Laparoscopic one anastomosis gastric bypass

The laparoscopic one anastomosis gastric bypass (OAGB) is a recently endorsed bariatric procedure by the International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO) and the American Society for Metabolic and Bariatric Surgery (ASMBS). This procedure involves creating a small gastric tube and bypassing 200 cm of the small intestine with a single anastomosis between the gastric tube and the small intestine. It effectively reduces food intake and nutrient absorption, leading to significant postoperative weight loss. The weight loss and diabetes improvement effects of OAGB surpass those of the laparoscopic sleeve gastrectomy. The surgical technique for OAGB is simpler than that of the laparoscopic Roux-en-Y gastric bypass; however, it increases the risk of bile reflux. Additionally, OAGB shares similar long-term complications with the laparoscopic Roux-en-Y gastric bypass, including nutritional deficiencies, marginal ulcers, and dumping syndrome.

ADVANTAGES

1. The weight loss effect is better and faster than laparoscopic sleeve gastrectomy: about 30% to 35% of body weight can be reduced in the first year.
2. The treatment effect for diabetes in patients with mild obesity is better than that of laparoscopic sleeve gastrectomy.
3. The surgery is simpler than laparoscopic Roux-en-Y gastric bypass.

DISADVANTAGES

1. Postoperative complications may include bile reflux, anastomotic ulcers, and dumping syndrome.
2. Postoperative complications (6%) and mortality (0.3%) are higher than laparoscopic sleeve gastrectomy.
3. Risk of insufficient absorption of nutrients, leading to anemia, osteoporosis and other complications.
4. It is impossible to perform a gastroscopy on the lower part of the stomach after surgery, making it hard to detect diseases in this area.