Abstract
Introduction: Obesity is a serious chronic non-communicable disease (NCD) that has several consequences for public health. In this scenario, there are more than 2.2 billion people who are overweight or obese in the world, and the latest census showed that Brazil is in fifth place in the world ranking with 18.0 million obese individuals, tending to reach 70.0 million patients. Roux-en-Y Gastric Bypass (RYGB) is one of the most performed surgeries in the world, however, approximately 20% of patients undergoing this surgery do not lose the desired weight in the first year and 15% of patients regain weight after 18 to 24 months. Anastomotic diameters above 15.0 mm have been associated with a recurrence of obesity and may be associated with complaints of decreased satiety. Thus, the application of argon plasma in gastrojejunal anastomosis has been proposed to reduce weight in patients undergoing RYGB who presented recurrent obesity. Objective: It was to develop current scientific approaches through a systematic review of the main approaches and application of argon plasma and dietary monitoring in the reduction of dilated gastrojejunal anastomosis and the consequent reduction of recurrent weight after gastric bypass. Methods: The research and development of the work were carried out from May to July 2024 in the Scopus, PubMed, Science Direct, and Scielo databases, using the main scientific articles on nutrigenomics, and following the PRISMA rules. The quality of the studies was based on the GRADE and AMSTAR-2 instruments, and the risk of bias by the Cochrane instrument (Funnel Plot). Results and Conclusion: Twentyone studies were included out of a total of 125. According to the GRADE instrument, most studies presented homogeneity in their results, with X2=88.6%>50%. Considering the Cochrane tool for risk of bias, the overall assessment resulted in 37 studies with a high risk of bias and 25 studies that did not meet the GRADE and AMSTAR-2 criteria. The application of argon plasma in the treatment of dilated gastrojejunal anastomosis and dietary monitoring have been highlighted as effective and safe methods in the treatment of recurrent obesity. The application of argon plasma via an endoscopic approach is very effective in its indications, technically easy to perform, and has numerous advantages over conventional electrocoagulation. Complications are rare. The limit of tissue penetration depth of 2 to 3 mm associated with excellent coagulation allows its application in critical areas such as the duodenum and colon.