Mini Gastric Bypass

One Anastomosis Gastric Bypass

OAGB Illustration

The one anastomosis gastric bypass (OAGB), also known as the ‘mini’ gastric bypass, Omega loop bypass or single-loop gastric bypass, is gaining popularity worldwide. It was first described in 1997 as a variation of the Roux-en-Y Gastric Bypass (RYGB) to improve its outcomes. Recent long-term publications detailing excellent results, with minimal complications, have strengthened this view.

The OAGB is performed via laparoscopic, or ‘keyhole’ surgery. Similar to the RYGB the stomach is divided to create a new small stomach pouch. The small intestine is then joined (anastomosed) to the new pouch – with food bypassing the majority of the stomach as well as up to 200cm of small bowel. No stomach is removed, and thus the procedure can be revised or reversed.

The advantage of the OAGB is that there is only one anastomosis. This decreases the risk of developing an internal hernia, a potential complication of the RYGB, which has two anastomoses. In addition, the anastomosis between the stomach and small bowel is larger – thus enabling food to enter the small bowel easily. The larger join enables ‘less restrictive’ eating habits. However due to the strong metabolic effects average weight loss following the surgery is just an impressive as the RYGB. Following a OAGB there is a slightly higher risk of developing post-operative vitamin and micronutrient deficiency – making post-operative multivitamin compliance and follow up especially important.

Our team approach includes dietitian and psychological support to help you achieve your weight loss goals. Please contact us if you would like to make an appointment to discuss your weight loss surgical options with me.

Professional Associations
fracs logo
Anzgosa Logo
The University of Queensland Logo
ama queensland logo
anzmoss logo
ifso logo

Get In Touch