title: Comparison of electrical current and ultrasonic device for incision of the septum of the pharyngoesophageal diverticulum in a pig model.
abstract: BACKGROUND
  Complications of endoscopic treatment of pharyngoesophageal diverticulum (PED) such as bleeding and perforation occur in up to 15 % of cases. Our objective was to compare incision of the PED septum using the ultrasonic device (group H) with incision using electrical current (group M) in a pig model.
  
  
  METHODS
  Twenty domestic pigs were divided into groups H and M. The incision of the PED septum was performed using the ultrasonic device or using electrical current, respectively. The procedural time, complication rate, length of the border of the incised septum, and thermal tissue damage were compared between groups.
  
  
  RESULTS
  Mean time to divide the septum and total procedure time were significantly shorter in group H. Mean length of the border of the incised septum was significantly higher in group H. The lateral thermal spread caused by electrical current (group M) was more intense. Hemorrhage was exclusively observed in group M.
  
  
  CONCLUSIONS
  Experimental endoscopic diverticulotomy using ultrasonic device was faster and caused less tissue damage when compared to electrical current.
authors: Gastrointestinal Endoscopy Unit, Department of Gastroenterology, Medical School of University of São Paulo, São Paulo, Brazil.
authors: Fábio Yuji
authors: FY
authors: Hondo
authors: Gastrointestinal Endoscopy Unit, Department of Gastroenterology, Medical School of University of São Paulo, São Paulo, Brazil.
authors: José Humberto
authors: JH
authors: Giordano-Nappi
authors: Gastrointestinal Endoscopy Unit, Department of Gastroenterology, Medical School of University of São Paulo, São Paulo, Brazil.
authors: Fernanda Cristina Simões
authors: FC
authors: Pessorrusso
authors: Gastrointestinal Endoscopy Unit, Department of Gastroenterology, Medical School of University of São Paulo, São Paulo, Brazil. mcavalcantefranco@gmail.com.
authors: Matheus Cavalcante
authors: MC
authors: Franco
authors: Gastrointestinal Endoscopy Unit, Department of Gastroenterology, Medical School of University of São Paulo, São Paulo, Brazil.
authors: Carla Zanelatto
authors: CZ
authors: Neves
authors: Gastrointestinal Surgery Division, Department of Gastroenterology, Medical School of University of São Paulo, Av. Dr. Enéas de Carvalho Aguiar, São Paulo, SP, 05403-000, Brazil.
authors: Ivan
authors: I
authors: Cecconello
authors: Gastrointestinal Endoscopy Unit, Department of Gastroenterology, Medical School of University of São Paulo, São Paulo, Brazil.
authors: Paulo
authors: P
authors: Sakai
authors: Gastrointestinal Surgery Division, Department of Gastroenterology, Medical School of University of São Paulo, Av. Dr. Enéas de Carvalho Aguiar, São Paulo, SP, 05403-000, Brazil. fauze.maluf@terra.com.br.
authors: Fauze
authors: F
authors: Maluf-Filho
mesh_terms: D000818:Animals; D004598:Electrosurgery / Q000295:instrumentation*; D020701:Esophagoscopes; D004945:Esophagoscopy / Q000295:instrumentation / Q000379:methods; D005260:Female; D034421:Sus scrofa; D059708:Ultrasonic Surgical Procedures / Q000295:instrumentation*; D016672:Zenker Diverticulum / Q000601:surgery*
keywords: Diverticulum; Endoscopic surgical procedure; Esophageal; Natural orifice endoscopic surgery; Zenker’s diverticulum