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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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Funding

Scitech provided disposable trocars, staplers and cartridges for the procedures performed in the study protocol.

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Authors and Affiliations

  1. Department of Surgery, Faculty of Medical Sciences, State University of Campinas (UNICAMP), São Paulo, Brazil

    Everton Cazzo, Laísa Simakawa Jimenez, Felipe Gilberto Valerini, Tiago Bezerra de Freitas Diniz, Almino Cardoso Ramos & Elinton Adami Chaim

  2. Department of Surgery – UNICAMP; R. Alexander Fleming, s/n, Cidade Universitaria Zeferino Vaz, Campinas, SP, CEP 13085-000, Brazil

    Everton Cazzo

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  1. Everton Cazzo
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  2. Laísa Simakawa Jimenez
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  3. Felipe Gilberto Valerini
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  6. Elinton Adami Chaim
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Correspondence to Everton Cazzo.

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Informed consent was obtained from all individual participants included in the study.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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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 30, 1719–1725 (2020). https://doi.org/10.1007/s11695-020-04393-8

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