Sleeve Gastrectomy

The Laparoscopic Sleeve Gastrectomy (LSG) has been performed in Australia for around 10 years, and involves up to 85% of the stomach being permanently removed via a stapling device, leaving the remaining stomach to form a tube. Due to the restriction in size, the stomach holds much less food than previously, resulting in significant weight loss.

The procedure is performed laparoscopically (keyhole surgery), and patients typically stay in hospital for 2-3 nights after the procedure. This procedure is designed to be long-term and permanent (it is not reversible), and when combined with one of our comprehensive and high-intensity aftercare programs, patients can achieve long-term optimal health and weight loss results.

Patients who undergo LSG experience faster weight loss than with most other surgical or non-surgical options, with an expected weight loss of around 30% TBWL over 12 months (Total Body Weight Loss; ie a 100 kg person would lose 30kg on average). We often refer to “excess weight loss” when measuring the results from weight loss surgery, and we typically see around 60% excess weight loss (EWL) at 12 months with the LSG.


As with any weight loss procedure, a critical component of your success will be engaging with your team of doctors, dietitians, psychologists and support staff. Research confirms that the more often you contact our team, the more successful your weight loss journey will be. As part of the LSG programme, you will be expected to meet regularly with one of our dietitians, as well as our nurses and behavioural therapists, to ensure you are well-educated to keep the weight off long-term.

The gastric sleeve is considered a permanent procedure, due to the permanent removal of a portion of the stomach, and has a lower complication risk than other surgical procedures such as the gastric bypass. Unlike the gastric bypass, with the sleeve gastrectomy there are generally not malabsorption or nutritional issues.

The LSG works in multiple ways. One way the procedure works is the restrictive element; patients are only able to eat a small meal (typically around 1/2 a cup) before the stomach is full. The stomach then sends signals to the brain to tell it that you are full. It is important patients chew your food slowly and take time between mouthfuls, as this this allows for these signals to reach the brain so patients no longer feel hungry. The second way the LSG works is hormonal; when the procedure is performed, part of the stomach that is removed is the part that normally produces ghrelin, a hormone that induces hunger. The combination of these two mechanisms allows patients to lower their caloric intake, resulting in significant weight loss.

Quick facts about Gastric Sleeve

  • Laparoscopic/keyhole surgery – takes around 45-60 mins
  • Considered permanent due to the removal of up to 85% of the stomach
  • Rapid weight loss; most of the weight loss is experienced in the first 12 months
  • Average weight loss of around 30% of total body weight or 60% of excess weight
  • Lower complication risk than other surgical options like Gastric Bypass
  • Hospital stay of 2-3 nights
  • Risks can involve bleeding, re-operation, stricture or narrowing of the sleeve, and reflux, among others.