3 St George Obesity Surgery Unit | Bariatric Book | Bariatric Surgery Overview Laparoscopic Sleeve Gastrectomy Laparoscopic Sleeve Gastrectomy (LSG) is now the most commonly performed bariatric surgery in the world. It has demonstrated reasonable durability, acceptable risk and complications and hence the increasing number of bariatric procedures over the past 20 years is the LSG. The LSG typically results in 25% to 35% body weight loss (50 to 70% excess weight loss) with most of the weight loss occurring in the first 6 months. This substantial weight loss may lead to dramatic improvement and even complete remission of many of the obesity-related co morbidities, including Type 2 diabetes. LSG is a bariatric operation that removes 80% of the stomach to leave a narrow gastric tube, which restricts food intake. Gastric emptying might change after surgery due to increasing intra-gastric pressure. The few published studies on long term data for LSG have demonstrated some durability. Although weight regain is often seen in LSG and other bariatric procedures. This happens when there is lack of follow up hence, despite being a simple operation, long term success rely on patient compliance and clinic follow up. The advantages of a LSG over gastric bypass surgery are that LSG is simpler and safer. It results in less vitamin and micronutrient deficiencies compared to the gastric bypass procedure. Although there are some reports of dumping syndrome due to rapid gastric emptying, the
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