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Laparoscopic Sleeve Gastrectomy
Laparoscopic Sleeve gastrectomy (LSG) is gradually becoming the new gold standard for Bariatric surgery. It is the restrictive part of the more extensive mixed restrictive and malabsorptive operation, gastric bypass and duodenal switch (GB/DS). It generates weight loss by restricting the amount of food that can be eaten without any bypass of the intestines or malabsorption. With this procedure, the surgeon removes approximately 85 percent of the stomach laparoscopically so that the stomach takes the shape of a tube or "sleeve."
Because the modified stomach continues to function normally there are fewer restrictions on the types of foods which patients can consume after surgery. The quantity of food the patient can consume is greatly reduced. This is seen by many patients as being one of the benefits of the laparoscopic sleeve gastrectomy, as is the fact that the removal of the majority of the stomach also results in the virtual elimination of hormones (ghrenlin) produced within the stomach which stimulates hunger.
The nerves to the stomach and the outlet valve (pylorus) remain intact with the idea of preserving the functions of the stomach while reducing the volume. Note that there is no intestinal bypass or malabsorption with this procedure, only stomach reduction.