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Gastric Sleeve

What is a Gastric Sleeve?

Sleeve gastrectomy is a weight-loss surgery that removes 80% of the stomach and changes its structure to restrict food intake. The result is a narrow gastric “tube” or “sleeve”.


How is the surgery performed?

The surgery can be performed in two techniques. The most popular technique is the laparoscopic sleeve gastrectomy because it is the most minimally invasive technique - several small incisions are made to insert instruments and a camera to guide throughout the procedure. The second technique is open surgery – the stomach is accessed through a vertical incision in the client’s abdominal wall. The surgery permanently reduces the size of the stomach and decreases food intake. No intestines are removed or bypassed.


How does it work?

A stomach can hold 500ml of food, after surgery the capacity of the stomach is reduced to 150ml. Due to the reduction in capacity, the intake of food that is consumed in one sitting is reduced significantly. A client will realise they feel satiated quicker. The second factor affected is hunger, due to the reduction of stomach’s area the production of ghrelin is reduced. Ghrelin is the hunger hormone that is responsible for stimulating appetite, increasing food intake and promoting fat storage. These two factors combined will lead to weight-loss.

Who is a good candidate for a Gastric Sleeve?

  • BMI is 40 or higher
  • BMI is 35 or higher and client has a life threatening or disabling problem due to excess weight

The client needs to change lifestyle and follow post-operative recommendations accordingly.



Most people lose weight very quickly in the first year after having the sleeve gastrectomy. It is common to lose between 50–60% of their excess body weight. The key to achieving greater weight loss and weight maintenance in long term is to follow regular exercise and eating regime.

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