How is Adjustable Gastric Banding (LAP-BAND) different from Gastric Bypass (Roux-en-Y)?

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How is Adjustable Gastric Banding (LAP-BAND) different from Gastric Bypass (Roux-en-Y)?

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Laparoscopic Gastric Banding is a purely restrictive procedure. A silicone band is placed around the upper portion of the stomach to produce a small pouch that produces a feeling of fullness and prevents the desire to eat excessively. This procedure limits the amount of food that can be eaten but does not affect the absorption of vitamin and minerals. Roux-en-Y is a combination restrictive and malabsorptive procedure. A small pouch is formed at the upper portion of the stomach as in the LAP-BAND but this pouch is surgically created(permanent) and the remained of the stomach and the first part of the small intestine (duodenum) is bypassed which causes malabsorption (fewer calories are absorbed for several months following the surgery). This combination procedure results in rapid weight loss and requires life long daily replacement of vitamins and minerals to prevent deficiencies.

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