title: [Usefulness of upper gastrointestinal series to detect leaks in the early postoperative period of bariatric surgery].
abstract: BACKGROUND
  Postoperative leaks are the most undesirable complication of bariatric surgery and upper gastrointestinal (GI) series are routinely ordered to rule them out. Despite the published literature recommending against its routine use, it is still being customarily used in Chile.
  
  
  OBJECTIVE
  To examine the usefulness of routine upper GI series using water-soluble iodinated contrast media for the detection of early postoperative leaks in patients undergoing bariatric surgery.
  
  
  METHODS
  A cohort of 328 patients subjected to bariatric surgery was followed from October 2012 to October 2013. Most of them underwent sleeve gastrectomy.
  
  
  RESULTS
  Upper GI series on the first postoperative day were ordered to 308 (94%) patients. Postoperative leaks were observed in two patients, with an incidence of 0.6%. The sensitivity for upper GI series detection of leak was 0% and the negative predictive value was 99%.
  
  
  CONCLUSIONS
  Routine upper GI series after bariatric surgery is not useful for the diagnosis of postoperative leak, given the low incidence of this complication and the low sensitivity of the technique.
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Medina
authors.forename: Andrés
authors.initials: A
authors.lastname: Miranda-Merchak
authors.forename: Alonso
authors.initials: A
authors.lastname: Martínez
authors.forename: Felipe
authors.initials: F
authors.lastname: Sánchez
authors.forename: Sebastián
authors.initials: S
authors.lastname: Bravo
authors.forename: Juan Eduardo
authors.initials: JE
authors.lastname: Contreras
authors.forename: Isabel
authors.initials: I
authors.lastname: Alliende
authors.forename: Andrea
authors.initials: A
authors.lastname: Canals
mesh_terms: D000328:Adult; D057868:Anastomotic Leak / Q000000981:diagnostic imaging* / Q000209:etiology; D050110:Bariatric Surgery / Q000009:adverse effects*; D003287:Contrast Media; D005260:Female; D005743:Gastrectomy / Q000009:adverse effects; D006801:Humans; D010535:Laparoscopy / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000601:surgery; D011184:Postoperative Period; D011446:Prospective Studies; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods; D041742:Upper Gastrointestinal Tract / Q000000981:diagnostic imaging*
chemical_list: D003287:Contrast Media