Bile reflux and marginal ulcers after one-anastomosis gastric bypass (OAGB). A narrative review

One-anastomosis gastric bypass has now become the third most commonly performed bariatric technique worldwide. However, as a consequence of the configuration of this surgery, it can present some chronic complications (anastomotic mouth ulcers and biliary reflux) that physicians must come to better understand and assess. In this narrative review, we aimed to update our knowledge of both the diagnosis and treatment of these two complications in the context of bariatric surgeries. We concluded that a series of pre-, intra-, and postoperative preventive strategies should be considered by surgeons to help reduce the appearance of these complications. El bypass de una sola anastomosis se ha convertido, a-ctualmente, en la tercera técnica bariátrica más realizada a nivel mundial. Sin embargo, como consecuencia de su conformación, presenta una serie de complicaciones crónicas (úlcera de boca anastomótica y reflujo biliar) que debemos conocer y valorar. Con esta revisión narrativa, se pretende realizar una puesta al día, tanto en el diagnóstico como en el tratamiento de cada una de ellas. Hay una serie de estrategias preventivas pre, intra y postoperatorias que deben tenerse en cuenta para disminuir, en lo posible, su aparición.