Walton Albuquerque

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BACKGROUND Obesity represents a major public health problem in western countries. Initial studies suggest that injection of botulinum A toxin (Btx-A) into the antropyloric region inhibits propulsive contractions of the antral pump, with delay in gastric emptying, early satiety and weight loss. METHODS After approval by the University Ethics Committee, we(More)
We report a patient with a large colonic perforation that occurred in a screening colonoscopy, successfully repaired with endoclips, although the safety and efficacy of this approach is not entirely established. Endoscopic clip placement can be used to treat iatrogenic colonic perforation, when the defect is readily recognized and is easily accessible for(More)
OBJECTIVE To assess the causes of esophageal stricture in pediatric patients and their response to endoscopic dilatation. METHODS Retrospective analysis of clinical and endoscopic data obtained from children and adolescents with esophageal stricture submitted to endoscopic dilatation between July 1993 and January 2003. RESULTS A total of 125 patients(More)
Gastrobronchial fistula (GBF) is a serious complication following bariatric surgery, whose treatment by thoracotomy and/or laparotomy involves a high morbidity rate. We present the outcomes of endoscopic management for GBF as a helpful technique for its healing process. This is a multicenter retrospective study of 15 patients who underwent gastric bypass (n(More)
OBJECTIVES To determine the clinical and laboratory parameters that may predict the presence of esophageal varices in children and adolescents with portal hypertension. PATIENTS AND METHODS Overall, 111 patients with portal hypertension and no previous history of digestive bleeding underwent esophagogastroduodenoscopy for detection of esophageal varices.(More)
BACKGROUND AND AIMS Submucosal injection of a viscoelastic solution prolongs submucosal lift, thus, facilitating endoscopic mucosal resection. Our objective was to assess the safety and clinical effectiveness of 0.4% hydroxypropyl methylcellulose (HPMC) as a submucosal injectant for endoscopic mucosal resection. PATIENTS AND METHODS A prospective,(More)
OBJECTIVE This study aimed to evaluate the feasibility and clinicopathological characteristics of early gastric and esophageal cancers treated with endoscopic submucosal dissection (ESD) at five centers in Brazil. METHODS Five centers in Brazil reported their initial experience with ESD. The cases reported had already been collected by each center before(More)
BACKGROUND AND AIMS Transnasal endoscopy (TNE) has been proposed to screen for esophageal squamous cell cancer (ESCC) in Asia. This study aimed to assess the feasibility and tolerance of Brazilian patients to undergo unsedated TNE for screening, the prevalence of ESCC in this population, and the effectiveness of white-light endoscopy (WLE) and digital(More)