A One Anastomosis Gastric Bypass (OAGB) or ‘Mini Gastric Bypass’ is a laparoscopic weight loss procedure.
The Mini Gastric Bypass / One Anastomosis Gastric Bypass involves creating a long, narrow stomach pouch and connecting it directly to the middle segment (Jejunum) of the small intestine. The bypassed portion of the stomach and first segment of the small intestine (Duodenum, approximately 150cm to 200cm) remain in the body so that it can continue to produce digestive juices.
By connecting the new stomach pouch directly to the small intestine allows food to bypass a portion of the small intestine where the majority of our vitamins and minerals are absorbed.
Due to the changes in the anatomy of the digestive system that occur during the One Anastomosis Gastric Bypass, hormone signalling becomes altered, which includes Ghrelin and Leptin. Ghrelin signals to your brain when you’re hungry, whereas Leptin signals to your brain when you’re full/ satisfied i.e. you stop eating).
Alterations in these hormones affect your hunger and feelings of fullness, which influence how your body processes and stores calories. This, in turn, improves metabolic health, lowers your metabolic set point and supports effective weight management.
The restriction (smaller stomach) and malabsorption (bypass component) works in conjunction with these hormonal changes which play a significant role in weight loss from the One Anastomosis Gastric Bypass.
There are multiple layers to weight loss and it’s important to have a strong support system around you. As well as the physical benefits of weight loss and health improvement, it is equally important that the psychological and emotional aspect of a patient’s journey are supported and monitored.
Dr Scott Whiting applies a multi-disciplinary approach with his patients, ensuring that they are well supported throughout their journey. Balance and sustainability are paramount when it comes to weight loss, therefore ensuring long-term and sustainable results.
Selecting the right procedure for the right patient is crucial and this will depend on many factors such as an individual’s health, lifestyle and health goals. Having a thorough discussion with your surgeon and bariatric team will help determine which procedure may be best for you.
#Actual risks will depend on individual circumstances and should be discussed with Dr Whiting.
* Backman B, et al. The Bariatric Surgery Registry Annual Report, 2020. Monash University, Department of Epidemiology and Preventive Medicine. August 2020, Report 8.
Australian Bureau of Statistics. National Health Survey: First results. 2017-2018 Financial year. Available here.
# Lee PC, Dixon J. Aust Fam Physician. 2017;46(7):465-471.
Monash University Bariatric Surgery Registry. Bariatric Surgery Registry 2018/19 Report. June 2019. Available here.
Pareek M, et al. J Am Coll Cardiol. 2018;71(6):670-687
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Are you considering weightloss surgery?
If your BMI is between 30-35 without obesity-related health conditions, Dr Whiting will carefully determine your eligibility for surgical weight-loss interventions.
