How The Surgery Works
The surgery works by reducing stomach size by 80-90%. It does this by taking away the gastric fundus. Instead of a large sack, your stomach becomes a narrow tube.
Since your stomach is now smaller, you’ll feel full after smaller meals and you should feel hungry less often as the amount of the hormone ghrelin that tells your brain to eat is also smaller.
After surgery, the food will follow the normal route into your stomach and into your small intestine.
Although the surgery is permanent, it has little effect on the way your body absorbs what it needs from food. The risk of complications is much smaller than with bypass procedures.
You can expect to lose 60-70% of your excess body weight in the first 12–18 months following surgery. However, an excess weight loss of 100% or more is not uncommon in patients who exercise intensively.
Weight loss after surgery will depend on the lifestyle changes that you make, such as increasing your exercise activity, and maintaining a healthy diet.