Gastric Sleeve

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Gastric sleeve surgery is an operation performed by removing a large part of the stomach. This circumference is approximately 80% of the entire stomach. The shape of the hind stomach is enlarged to resemble a tube. Most of the stomach is consumed as consumption. In this way, it is aimed to gain weight


The operation is performed by removing the upper part of the stomach, its body and most of the antrum. The minor margin and adjacent parts of the pylorus are left in place. It is usually applied laparoscopically. A stomach with a volume of approximately 150 mL remains. Since there is no change in the digestive system, there is no absorption problem.


With gastric sleeve surgery, it is aimed to lose weight by reducing nutrition education. After training on the operation, they are trained to benefit from this process. It can also be applied as the first step of other surgeries such as gastric bypass and duodenal switch.

Operation criteria

In order for sleeve gastrectomy surgery to be performed, the person must be over the age of 18 and the body shape must be over 35.


Within one year of the operation, 80% of the excess weight of the patients will be lost, and within two years all of them. Patients can come to the diary after about a week, return to work after three weeks.

How much weight will I lose with the sleeve?

How much weight will I lose with the sleeve? On average we expect weight loss results for gastric sleeve patients to be approx 60-70% of their excess weight during the first two years, although most of the weight is lost during the first year. Some people will inevitably do better than this, and some not so well.

When can I drive after gastric sleeve surgery?

When can I drive after gastric sleeve surgery? We advise that you should not drive a motor vehicle for 2-3 days after your sleeve operation. This is to allow the effects of the anaesthetic and any post-operative analgesia (painkillers) to wear off. It will take around 10-14 days for your wounds to heal, so at first you may find that driving is a little uncomfortable.  

Is it possible to regain weight after a gastric sleeve?

Is it possible to regain weight after a gastric sleeve? Yes, it is possible to regain weight following gastric sleeve surgery and this tends to happen if patients return to old eating habits. A sleeve is extremely effective if you follow our guidelines but it is important to remember that a gastric sleeve is not a “cure” for your weight problems, rather a powerful tool to help you manage your weight. If you consume high quantities of junk food and don’t engage in physical activity, you may put weight back on, but this is the case for all weight loss options. It’s important to continue to plan your meals, eat small portions and to engage in physical activity in order to maximise and, more importantly, maintain your new, lower weight.

What does your BMI have to be for a gastric sleeve?

What does your BMI have to be for a gastric sleeve? As a general guide, you are eligible for gastric sleeve surgery if you have a BMI of 35kg/m2 or over, and have exhausted other option without success. Use our BMI checker to calculate your own BMI, and see if you’re eligible. You can read more about your eligibility for sleeve surgery, both in the private sector

Can I have a gastric sleeve on the NHS?

Can I have a gastric sleeve on the NHS? Gastric sleeve operations are done in the NHS, as are gastric bypass and gastric band procedures. Due to strict NHS eligibility criteria, driven by limited budgets, only a tiny proportion of those who are eligible for weight loss surgery will be offered it in the NHS. We calculate that only about 1 in 2,500 people in the UK eligible for gastric sleeve will have surgery in the NHS.

Does a gastric sleeve make you constipated?

Does a gastric sleeve make you constipated? It is possible that a gastric sleeve could cause constipation. As you will be eating less, the amount of fibre in your diet will drop, and your bowel activity will decrease. However, there are plenty of very effective remedies that can help with constipation, and you will be given additional advice about this following your operation.

Does the gastric sleeve work for everyone?

Does the gastric sleeve work for everyone? Every medical treatment has a failure rate, and the sleeve gastrectomy is no exception. A small proportion of sleeve patients, about 10%, won’t be successful for a variety of reasons such as an inability to comply with nutritional requirements or a lack of physical activity. Some patients can also experience problems if they fail to take vitamin and mineral supplements.

Is a gastric sleeve safe?

Is a gastric sleeve safe? As with all surgical operations, there are associated risks and a gastric sleeve is a more invasive procedure than a gastric band which is why it is important to choose a specialist bariatric surgeon with considerable gastric sleeve experience. In the hands of a highly experienced Healthier Weight surgeon, the gastric sleeve is still a safe and effective procedure. Read more about our sleeve centres and surgeons here.

What do I need to do before gastric sleeve surgery?

What do I need to do before gastric sleeve surgery? Prior to gastric sleeve surgery, you will be required to follow a low-calorie pre-operative diet. The length of time that you will follow the pre-op diet will depend on your starting BMI and will range from a minimum of 5 days for lower BMIs, up to a maximum of 6 weeks for higher BMI.  
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