In this procedure, a band made of special material is placed around the stomach near its upper end, creating a small pouch and a narrow passage into the larger remainder of the stomach. This technique leaves the digestive tract in normal sequence for digestion and absorption. The surgical effect is a reduction in capacity for a meal. The success of this operation is the small pouch volume and correct outlet diameter. In this procedure the band can be adjusted to increase or decrease restriction, surgery can be reversed, and digestion and absorption remain normal.
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