Gastric Band Surgery


Gastric Band surgery involves placing an inflatable silicon ring around the upper portion of your stomach.

This creates a small stomach pouch that sits above the band, with the rest of the stomach sitting below the band.

The inflation of the ring can be adjusted, creating a greater or smaller restriction around the stomach, and in turn causing a restriction on the amount of food that can be consumed.

Gastric Band surgery is a laparoscopic ‘keyhole’ surgery, performed under a general anaesthetic while you sleep.


Professor Purkayastha explains the benefits of Gastric Band surgery, and for which people this might be the better choice of surgery.


Here are some questions about Gastric Band surgery we are frequently asked by patients. We believe it is important you have all the information you require, so you can make an informed decision if surgery is the right option for you.

People who choose Gastric Band Surgery can experience slow, sustainable and long-term weight loss (an average rate is losing up to 2 lbs per week). The surgery involves fitting a surgical band around the stomach pouch, dividing it into two sections. Food fills the smaller pouch first and then slowly fills the lower, larger section of the stomach. You will feel fuller much sooner when eating, and due to the slow release of food into the larger section of the stomach, fuller for longer. As a result, food/calorie intake is greatly reduced meaning sustainable weight loss is achieved. The band’s restriction can be adjusted, allowing comfortable and sustainable weight loss over time.

Although each individual is different, on average someone who has Gastric Band surgery can lose up to 50% of excess body weight in the first year after surgery. 

The positive health outcomes from Gastric Band surgery include significant weight loss and the reduction of conditions related to increased weight. This includes but not limited to:

  • Type 2 Diabetes
  • High Cholesterol
  • High Blood Pressure 
  • Heart Disease 
  • Stroke
  • Mobility issue
  • Joint pains
  • Cancer
  • Sleep Apnoea
  • Infertility

Weight loss and better health can also improve the quality of your life and mental health, boosting self confidence and opening up new doors for how you want to live your life

Professor Puraksyastha will walk you through the preparation steps in the weeks leading up to your Gastric Band surgery. The support you are given is tailored to you, following full metabolic, dietetic and psychological assessments. This is to ensure the best preparation and outcomes possible.

Our specialist dietitian will help you to prepare for your Gastric Band surgery by undergoing a pre-operative liver-reduction diet lasting two weeks. The diet is low in fat and moderate in protein and low in calories, providing approximately 800-1000 kcal per day. The aim of the pre-operative diet is to shrink your liver meaning it can be moved more easily, making the operation safer. In the 24 hours before your surgery, you will be required to restrict your food and drink intake. 

Our specialist psychotherapists will also help you to be best prepared for your surgery, ensuring you have the psychological support to ensure best outcomes.

Dietary changes

There are three stages of texture modification diet following surgery, starting with a liquid diet and gradually building this back up to a long term, solid textured food.

Your specialist dietitian will help explain and guide your through the post-operative diet which follows the below stages:

  • liquid diet (10 days)
  • puree diet (3-4 weeks)
  • soft diet (for around 6 weeks)

This is followed by a lifelong healthy, high protein diet of a normal solid texture from 12 weeks onwards.

Fluid intake remains important and you should aim to drink 1.5 litres a day.  Avoid high calorie fluids including hot drinks made with sugar and fizzy drinks as these can cause bloating and discomfort.

Alcohol should not be taken for three months after surgery and after this time in moderation after food.  

Lifestyle changes

Exercise –  After surgery we advise you to move around as much as possible and ensure that you don’t get dehydrated.  Exercise should be gentle for the two months –  i.e. swimming, walking, cycling. No heavy lifting or weight training for at least eight weeks

In the long-term, increased activity levels are needed alongside a reduced dietary intake for optimal and sustained weight loss after bariatric surgery.

Driving – You should not drive for the first two weeks following surgery and contact your insurance to find out what their guidelines are.  

We suggest that when you are ready to drive that you ask a family member or a friend to drive you to a quiet street where you can attempt an emergency stop. If it feels comfortable then it is fine for you to drive.

Travel – We advise that you do not take a long haul flights for 8 weeks following your surgery

You can take flights of no more than 2 hours duration from two weeks after your surgery

Pregnancy – We advise you to avoid pregnancy for 2 years after surgery. Oral contraception can be restarted 1 month after surgery

Smoking – It is strongly advised to quit smoking in the long-term as this can undo the positive health outcomes from surgery, and increases risk of ulceration in the gastric pouch, chest infections, cancers and heart disease.

