A Gastric Band (lap band) surgical procedure is a purely restrictive approach to reducing the capacity of the stomach by which a band is placed around the upper most part of the stomach giving it the shape of an hour glass. This band divides the stomach into two portions, one small and one larger portion. No stomach stapling is required. It induces an early feeling of stomach fullness, thereby decreasing food intake. You naturally feel the need to eat less. Any food you eat will be absorbed by your body at least as well as before the operation, as your digestive system is not altered in any way.
Weight reduction will instead be achieved by the fact that you will simply feel the need to eat less. Although this procedure was popular, recently there has been a less dmend as it leads to chances of band slippage, slower weight loss and requires an implanted medical device (the lap band) which is after all a foreign body.In some cases, the lap band's access port may leak and require minor revisional surgery.