Ring-Augmented versus Non-Ring-Augmented One-Anastomosis Gastric Bypass as Revisional Surgery after Sleeve Gastrectomy: a Comparative Cohort Study
Ahmed Elmasry·Mohamed H. Zidan·Mahmoud F. Abdelaziz·Amr Abdelatyy·Mohamed Abdelgawad·Muhammad S. Sahali·Eslam E. Mohamed·Hashem Altabbaa·Ahmed El Shamarka·Mohamed Alaa Sallam
Abstract Background Sleeve gastrectomy (SG) is the most frequently performed metabolic and bariatric surgery (MBS) worldwide, but long-term suboptimal weight loss (SOWL) or recurrent weight gain (RWG) affects up to one third of patients and often necessitates revisional procedures. One-anastomosis gastric bypass (OAGB) is an effective revision, yet pouch dilation and late RWG remain concerns. Ring augmentation (RA) has been proposed to enhance restriction and sustain weight loss, but evidence in