MGB is very successful (50-70% excess weight loss) as a primary weight loss procedure, especially in type II DM. It can be used on patients who have failed previous restrictive procedures, sweet eaters, and patients with heartburn. It has a lower complication rate than RNYGB, and is also completely reversible. In addition, it can also be converted to a RNYGB or a VSG at a later stage if required.
The mini gastric bypass is also a restrictive and malabsorptive procedure that reduces food intake and reduces the absorption of nutrients from the food. Absorption of nutrients is limited because part of the intestines is bypassed and not used.
A stomach sleeve is created and separated from the rest of the stomach which is retained in the body (like the RNYGB). The volume of the stomach sleeve after MGB is between 70-90 ml. The small intestine is anastomosed in continuity without disconnecting it (unlike in RNYGB) to the newly created stomach sleeve.
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