What is a gastric band?

A gastric band, sometimes called a lap band or an adjustable gastric band, is a soft silicone ring that’s placed around the upper section of your stomach. This creates a small pouch above the band at the top of the stomach and a narrow opening into the rest of the stomach.

Because the upper pouch fills quickly with food, you'll feel full after eating only a little. It helps you stick to much smaller portions than you ate before the procedure. The narrow opening also slows the passage of food out of the pouch and into the rest of the stomach, helping you stay satisfied for longer between meals.

The gastric band is connected by a thin tube to a small injection port that’s placed just beneath your skin, usually somewhere on your abdomen. During follow-up appointments, your bariatric surgeon or specialist bariatric nurse can adjust the band by adding or removing sterile fluid through this port, either tightening or loosening the band, tailoring the level of stomach restriction to suit your changing needs.

Unlike other forms of bariatric surgery, such as gastric sleeve surgery or gastric bypass surgery, gastric band surgery doesn’t involve removing or rerouting any part of your digestive system, only restricting the passage of food through part of your stomach. If necessary, the gastric band can also be removed, making it a reversible weight loss procedure.

How does a gastric band work?

A gastric band works by helping you feel full after only eating a small amount of food, reducing how much you eat.

The gastric band is placed around your upper stomach. When it’s tightened, it creates a small pocket at the entrance of your stomach that can hold around a quarter of a cup’s worth of food. Once this pocket fills as you eat, you’ll feel full, helping you eat less and reducing your daily calorie intake.

For the gastric band to work effectively, it needs to be adjusted correctly. Your surgeon will fine-tune the band during follow-up appointments by adding fluid to tighten it or removing fluid to loosen it via the port placed under your skin. Most patients require several adjustments during the first year after gastric band surgery before the ideal level of restriction is reached. The ideal restriction will usually also change over time as you lose weight.

It's important to understand that a gastric band is a tool to support weight loss rather than a cure for obesity. Long-term success will depend on making lasting dietary and lifestyle changes alongside regular follow-up care.

Choosing the right foods after gastric band surgery is also essential. Solid, nutritious foods generally provide the best feeling of fullness, helping you eat less. High-calorie liquids, like milkshakes, sugary drinks, and alcohol, can pass through the band more easily without you feeling full. Regularly consuming drinks like these can slow or even reverse your weight loss progress. At Ramsay, our healthcare teams can help you understand how to follow a gastric band diet to make the most of your procedure.

Am I suitable for gastric band surgery?

Gastric band surgery may be suitable if you:

Have a body mass index (BMI) of 40 or above
Have a BMI of 35 or above and an obesity-related health condition, such as type 2 diabetes, high blood pressure, or sleep apnoea
Have tried non-surgical weight loss methods, including diet, exercise, or medication, for at least six months without achieving lasting results
Are fit enough to have a general anaesthetic
Are committed to making permanent dietary and lifestyle changes
Are willing to attend regular follow-up appointments for band adjustments and ongoing support

Lower BMI thresholds may apply for people from some ethnic backgrounds, including South Asian, Black, and Middle Eastern communities. Obesity-related health conditions can often develop at lower BMI levels.

A gastric band may be especially suitable for you if you're looking for a reversible weight loss procedure or prefer to avoid permanent changes to your digestive system. However, gastric band surgery isn't the right option for everyone. At Ramsay, a bariatric consultant surgeon will carry out a thorough assessment of your case and will discuss which weight loss surgery is most appropriate for your individual circumstances.

What does gastric band surgery involve?

The details of surgical procedures can vary from patient to patient, but the typical gastric band surgery process with Ramsay Health Care usually involves the following process:

Before your gastric band surgery

Your treatment will begin with a detailed consultation with one of our bariatric specialists. During this appointment, your medical history, BMI, current health, and previous weight loss efforts will be reviewed. You'll also receive a nutritional assessment. In some cases, a psychological assessment may be recommended to ensure you're fully prepared for surgery and the lifestyle changes that will follow it.

Before your operation, you'll have routine pre-operative tests, which may include blood tests, blood pressure measurements, and heart rate checks.

Most patients are also asked to follow a very low-calorie diet (VLCD) for two to three weeks before the surgery. This helps shrink the liver, making the operation safer and easier to perform.

You'll receive full instructions from your Ramsay team before your procedure, including when to stop eating and drinking, advice on stopping smoking, and information about wearing compression stockings to help reduce the risk of blood clots.

During your gastric band surgery

Gastric band surgery is performed under a general anaesthetic and usually takes around one hour to complete.

Your surgeon will carry out the procedure using keyhole surgery (laparoscopic) techniques rather than open surgery. They will make three to five small incisions (cuts) in your abdomen. A laparoscope (a thin tube with a camera attached) will be inserted through an incision, allowing your surgeon to view the operation on a monitor. This helps them guide where they position the adjustable silicone band around the upper part of your stomach.

The gastric band will be secured in place by folding a small section of the stomach over it and stitching it into position. The injection port, connected to the band by a thin tube, will be placed beneath the skin, usually close to your navel. This allows future adjustments to be made to the band without further surgery. Once the procedure is complete, the incisions are closed with dissolvable stitches.

The gastric band will be partially inflated during the operation, but will be fine-tuned – either tightened or loosened – during your follow-up appointments, as necessary.

