The Mini-Gastric Bypass or single anastomosis gastric bypass, is an effective and well-established procedure which combines some of the properties of a gastric sleeve and a standard gastric bypass. The upper part of the stomach is divided into a tube, similar to the top three-quarters of a sleeve, and then joined to a loop of intestine.
The mini-gastric bypass can be used as a primary weight loss procedure. It can also be used in patients who have had previous gastric banding or sleeve surgery but have been unsuccessful with weight loss, or who have had band-related complications and have decided on revision surgery.
It is not ideally suited to patients with symptoms of reflux disease (severe heartburn that needs medication).
In this operation, the top of the stomach is stapled to form a thin tube (30ml to 50ml in size). The thin tube becomes the new, smaller stomach and is completely separate to the rest of the stomach. This stomach is then sewn to a loop of the small intestine, bypassing the first part of the intestine called the duodenum and approximately 150–200cm of the bowel. The rest of the stomach and upper part of the small intestine remains in the body but is no longer used for food digestion.
The mini bypass procedure helps you to lose weight in different ways:
- By reducing the feeling of hunger through altered gut to brain signaling
- By enabling an earlier feeling of satiety and fullness when eating a meal resulting in a healthy portion size
- By decreasing the amount of calories you absorb from your food as a result of
bypassing 150 to 200cm of the upper part of the small intestine