Gastric sleeve surgery, or sleeve gastrectomy, is surgery for weight loss that involves removal of a large part of the stomach. After the surgery, the person feels full after eating a small amount of food.
The surgery also makes people feel less hungry because a smaller stomach will produce lower levels of a hormone called ghrelin, which causes hunger.

When should I consider gastric sleeve surgery?

Gastric sleeve surgery is a form of bariatric surgery, also called weight loss surgery. It is sometimes recommended for people who are very obese, or who have health problems caused by obesity. You should only consider gastric sleeve surgery after trying alternatives.
The first step is usually to try changes to your food intake and your daily activity and exercise. There are also some medicines that can help people lose weight. Surgery is usually thought about only after these other options have been tried.
Losing weight after gastric sleeve surgery can help reduce problems with type 2 diabetes, asthma episodes and blood pressure, and can help improve heart health.
How do I prepare for gastric sleeve surgery?
If you are considering surgery, you are likely to need different tests to make sure that gastric sleeve surgery is right for you.
Your doctor will advise you about any changes you need to make to medicines and your diet in the weeks or days before surgery. And you will need to stop eating and drinking the night before you have the surgery.

What happens during gastric sleeve surgery?

The keyhole surgery is performed using a general anaesthetic.
The surgeon will use a stapling device to create a small tube or 'sleeve' in the stomach, then remove the rest of the stomach.
After surgery, the stomach will hold only about a fifth of what it did before.
During gastric sleeve surgery, a large part of the stomach is removed

What can I expect after the procedure?

If you have gastric sleeve surgery, you will first start with liquid foods. Over the next few weeks, you will change to pureed food, then to solid food. Your meals will be much smaller and you may have to stop drinking with meals due to your small stomach.
You will need to make significant lifestyle changes after bariatric surgery to lose weight and keep it off. For example, you will get nutritional advice from a dietitian on how to change your eating habits to keep healthy while losing weight.
Your meals will be much smaller than before. And you will probably take vitamins or other supplements for life.
You will also have to, and be able to, increase the amount of physical activity you do.

What can go wrong?

This is usually a safe procedure. Sometimes people can have bleeding or leakage of fluid from the stomach.
The may sleeve expand over time, causing you to regain some of the lost weight.
Talk to your doctor about the risks of the procedure

Gastric bypass and other weight-loss surgeries — known collectively as Bariatric surgery — involve making changes to your digestive system to help you lose weight. Bariatric surgery is done when diet and exercise haven't worked or when you have serious health problems because of your weight. Some procedures limit how much you can eat. Other procedures work by reducing the body's ability to absorb nutrients. Some procedures do both. While bariatric surgery can offer many benefits, all forms of weight-loss surgery are major procedures that can pose serious risks and side effects. Also, you must make permanent healthy changes to your diet and get regular exercise to help ensure the long-term success of bariatric surgery.