After your gastric band surgery

Immediately after your surgery, you’ll be taken to a recovery room where you’ll be monitored as you wake up from the anaesthetic. Most patients stay in hospital overnight after their procedure, and can return home the following day.

Immediately after your gastric band surgery, you'll receive fluids through a drip until you're able to drink independently. You'll also wear compression socks to help reduce the risk of developing deep vein thrombosis (DVT).

You'll be encouraged to get up and walk as soon as it's safe, as this will help your recovery and reduce the risk of complications.

Gastric band recovery time

Recovering from gastric band surgery is usually quicker than many people expect. Most patients stay in hospital overnight and can return home the next day. Recovery will continue to improve steadily over the following weeks, with patients gradually progressing through different stages of post-operative diet.

Gastric band recovery times will vary by patient, but most people can expect the following recovery process:

The first two weeks of your gastric band surgery recovery

During the two weeks after your surgery, you'll follow a liquid-only diet to allow your stomach to heal around the gastric band. During this time, it's important to rest, stay hydrated, and care for your wound sites as instructed by your clinical team. Gentle walking is encouraged to support your circulation and healing, and to reduce the risk of blood clots forming.

Many people feel well enough to return to desk-based work within one to two weeks after their procedure, depending on the nature of their job and how well they’re recovering.

You should only drive once you're no longer taking prescription pain medication and can safely perform an emergency stop. For most patients, this is around one to two weeks after surgery.

Weeks three to four of your gastric band surgery recovery

As your recovery progresses, you'll gradually move on to soft and pureed foods. You can slowly increase your activity levels, although strenuous exercise and heavy lifting should still be avoided.

Weeks five to six of your gastric band surgery recovery

Between five and six weeks after your gastric band surgery, you'll usually begin reintroducing soft solid foods under the guidance of your specialist dietitian.

If your job is more active, such as involving manual labour or heavy physical activity, your surgeon may recommend waiting up to six weeks before returning to work.

Band adjustments and long-term recovery

Your first gastric band adjustment is usually carried out around six weeks after your surgery, once your stomach has fully healed. The band can then be tightened or loosened by adding or removing sterile fluid through the injection port beneath the skin.

Most patients require around four to six band adjustments during the first year to achieve the right level of restriction. From around week four onwards, your consultant may also recommend a supervised exercise programme and physiotherapy to help you build strength and support healthy, sustainable weight loss.

Weight loss following gastric band surgery is gradual. Most people lose around half of their excess body weight over one to two years. This is provided they follow the recommended diet, stay physically active, and attend their follow-up appointments.

Gastric band side effects and risks

Gastric band surgery is a commonly performed procedure. As it’s a form of minimally invasive keyhole surgery that doesn’t involve making permanent changes to your digestive system, it generally carries a lower risk profile than more invasive bariatric procedures, although all surgery carries some risk of complications.

However, all surgical procedures carry some risk of complications. With gastric band surgery, most side effects are temporary and improve as your body heals and you adapt to eating smaller meals. Less common complications may require further treatment.

General risks associated with surgery include:

Pain after the operation
Bleeding
Scarring
Blood clots forming, including deep vein thrombosis (DVT)
Wound infections

Common side effects after gastric band surgery include:

Nausea or vomiting, particularly if you eat too quickly, take large mouthfuls, or eat more than your band comfortably allows
Bruising, swelling, and discomfort around the incision sites
Acid reflux or heartburn
Constipation, especially during the early stages of recovery

You can help minimise many of these symptoms by following your dietary advice carefully and attending regular follow-up appointments.

Procedure-specific risks of gastric band surgery:

Although uncommon, complications specific to gastric band surgery can include:

Band slippage: The band moves from its original position and may cause pain, vomiting, or difficulty eating. Further surgery may be needed to reposition or remove the band
Band erosion: The band gradually wears through the stomach wall. This affects approximately 3 to 4 people in every 100 and usually requires the band to be removed
Band leakage or deflation: Reducing the restriction provided by the band and may require adjustment or replacement
Port-related problems: Including infections, leakage, or movement of the injection port beneath the skin
Oesophageal dilatation: The food pipe stretches if the band is too tight. This can often be resolved by loosening the band
Gallstones: These can develop during rapid weight loss. In some cases, medication may help reduce this risk

Compared with gastric sleeve surgery or gastric bypass surgery, gastric bands have a higher likelihood of requiring revision surgery or removal in the long term. Your Ramsay consultant will explain the benefits and risks of each procedure when recommending the most appropriate treatment for your individual circumstances.

Gastric band (UK) cost

Private gastric band surgery at Ramsay Health Care is available from £7,400 and includes a comprehensive 24-month aftercare programme designed to support your long-term success. You can also view our weight loss surgery prices for other bariatric procedures. Costs can vary by patient.

After a consultation with one of our bariatric specialists, we’ll give you a personalised quote for your treatment, which will be valid for up to 60 days.

You can choose from a range of options to pay for your gastric band surgery, including:

0% Payment Plans: Spread the cost of your gastric band surgery with our flexible payment plans. Choose fixed, monthly payments over a time period that suits you.
Self-fund treatment: With our all-inclusive Total Care package, you’ll pay a one-time payment at a pre-agreed price that covers all the treatment you’ll need.
Your own medical insurance: Your healthcare insurance may cover your private gastric band surgery with us. However, most major private medical insurance policies do not cover weight loss surgery as standard, so you should check with your insurer and get written confirmation before commencing treatment.