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Updated: Feb 15, 2026

One-anastomosis Gastric Bypass OAGB in Rats
Published on: November 10, 2018
MINI-GASTRIC BYPASS: DESCRIPTION OF THE TECHNIQUE AND PRELIMINARY RESULTS
Elinton Adami Chaim1, Almino Cardoso Ramos2, Everton Cazzo1
1Department of Surgery, Faculty of Medical Sciences, State University of Campinas - UNICAMP, Campinas.
Background:
In recent years, a surgical technique known as single-anastomosis gastric bypass or mini-gastric bypass has been developed. Its frequency of performance has increased considerably in the current decade.
Aim:
To describe the mini-gastric bypass technique, its implementation and preliminary results in a university hospital.
Methods:
This is an ongoing prospective trial to evaluate the long-term effects of mini-gastric bypass. The main features of the operation were: a gastric pouch with about 15-18 cm (50-150 ml) with a gastroenteric anastomosis in the pre-colic isoperistaltic loop 200 cm from the duodenojejunal angle (biliopancreatic loop).
Results:
Seventeen individuals have undergone surgery. No procedure needed to be converted to open approach. The overall 30-day morbidity was 5.9% (one individual had intestinal obstruction caused by adhesions). There was no mortality.
Conclusion:
Mini-gastric bypass is a feasible and safe bariatric surgical procedure.
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