Efficacy of Utilizing Argon Plasma Coagulation for Weight Regain in Roux-en-Y Gastric Bypass Patients: a Multi-center Study

Background Endoscopic approaches exist for targeting weight regain after Roux-en-Y gastric bypass (RYGB), including endoscopic suturing, clipping, and sclerotherapy. Argon plasma coagulation (APC) is a noncontact electrocoagulation method, and when used in RYGB patients, it has shown reduction in the diameter of the gastrojejunal anastomosis. Objectives To study the effectiveness of APC for weight regain in terms of weight loss for RYGB patients, from eight bariatric centers. Methods A retrospective chart review was performed for 558 patients at eight bariatric centers in the USA (1) and Brazil (7) who underwent APC procedure between 31st July 2009 and 29th March 2017. APC was performed on patients who regained weight after RYGB procedure. Results Upon exploratory analysis of the individual BMI data, the mean BMI decreased slightly during the first 24 months and increased slightly afterwards following the APC intervention. The mean weight was 94.5 ± 18.6 kg and the mean BMI was 34.0 kg/m 2 at APC. Where data were available, the mean of lowest weight was 67.0 ± 23.0 kg and the mean of lowest BMI was 24.1 kg/m 2 following gastric bypass. The mean weight loss was 6.5, 7.7, and 8.3 kg at 6, 12, and 24 months, respectively, and the changes in weight over time was statistically significant ( p