Extensive Gastric Bypass: Which is also known as bilopancreatic diversion, is a more complex procedure that will remove stomach portions and attach them directly to the patient's small intestine.
Roux-en-Y: Is a more common procedure that creates a small pouch for food storage through the stapling of most of the stomach. Meals will then bypass the section of the intestines which would absorb nutrients, under normal conditions. There can also be a band added to the pouch's bottom for restriction purposes. This will slow the pouch's emptying and this is called a Vertical Banded Gastroplasty.
Taking the patient's size into consideration, the Roux-en-Y will be performed through either a small incision utilizing laparoscopic techniques or through an open surgery procedure that uses a larger incision.
Banding or stapling part of the stomach will create the pouch. This limits the patient's food intake. A Y-shaped small intestine section is then attached so that the pouch will allow even more food to bypass the area of the intestine designed to absorb calories and nutrients.
In the extensive gastric bypass, a section of the stomach is removed which creates the food pouch. Although this will lead to rapid loss of weight, the technique can also lead to nutritional problems - so it is not as commonly used.
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