One Anastomosis/Mini-Gastric Bypass (OAGB/MGB) as Revisional Surgery Following Primary Restrictive Bariatric Procedures: a Systematic Review and Meta-Analysis

Mohammad Kermansaravi,Shahab Shahabi Shahmiri,Antonio Vitiello,Amir Hossein Davarpanahjazi,Mario Musella,Giovanna Berardi,Rohollah Valizadeh,Miguel Carbajo

doi:10.1007/s11695-020-05079-x

Abstract

One anastomosis gastric bypass (OAGB/MGB) has gained popularity in the past decade. International databases were searched for articles published by September 10, 2020, on OAGB/MGB as a revisional procedure after restrictive procedures. Twenty-six studies examining a total of 1771 patients were included. The mean initial BMI was 45.70 kg/m2, which decreased to 31.52, 31.40, and 30.54 kg/m2 at 1, 3, and 5-year follow-ups, respectively. Remission of type-2 diabetes mellitus (T2DM) following OAGB/MGB at 1-, 3-, and 5-year follow-up was 65.16 ± 24.43, 65.37 ± 36.07, and 78.10 ± 14.19%, respectively. Remission/improvement rate from gastroesophageal reflux disease (GERD). Also, 7.4% of the patients developed de novo GERD following OAGB/MGB. Leakage was the most common major complication. OAGB/MGB appears to be feasible and effective as a revisional procedure after failed restrictive bariatric procedures.

Highlights

In last years, bariatric surgery has proven to be the most effective treatment for morbid obesity and obesity-related
PubMed, Cochrane, and Scopus were consulted for articles published by September 10, 2020, on OAGB/mini-gastric bypass (MGB) as a revisional procedure following restrictive procedures
The definitions provided for weight regain in the studies were different, but 33.3% of the studies relied on body mass index (BMI) ≥ 35 or EWL ≤ 50%

Summary

Methods

A literature search was carried out based on the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) guidelines [15] (see supplementary material). PubMed, Cochrane, and Scopus were consulted for articles published by September 10, 2020, on OAGB/MGB as a revisional procedure following restrictive procedures. The keywords searched were “One anastomosis gastric bypass,” “OAGB,” “Single-anastomosis gastric bypass,” “Weight regain,” “Weight loss,” “Conversion,” “Mini gastric bypass,” “MGB,” “Failure,” “Redo,” “Revisional surgery,” “Conversional surgery,” “omega loop gastric bypass,” or “loop gastric bypass,” “revisional bariatric surgery,” “secondary bariatric surgery,” “revisional sleeve gastrectomy,” “band to bypass,” “revision to bypass,” or a combination of them in the titles or abstracts. The search strategy for can be found in the supplementary files. Two of the authors independently assessed the eligibility of the papers according to the PRISMA guidelines. The references of the articles were manually reviewed for additional relevant papers.

Results

Discussion

Conclusion