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A single protocol is not superior to the other. In one 2019 systematic review, estimated weight loss (EWL) for each surgical protocol is as follows: 56.7% for gastric bypass, 45.9% for gastric banding, 74.1% for biliopancreatic bypass +/- duodenal switch and 58.3% for sleeve gastrectomy. [28]
Long-term after care programs have demonstrated benefit for sustained weight loss after ESG, with one study showing that patients who continued after care visits following ESG had 20.5% total body weight loss compared to 16.9% total body weight loss in those who dropped out of long-term follow up programs. [29]
The gastric bypass reduces the size of the stomach by well over 90%. [4] A normal stomach can stretch, sometimes to over 1000 mL, while the pouch of the gastric bypass may be 15 mL in size. The gastric bypass pouch is usually formed from the part of the stomach that is least susceptible to stretching.
Sleeve gastrectomy or vertical sleeve gastrectomy, is a surgical weight-loss procedure, typically performed laparoscopically, in which approximately 75 - 85% of the stomach is removed, [1] [2] along the greater curvature, [3] which leaves a cylindrical, or "sleeve"-shaped stomach the size of a banana.
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About 30% of those who undergo VBG achieve normal weight, and about 80% achieve some degree of weight loss. Most studies have suggested that 10 years after surgery, only 10% of patients maintain a minimum weight loss of at least 50% of their total excess weight at the time of their initial surgery. Some patients regain weight.
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