After your recovery period has ended, you can start to enjoy the lifestyle changes that come about from better health and increased mobility associated with Gastric Band surgery.

Your aftercare package includes prolonged support from Mr. Purkayastha and your specialist dietitian, as well as the wider Surgical WeightMatters team. 

You will have in-person follow-up appointments with Mr. Purkayastha arranged 7-10 days, 3 months, 6 months and 12 months after surgery with the option of additional follow-up appointments to check in with your progress. 

You will have several post-operative appointments with your specialist dietitian as well, which are spread over 2 years after your surgery and tailored to suit your needs.

There is no limit to how many sessions you can have with the Surgical WeightMatters team. We are with you every step of the way to ensure the best support and outcomes possible.

My Purkayastrha will take time to talk you through the risks involved and ensure you are fully informed before consenting to Gastric Band surgery. 

Every effort ensures these risks are avoided, and Mr Purkayastha is an extremely experienced bariatric surgeon. However, there are short and long-term risks to the Gastric Band surgery which include:

Short-term risks:

  • Pain 
  • Vomiting
  • Bleeding
  • Infection of the wound or band
  • Band slippage
  • Adverse reactions to anaesthesia
  • Blood clots
  • Breathing or swallowing problems
  • Potential complications from nutritional deficiencies
  • Band intolerance

Long-term risks:

  • Gastrointestinal obstruction
  • Hernias
  • Nerve damage
  • Gastroesophageal reflux
  • Low blood sugar (hypoglycemia)
  • Vomiting
  • Blood clotting
  • Stomach ulcers
  • Barrett’s oesophagus

Weight regain, if diet and lifestyle changes are adhered to lifelong habits

Complications during surgery can result in elective or emergency medical or surgical (reoperation) treatment.

You will have regular follow-up appointments with Mr Purkastha to review how your band is performing, and how well your weight loss is going. 

Your band can be adjusted, tightened or loosened, to optimise the performance of the band. Band adjustments are relatively simple and pain-free procedures, the need for which will be assessed in your follow-up appointments with Mr Purakaystha.

Sometimes the gastric band can slip down, creating a larger top stomach pouch. This can be rectified through a simple procedure to reposition the band or adjust its tightness. 

Sometimes a band may need to be removed entirely. This can be the result of ineffective weight loss, weight regain or intolerance to the band. If this occurs, it is common to then explore other more effective bariatric surgery options such as the Sleeve or Bypass. 

Symptoms of band intolerance include prolonged periods of pain after eating, excessive nausea, difficulty with swallowing food.

If your band is not performing and aiding you in desired weight loss, the option of revisional surgery may be explored. My Purkayastha will talk you through your options and whether this would be beneficial to you.

Next steps

If you are interested in Gastric Band surgery and still have some questions, please book a complimentary call with our friendly Patient Concierge team. 

They will listen to your story, answer your questions, and ask about your health goals. If you are ready, they will get you booked in to meet your surgeon for a pre-surgery metabolic assessment and consultation.


This animation explains the changes made to your digestive system during Gastric Band surgery.


Speak with our friendly patient concierge team, and let us answer any questions you have about weight loss surgery.


Your weight loss surgery journey starts when you meet your Bariatric Surgeon for a pre-surgery metabolic assessment and consultation.

It is important you can ask all the questions you have about surgery, and make a connection with the person who will perform your surgery.

Weight & Health History

Current Health Status

Goals & Aspirations

Pros & Confs of Different Surgeries

Bespoke Surgical Pathway Created For You


Your surgeon will work closely with your Multidisciplinary Team (MDT), a Bariatric Dietitian and Bariatric Psychotherapist . Together they will ensure you are fully prepared for your surgery.

All pre-surgery blood work is included in your bariatric package. In some instances we may require additional diagnostic tests, or refer you to a consultant in our wider MDT; Endocrinologist, Sleep Specialist, Bariatric Psychiatrist.

Your safety and care is at the heart of what we do. Exceptional outcomes come from good preparation and planning, and an integrated team that shapes your treatment to your individual needs. 

