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Gastric Sleeve Surgery

Gastric sleeve surgery involves removing part of your stomach to reduce its capacity by 90%. This means that your appetite and the amount of food you can eat will be reduced. Why not get in touch today to see if it could be right for you?

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What is a gastric sleeve?

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Can I get a gastric sleeve?

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Why choose The Hospital Group for gastric sleeve surgery?


What is a gastric sleeve?

Gastric sleeve surgery may be an effective solution if you want to achieve long-term weight loss and other methods aren't working. This procedure – also called a sleeve gastrectomy – removes part of your stomach and makes it much smaller than before.

The term 'sleeve' comes from the shape of the stomach that's created by the operation. As your stomach will be smaller than it was, you'll feel full sooner and won't be able to eat as much. It can achieve great results too – as much as 61.5% of excess weight loss within the first year.

Gastric sleeve surgery has two options - a total gastrectomy or a partial gastrectomy. Which procedure you have will determine how much of your stomach is removed. In both cases, however, the procedure removes an area of the stomach that produces an appetite-increasing hormone.

As a result, it can also help significantly reduce your hunger levels, so if you suffer with obesity and still have a body mass index (BMI) of 35 or over, it can help you lose weight. But it's worth remembering that it'll be most effective if you make healthier lifestyle choices too.

According to the third 2020 National Bariatric Surgery Registry report, a gastric sleeve or sleeve gastrectomy is the second-most common weight loss surgery in the UK. How it actually works depends on whether it's a total or partial gastrectomy.

In a total gastrectomy, the whole of your stomach is removed. This will leave you with a 'sleeve' that's around one-tenth the size of an average stomach. In a partial procedure, however, just the lower half of the stomach is usually removed.

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The procedure is similar to a gastric bypass – but with one main difference. A bypass requires a surgeon to make joins between the stomach and small intestine. But no part of the stomach will be bypassed with a gastric sleeve. It simply creates a smaller channel for food to pass through.

What are the benefits of a gastric sleeve?

There are many benefits you could look forward to after gastric sleeve surgery. When you weigh less, it could make it a lot easier for you to move around. And that means you're able to enjoy a whole spectrum of new activities that may improve your general fitness and wellbeing.

There are also some potential health benefits linked to gastric sleeve weight loss. It is proven to help with a number of health conditions, for example – such as Type 2 diabetes or hypertension (high blood pressure). If you suffer from these conditions, this surgery may be suitable for you.

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Apart from the visible and physical impact of significant weight loss, gastric sleeve surgery may also improve your mental health. That impact could give you a more positive outlook, as well as increased confidence, greater self-esteem, and an overall better quality of life.

Are there any risks?

Although no surgical procedure is 100% risk-free, you can rest assured that gastric sleeve surgery is perfectly safe. All of our surgeons are highly skilled, extremely experienced, and fully regulated by the General Medical Council. They'll do everything possible to keep you safe and healthy.

Of course, there are some sleeve gastrectomy risks you need to be aware of, and it's important that you know about these before you proceed. We'll explain all of the risks involved as part of our consultation with you, so you can weigh them up against the benefits. 

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You can also ask us any questions that you might have about the risks involved with a gastric sleeve operation. As a guide, however, potential complications can include bleeding, infection, nausea, vomiting, or constipation.

Can I get a gastric sleeve?

Gastric sleeve surgery is recommended for male patients with a BMI of 35-50, and female patients with a BMI of 35-55 if diet and exercise alone aren't helping you to lose weight. It can be especially effective if you're prepared to make healthier lifestyle choices too.

By creating a smaller stomach, gastrectomy surgery will restrict your food intake. You'll need to make healthier food choices and take part in regular exercise to achieve the weight loss results you want to see. The outcome? A happier, healthier life.

A gastric sleeve could be the ideal solution if you suffer from a health condition related to your weight. Type 2 diabetes, hypertension, heart disease, or sleep apnoea are some examples. It's also possible that risk factors are.

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At your free consultation, our expert surgeons can tell you if you're suitable for this procedure or type of weight loss surgery.

Why choose The Hospital Group for gastric sleeve surgery?

We're here to help you achieve all your healthy lifestyle goals. As a highly experienced provider of gastric sleeve surgery, for more than four decades The Hospital Group has helped many patients turn their dreams into reality. And we'd like to make that happen for you too.

Our patients are at the heart of what we do, and we're committed to providing a truly personalised experience for every person in our care. If you decide to have private gastric sleeve surgery with us, you can expect:

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We are with you every step of the way on your weight loss journey.

