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Gastric bypass operations, Roux-en-Y
gastric bypass, and the extensive gastric bypass (biliopancreatic
diversion, with duodenal switch), create a small pouch by stapling
or removal of portions of the stomach, and also bypass the duodenum
and other segments of the small intestines thus producing some extent
of malabsorption. These procedures have an operative risk, 1 percent
to 2.5 percent death rate, but require lifelong medical follow-up
and monitoring to avoid and manage possible complications. Although
bariatric surgery has made major advancements in the last 30 years,
the effect on the human body of the weight loss produced requires
investigation.
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