title: Blood bezoar causing obstruction after laparoscopic Roux-en-Y gastric bypass.
abstract: BACKGROUND
  Bowel obstruction is a known complication after bariatric surgery especially Roux-en-Y gastric bypass. The known etiologies include internal hernia, jejunojejunostomy stricture, ileus, intussusceptions, superior mesenteric artery syndrome, incarcerated port site hernia, and adhesions. Blood bezoar is a rare cause of small intestinal obstruction after Roux-en-Y gastric bypass.
  
  
  METHODS
  We are going to present two cases of small bowel obstruction after Roux-en-Y gastric bypass due to blood bezoar.
  
  
  CONCLUSIONS
  Blood clot as the etiology of small bowel obstruction after Roux-en-Y gastric bypass is an unusual event. In the presence of postoperative small intestinal obstruction an obstructive blood bezoar should be in differential diagnosis. As any other etiology of postoperative obstruction it should be treated immediately to prevent its adverse lethal complications.
  
  
  CONCLUSIONS
  The best way for prevention of blood bezoar is prevention of bleeding at staple line and doing hemostasis at stapler line.
authors.affiliation: Minimally Invasive Surgery Research Center, Rasoul-e-Akram Hospital, Iran University of Medical Sciences, Tehran, Iran. Electronic address: apazouki@yahoo.com.
authors.forename: Abdolreza
authors.initials: A
authors.lastname: Pazouki
authors.affiliation: Minimally Invasive Surgery Research Center, Rasoul-e-Akram Hospital, Iran University of Medical Sciences, Tehran, Iran. Electronic address: Pakaneh@gmail.com.
authors.forename: Mohamadali
authors.initials: M
authors.lastname: Pakaneh
authors.affiliation: Minimally Invasive Surgery Research Center, Rasoul-e-Akram Hospital, Iran University of Medical Sciences, Tehran, Iran; Shahed University, Faculty of Medicine, Mostafa-Khomeini Hospital, Tehran, Iran. Electronic address: arkhalaj@yahoo.com.
authors.forename: Alireza
authors.initials: A
authors.lastname: Khalaj
authors.affiliation: Minimally Invasive Surgery Research Center, Rasoul-e-Akram Hospital, Iran University of Medical Sciences, Tehran, Iran. Electronic address: zeinab_tamannaie@yahoo.com.
authors.forename: Zeinab
authors.initials: Z
authors.lastname: Tamannaie
authors.affiliation: Surgical Oncology Research Center, Imam Reza Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address: jangjooa@mums.ac.ir.
authors.forename: Ali
authors.initials: A
authors.lastname: Jangjoo
authors.affiliation: Minimally Invasive Surgery Research Center, Rasoul-e-Akram Hospital, Iran University of Medical Sciences, Tehran, Iran. Electronic address: parvinshapoori@yahoo.com.
authors.forename: Parvin
authors.initials: P
authors.lastname: Shapoori
authors.affiliation: Minimally Invasive Surgery Research Center, Rasoul-e-Akram Hospital, Iran University of Medical Sciences, Tehran, Iran. Electronic address: kalhormohsen@yahoo.com.
authors.forename: Mohsen
authors.initials: M
authors.lastname: Kalhor
keywords: Bezoar; Bowel obstruction; Roux-en-Y gastric bypass