Banded One Anastomosis Gastric Bypass versus Non-Banded One Anastomosis Gastric Bypass: A 3-year Prospective Cohort Study.

Abstract

Background: The impact of band use in one anastomosis gastric bypass (OAGB) is uncertain. Limited evidenceis available on how this approach enhance weight loss.Patients and methods: Prospective cohort study was conducted to compare effectiveness of B_OAGB and OAGBregarding weight loss and resolution of Obesity related medical conditions. Patients were followed from December2020 to June 2024. Eighty-seven patients were enrolled. 43 patients for B_OAGB and 44 patients for OAGB wereanalyzed, with a 3-year follow-up at the Ain Shams University Bariatric surgery department.Results: The two groups’ baseline characteristics were similar. There was a significant difference between bothgroups in operative time, B_OAGB took longer time (80.09 ± 10.18) minutes compared to OAGB (70.09 ± 10.52)minutes, p value ≤ 0.001. Between the two groups, there was no statistically significant difference in morbidity,death, or the resolution of Obesity related medical conditions. There was a significant difference in BMI betweenB_OAGB with and OAGB at 12, 24, and 36 months, B_OAGB showed lower BMI, p values were 0.001, 0.001 and≤0.001 respectively.Conclusion: Patients who received B_OAGB surgery lost more weight three years after surgery than those whodid not have band. These findings imply that B_OAGB with a silicon ring was successful in sustaining weight lossand resolution of comorbidities over short to medium period with accepted rate of complications.