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The gastric sleeve technique is a surgical procedure in which the stomach is resected or reduced in size by sutures in its wall, so that the reduction in stomach volume quickly creates a feeling of fullness when eating a few foods. It is a procedure with a low complication rate and it is indicated for people with a high body mass index.
In general, it is possible to reduce overweight by 70 or 80%, thus improving the quality of life. The surgical procedure is minimally invasive and is performed laparoscopically under general anesthesia. In general, the procedure takes about 60 minutes and the post-operative phase requires a hospital stay of about 48 hours.
The gastric bypass technique is a mixed technique, both restrictive and malabsorptive.
First, a reduction of the stomach is performed, forming a small bag of about 20 or 30 ml capacity compared to the 2 litres of the whole stomach.
Then, the malabsorptive technique consists of connecting the small gastric pouch directly to a part further away from the small intestine, thus avoiding the passage of food through the stomach, duodenum and jejunum. This limits the absorption of nutrients from food, mainly fats. The gastric bypass technique is performed by laparoscopy and usually requires the patient to stay in hospital for 2 to 4 days.