Fast Facts

Surgery Time: 1 - 2 Hours
Time Off Work: 1 Week
Hospital Stay: 1 Night
Full Recovery: From 6 - 8 Weeks
Exercise: After 6 Weeks
Expected Weight Loss: 25 - 30% Of Total Body Weight

Gastric Sleeve Surgery

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Patient Stories

Sarah Bainbridge


Before and after

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Sleeve After 4 v3


jenna before 2 GS 1


jenna update 1


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Sleeve After 2 v2


Shauna Before v2


Shauna After v2


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Sleeve After 5 v2



Gastric Sleeve Surgery FAQs

More FAQs
What happens during gastric sleeve surgery?
Gastric sleeve surgery is a procedure where most of your stomach is removed, reducing its capacity by up to 90%. It includes the part of the stomach that produces the hormone that affects appetite. As such, your appetite is reduced – as is the amount of food you can eat. The process itself is called laparoscopic sleeve gastrectomy. 'Laparoscopic' means 'keyhole' – and is where the surgeon makes several small cuts in your stomach. A telescope with a camera will be inserted, along with several small medical instruments which are used to carry out the procedure. If you’re having a total gastrectomy, much of your stomach is removed and the remainder is stapled into the 'sleeve' shape that gives the procedure its name. Your surgeon will also seal blood vessels connected to the part of the stomach that is removed. Once the procedure is complete, the small cuts will be closed using stitches.
How is it different to a gastric bypass?
Both procedures are forms of weight loss surgery which can help you hit your long-term goals. It's often said, though, that a gastric bypass is more complicated. In a sleeve gastrectomy, part of your stomach is removed in a one-step procedure – and it's as simple as that. Gastric bypass surgery, however, involves two steps. The first is the removal of a part of your stomach and small intestine, while the second is to reconnect the two.
What is the difference between a total and a partial gastrectomy?
A gastric sleeve can either be total or partial, depending on you and your specific situation. A total gastrectomy is the most likely option you'll be given, and it involves the total removal of the stomach (apart from the remaining sleeve). In comparison, only part of the stomach is removed in a partial gastrectomy. This is most likely to be carried out if you have a condition such as an ulcer or growth which needs removed.
What are the pros and cons of bariatric sleeve surgery?
Gastric sleeve surgery can completely transform your health and overall quality of life. Most of our patients are successful in losing weight after the procedure. In the UK, research shows the average excess weight loss rate for gastric sleeve patients is 61.5% after 12 months. Losing a significant amount of weight can lead to a happier, more fulfilling life. It can also give you more energy and freedom to enjoy the things you want to do. Not only that – a gastric sleeve can help to treat and reduce the impact of illnesses and medical conditions linked to obesity. But you should always weigh up the benefits against the risks. This form of weight loss surgery is permanent and irreversible, so you can't change your mind once the procedure is performed. And, as with any surgery, there are some potential risks, which we will discuss with you before you make your decision whether to go ahead with treatment.
How much weight can you lose after gastric sleeve surgery?
How much weight you can lose depends on a variety of factors. According to the NHS, more people tend to lose weight faster with a gastric sleeve or bypass than with a gastric band. That is backed up by research from the National Bariatric Surgery Registry, which found the average excess weight loss after 12 months with a gastric sleeve to be 61.5%. In comparison, the figure for a gastric band in the period between 2013 and 2018 was 38.3%. The amount of weight you could lose with a gastric sleeve will vary from person to person. It'll also reflect the amount of effort that you put into changing your lifestyle and eating habits.
BMI for gastric sleeve: To be a suitable candidate, what should mine be?
It's important to remember that a sleeve gastrectomy is a serious operation. But it can also be an effective solution for people who suffer with obesity and have already tried other methods of diet and exercise to no avail. We can let you know if you're suitable during your free consultation. As a guide, however, the operation could be an option if your BMI is 35 or higher. A gastric sleeve may also be suitable if you suffer from a health condition linked to obesity, such as hypertension.
How long will I be in hospital after private gastric sleeve surgery?
You'll normally stay in one of our specialist hospitals for 2-3 nights after surgery. Rest assured, though, that our team offer exceptional standards of patient care and all of our clinical facilities are registered with the Care Quality Commission.
What is the typical gastric sleeve recovery time?
The overall recovery time will vary, based on you and your unique circumstances. Many of our patients can feel comfortable walking a day or two after the surgery. You could return to work within a few weeks too. But there's no set gastric sleeve stomach healing time, and it's always best to always follow the advice of your expert weight loss surgeon.
What can I eat after my operation?

