Diverted MGB: A New Procedure

  • Rui Ribeiro
  • Anabela Guerra
  • Octávio Viveiros


The mini-gastric bypass or one anastomosis gastric bypass (MGB-OAGB) is now growing rapidly in popularity as a safe and effective procedure, with excellent control of weight and co-morbidities in long-term evaluations. Worldwide, it seems to have an important place in the bariatric armamentarium, being better or, at least, as good as the Roux-en-Y gastric bypass (RYGB).

However, there are some significant clinical issues. “Biliary reflux”, “marginal ulcer” or excessive weight loss need better understanding, leading to improved treatment.

We found that by adding a Roux-en-Y diversion to the MGB-OAGB cases which had pathologic post-operative reflux, we were giving patients a very comfortable and effective solution. Thus, in 2013, we decided to do the same in some primary patients who we knew were at risk for gastro-esophageal reflux. We got the same good outcomes.

Diverted mini-gastric bypass (dMGB) is now an established technique in our practice, in about one-third of the patients who receive a gastric bypass. Here we describe the rationale of the concept, the surgical technique and the clinical outcomes of the first 300 patients of our series.


Morbid obesity Gastric bypass Mini-gastric bypass One anastomosis gastric bypass Biliary reflux Hypoglycemia Roux-en-Y diversion 


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Rui Ribeiro
    • 1
  • Anabela Guerra
    • 1
  • Octávio Viveiros
    • 1
  1. 1.Unidade de Tratamento da Obesidade e Doenças Metabólicas in Centro Hospitalar de Lisboa CentralLisboaPortugal

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