000601:surgery*