A gastric sleeve is designed to reduce portion sizes, rather than restricting specific food types. There are fewer types of food you'll need to avoid afterwards, especially in comparison with gastric bypass surgery, although some patients may struggle with certain textures like bread or red meat. Our experienced dietitians will let you know what to eat after your surgery to make sure you're getting all the essential vitamins and minerals you need. We'll also advise you about your short-term gastric sleeve diet after surgery, including solid foods and liquid intake during your aftercare period. It's essential that you stick to the diet your specialist advises or you may not achieve the desired results after the operation.

Is drinking alcohol after gastrectomy surgery OK?
For at least the first four weeks after your operation, we advise that you avoid drinking alcohol. After this, you should be mindful that your tolerance is likely to reduce. While consuming small quantities of alcohol one month after a gastric sleeve is OK, it's likely you'll absorb alcohol into your bloodstream more quickly than you did before.
What is Dumping Syndrome?
Dumping Syndrome or rapid gastric emptying – is one of the potential risks of gastric sleeve surgery. But it's also relatively common following bariatric procedures that bypass the majority of the stomach. It describes symptoms when food moves too quickly through the stomach and is 'dumped' into the small intestine. Just 1% of patients find their symptoms are hard to manage, however, and the sensation often occurs less as time passes. You'll be fully supported by one of our specialist dietitians after your surgery. This helps ensure that side effects like malnutrition and Dumping Syndrome are avoided as far as possible.
How much is a gastric sleeve?

Each patient we help comes to us with different needs. That's why our team creates a bespoke treatment plan that reflects this. It'll be in tune with your weight loss goal and lifestyle dreams. As such, it'll affect how much private gastric sleeve surgery and your aftercare will cost. Don't let this worry you, though - you can use our price check to learn how much your procedure could be. Whatever the figure is, we also have various payment choices.

Is there a gastric sleeve diet to follow post-surgery?
Yes, you’ll need to follow a gastric sleeve diet after your procedure. As 75% of your stomach is removed, naturally your appetite and the portion sizes you can manage to eat will reduce. One of our expert dietitians will advise you on your diet after gastric sleeve surgery, including your food and liquid intake throughout the length of your aftercare. They’ll be able to give you detailed information on what to eat and any foods to avoid after sleeve gastrectomy to ensure you get the desired results following your surgery.

Next steps

First appointment

To start your journey with The Hospital Group, book a free consultation with one of our friendly surgeon assistants. You can tell us why you're interested in gastric sleeve surgery, and we'll be able to answer all your questions: how much it costs, how much recovery time you’ll need, and potential surgery dates. Whenever you decide to book a surgery date, you can secure it for a minimum refundable deposit of £500.

Your free consultation

The next step is to book you in for a free weight loss consultation. This is a two-stage process. The first consultation is with a weight loss practitioner – either a nurse or a dietitian – and can be carried out in your local clinic or over video chat.

Our conversation will cover your goals for surgery and your medical history so that we can see if you're a suitable candidate for this procedure. We'll also discuss the results you might expect, as well as the possible risks and complications of surgery.

You can be certain that you'll get the answers you both want and need. All our specialists have a huge depth of knowledge and receive extensive training on all aspects of a sleeve gastrectomy.

If you're happy to go ahead, we'll book you for a consultation with one of our surgeons. They'll go through all the risks and benefits, as well as confirming if or not you're suitable for surgery.

The surgery

You will meet your surgeon on the day of your surgery so that you can talk through any final questions you might have and read through the consent form. The whole surgical team will be introduced to you before heading into theatre for the procedure.

The specifics of surgery will be discussed prior to the day – you will find out how long it will take, the types of anaesthetics used, and they will talk you through the procedure itself.


After any weight loss surgery, it's more than likely that you'll have to stay in hospital for a short while to start your recovery. You could feel swollen or in pain. But our friendly nursing team will be on hand to look after you and provide any painkillers you might need.

You'll receive intravenous drip hydration straight after a sleeve gastrectomy in order to maintain your fluid levels. As we'll use general anaesthetic in the procedure, you should also ask a family member or friend to drive you home once you're discharged. It's a good idea to have someone with you until the effects of the anaesthetic wear off too.

You won't be left alone to take care of yourself after leaving hospital, however. We'll explain all the things you'll need to do at home and there's always a member of our clinical team you can talk to for support, thanks to our 24/7 helpline.


Gastric sleeve surgery is only the start of a successful and fulfilling journey. To help you move towards your weight loss goals, we believe in providing the highest standards of aftercare following your procedure.

Your body needs time to heal, and you'll need to stay off work until you're ready to return. You should also avoid any heavy lifting or strenuous activity for at least six weeks. As every patient is different, however, we'll discuss your recovery period with you before your procedure is carried out.

We offer different weight loss aftercare packages to support your weight loss journey. We'll talk you through the various options during your consultation process.

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