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Weight Loss and Vomiting 1 Year After Banded Versus Non-banded One Anastomosis Gastric Bypass: a Prospective Randomized Trial

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Abstract

Background

The weight loss outcomes after banded one-anastomosis gastric bypass (OAGB) remain to be determined.

Objective

To compare weight loss and vomiting 1 year after banded versus non-banded OAGB.

Methods

This is a prospective, open-label, randomized study, which evaluated 33 individuals with morbid obesity, which underwent banded (16 individuals) and non-banded OAGB (17 individuals) and were followed up for 12 months. Weight loss (percentages of total weight loss—%TWL—and excess weight loss—%EWL) and occurrence of vomiting were assessed and compared before surgery and after 6 and 12 months.

Results

At baseline, there were no differences between groups in regard to age, gender, and body mass index (BMI). At 6 and 12 months post-op, and the overall mean %TWL regardless of band use was 22.4 ± 7% and 29 ± 6.9%, respectively, and the overall average %EWL regardless of band use was 66.8 ± 22.9% and 86.3 ± 24%, respectively. %TWL did not differ between the banded and non-banded groups at 6 (21.8 ± 6.8% vs. 23.1 ± 7.4%; p = 0.7) and 12 months post-op (27.5 ± 6.6% vs. 30.4 ± 7.1%; p = 0.3), as well as %EWL at 6 (67 ± 22.9% vs. 67.6 ± 23.6%; p = 0.6) and 12 months post-op (83.5 ± 24.4% vs. 89 ± 24.1%; p = 0.4). The occurrence of vomiting did not significantly differ between banded and non-banded OAGB at 6 (12.5% vs. 11.8%; p = 0.9) and 12 months post-op (12.5% vs. 5.9%; p = 0.5).

Conclusion

OAGB led to an overall satisfactory weight loss after 1 year, regardless of band use. Banded OAGB did not lead to neither significantly higher weight loss nor more vomiting than non-banded OAGB 1 year after surgery.

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Correspondence to Everton Cazzo.

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Cazzo, E., Jimenez, L.S., Valerini, F.G. et al. Weight Loss and Vomiting 1 Year After Banded Versus Non-banded One Anastomosis Gastric Bypass: a Prospective Randomized Trial. OBES SURG (2020). https://doi.org/10.1007/s11695-020-04393-8

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Keywords

  • Bariatric surgery
  • Gastric bypass
  • Weight loss
  • Obesity
  • Vomiting