Laparoscopic One Anastomosis Gastric Bypass as a Revisional Procedure After Failed Vertical Banded Gastroplasty: Our Center Experience

<b>Background:</b> Vertical banded gastroplasty (VBG) was historically a popular restrictive bariatric procedure, but long-term failure rates due to weight regain, stenosis, and gastroesophageal reflux have necessitated revisional interventions. One anastomosis gastric bypass (OAGB), also known as mini-gastric bypass, has emerged as a viable revisional option due to its technical simplicity, lower complication rates, and promising metabolic outcomes. This study evaluates the safety, efficacy, and outcomes of OAGB as a revisional procedure following failed VBG, based on our center's experience and a review of the current literature. <b>Methods:</b> Seventy-one patients who underwent revisional OAGB after failed open VBG between February 2014 and February 2020 were included in this retrospective study. Three years outcomes regarding weight loss (the percentage of excess body weight loss (EBWL %) and change in body mass index (BMI)), co-morbidities resolution, morbidity, and mortality were assessed. <b>Results:</b> The EBWL % after revisional OAGB was 68.2 ± 9.4%, 65.9 ± 2.5%, and 59.6 ± 7.4% after 1, 2, and 3 years, respectively. The mean BMI before revisional surgery was 41.8 ± 3.7 kg/m²,which decreased to 31.9 ± 4.2 kg/m² 3 years after the revisional surgery. After 1 year, there was a remarkable resolution of obesity-related co-morbidities, the remission of type 2 diabetes mellitus was 85.7%, and of hypertension was 80%. Remission of other comorbidities was also observed. Bile reflux was encountered in 6 cases (8.5%), two of them required surgical intervention. <b>Conclusions:</b> OAGB is a feasible and effective revisional procedure after failed open VBG. However, the risk of bile reflux should be considered to justify these findings; further prospective randomized controlled trials are required.