Also known as sleeve gastric bypass or loop gastric bypass.
Mini gastric bypass surgery is a simpler and less invasive procedure than traditional gastric bypass surgery. Using a laparoscope, a surgeon forms the stomach into a narrow tube, which is then attached directly to the small intestine about six feet from its starting point. This allows food to bypass the initial highly absorptive section of the small intestine. Though less invasive, the mini gastric bypass surgery is still a procedure that comes with risks and complications. For long-term weight loss success, it is also necessary for the patient to follow a healthy lifestyle.
In the first part of mini gastric bypass surgery the stomach is divided and a small tube of stomach created which becomes the pouch. This is the restrictive part of the procedure and means that only a very small amount of food can be taken at any.
Next, the surgeon brings up a loop of bowel (about 200cm long) and joins this to the lower part of the stomach pouch. This means that food passes from the small pouch into the small bowel where it meets the digestive juices which have moved downwards from the main part of the stomach. In effect, therefore, about 2m of small bowel has been bypassed before absorption of food (and calories) can take place. Fewer calories absorbed, means weight loss.
• Mini gastric bypass surgery is reversible
• Shorter recovery time than regular gastric bypass surgery
• Relief from symptoms associated with obesity after the weight begins to come off
• Lower risk of post-surgery complications.
• Lower risk of infection because of minimal incisions required
• Rapid healing of incisions so patient can resume regular activities shortly after the procedure
While the mini gastric bypass procedure offers a number of benefits, there are also some risks to keep in mind. Some patients may experience a leakage of the stomach if the staples become loose, or the stomach and surrounding tissues may become infected from the trauma caused by the procedure. If the food passes too quickly through the digestive tract, the patient may experience diarrhea or nausea that can be corrected and managed with medication and some dietary changes.
The main difference between the standard Roux-en-Y gastric bypass procedure (RYGBP) and the mini gastric bypass (MGBP) can be seen by comparing the two diagrams opposite. It is clear that in the case of the MGBP there is only one anastomosis, whereas in the RYGBP there are two – an upper and a lower. Because of this the MGBP can be done in less time than the RYGBP and – at least theoretically – with fewer early complications.
Studies show that weight loss and health benefits resulting from mini gastric bypass are essentially the same as for standard Roux-en-Y gastric bypass.