Bariatric Dietitian Assessment & Pre-Surgery Diet Plan

Bariatric Psychotherapist Assessment & Motivation

Pre-Surgery Bloods & Other Diagnostics

Anaesthetist Care Call

Pre-Surgery Consultation With Your Surgeon


Your weight loss surgery includes a 2-night stay, in a private room, at the prestigious King Edward VII hospital, located in central London’s world-class medical district.

On arrival you will be met by your Specialist Nurse Practitioner, who will guide you through each step of your hospital stay.

Your surgeon will meet you before your surgery, and will check in with you, and your progress, the day after your surgery.

Specialist Nurse Practitioner Orientation

2-Night Private Room Stay

Weight Loss Surgery Procedure

Hospital Aftercare & Surgeon Assessment

Discharge Care Plan & Medication


Exceptional outcomes from weight loss surgery come from good planning and preparation, medical excellence at every touch point, and aftercare support that guides positive behaviour change.

Your bariatric team works with you closely over the next 2-years, as you adjust and transition to the opportunities and life changes post-surgery. 

Sessions with your Bariatric Surgeon, Dietitian and Psychotherapist will be complemented by monthly group sessions and motivational email support, all curated with ongoing guidance from your Patient Concierge team.

Surgeon Follow-Up Consultations

Diagnostics Bloods Included

Ongoing Dietitian & Psychotherapist Support

Monthly Support Groups & Email Motivation

Patient Concierge Care & Guidance


We believe it is important to be upfront and transparent about the costs of the various bariatric surgeries we provide.

The price below is for your Gastric Bypass 2-Year Package.

Click on the buttons to see exactly what is included in the price, and any additional extras that you may encounter.

GASTRIC BYPASS = £19,975**

** This fee is the full amount that the majority of our patients pay for this bariatric procedure, however, some patients may require an additional level of support.
Transparency on cost is one of our core values, so we will always be clear and upfront if we think your care requires an extra layer of medical excellence, and the fees associated with this.


  • Diet and lifestyle assessment with a specialist bariatric dietitian
  • Eating and psychological assessment with a specialist bariatric psychotherapist
  • Pre-surgical blood tests
  • Final surgical readiness consultation with your bariatric surgeon
  • Dedicated patient concierge scheduling your appointments and answering any questions you have


  • Pre-operative assessment
  • Welcome call with your specialist nurse practitioner who will be your hospital care coordinator
  • 2-night hospital stay in a private room at the King Edward VII hospital
  • All hospital fees associated with your bariatric procedure, including post-op blood analysis
  • Anaesthetist fees on the day of your surgery
  • Surgeon fees for your surgery and next-day review
  • 48-hour post-surgery on-call availability of your surgeon (if required)
  • 2-weeks of take-home medication you require as you leave hospital and transition back home


  • Follow-up consultations with your bariatric surgeon at 10 days – 3 months – 6 months – 1-year
  • Diagnostic blood tests included at all of these appointments
  • 4-hours of dietetic support with your bariatric dietitian, to guide and coach you through transitions in your eating and lifestyle behaviour
  • 4-hours of psychological support to help you shape a positive mindset, and develop new healthy habits
  • Dedicated patient concierge to answer any questions you have, and help you schedule appointments
  • Monthly patient online group support meetings, facilitated by our dietitian and psychotherapy teams
  • Curated workflow of timed emails to educate, motivate and inspire you to achieve exceptional outcomes

Initial Consultation With Your Surgeon

The pre-surgery metabolic assessment and consultation is not included in your package price, as some people may decide that weight loss surgery is not the right treatment pathway for them. The cost of this 60-minute consultation is £400.

Additional Diagnostic Testing

Your bariatric surgeon may request you have additional diagnostic testing before or after your surgery. We list the types of diagnostics below, and will provide the current price of the test at the time of referral.

  • CT Abdomen / Pelvis
  • CT Chest
  • Water Soluble Contrast Swallow & Meal

Hospital Accommodation

Your 2-night hospital stay in a private room is quoted for standard ward accommodation. Extra fees apply when you choose to stay an extra night the day before your surgery, or in the extremely rare situation when a complication may require an extra level of hospital care. We list the types of additional accommodation below, and will provide the current price list at the time your surgery is booked.

  • Pre-Surgery Accommodation
  • Standard Ward Accommodation
  • HDU Accommodation
  • ICU Accommodation