• Manchester, Liverpool, St Helens & Birmingham
  • 03300 58 44 55
  • clinic@pallmallbariatrics.co.uk

Gastric Sleeve

Permanent Weight Loss

Lose 50-80% of your excess weight with gastric sleeve surgery. Permanent weight means you can live your future, for longer.



The gastric sleeve (also called a sleeve gastrectomy) is a popular choice if you want permanent weight loss results averaging 50-80% of excess weight and a ‘sleeve it and leave it’ mentality with no physical adjustments needed. Great if you are limited by location, travel a lot or cannot commit to regular follow up appointments.

Ideal for patients who are stepping up from a gastric band or who have failed to lose sufficient weight from diet and exercise. It is also a good option if a gastric band is not right, and you feel a gastric bypass is too invasive. It is a lower risk option compared to a gastric bypass and is therefore suitable if you are younger, or with less existing health issues.


years experience

80 %

weight loss

0% %

Theatre Returns

0% %

mortality rate



Procedure Time

Approx 90 minutes.

Back to Work

Recovery in 1x week.


2x years open clinic.

Hospital Stay

1-2 days.


£8,500 – £10,900


3 or 5 year warranty.





Weight Loss

You can expect to lose 50-80% of your excess weight within 2 years. Surgery eliminates production of the hormone Ghrelin, resulting in appetite supression.

Medical Benefits

You can see major improvements in obesity related risk factors such as type 2 diabetes, high cholesterol, raised blood pressure and sleep apnoea.


You will see major improvements in your lifestyle such as your physical capacity, mobility for movement and a reduction in joint pains in addition to an improvement in mood and self-esteem.



  • Preserve Structure – this surgery does not change the structure or mechanism of the stomach. Only its size and capacity change
  • Low Maintenance – the ‘sleeve and leave’ option where no adjustments are needed. This is ideal for those who can’t commit to follow up appointments or band adjustments. Especially if you travel regularly, you are limited by location (i.e. live out in the countryside) or you are not mobile enough to attend clinic
  • Conversion – you can easily convert a gastric sleeve to another bariatric procedure at a later date
  • Easier Procedure – a gastric sleeve requires less time under anaesthetic compared to a gastric bypass
  • Lower Risk – the risk of a vitamin deficiency is less than gastric bypass

During surgery, approximately 85% of the stomach is removed, leaving only 15% remaining (about the size of a banana) with a capacity of about 80-150cc.

The surgery works in two ways:

  1. Restrictive Element – Reducing the volume of the stomach so the patient eats small amounts of food, feels full quicker and thus eats less overall
  2. Change to Gut Hormone – Gut hormones are effected that regulate appetite (especially Ghrelin – an appetite stimulant). Following the procedure, Ghrelin levels fall to only very low levels and patients lose their appetite

With any type of surgery, complications can sometimes occur. This is the same during surgical weight loss procedures including the gastric sleeve. The complications can include:

  • Haemorrhage (bleeding)
  • Leaks from staple lines in stomach
  • Adverse reactions to anaesthetic or medicines
  • Deep vein thrombosis / pulmonary embolus
  • Infections
  • Marginal ulcers
  • Respiratory problems (lungs)
  • Death
  • Other complications

Other considerations:

  • Long staple line – risk of leakage and/or haemorrhage (1-2%)
  • Wider variation in the resulting weight loss – not as predictable as the gastric bypass
  • Wider variation in long term weight loss – less data available on how weight loss will develop over a longer period of time
  • Increase risk of GERD – Gastroesophageal reflux disease
  • Increased risk of Barretts Oesphagus

The known overall rate of early complications for this procedure globally is 3-10%. The known mortality rate of this surgery globally is 0.5% (however at Pall Mall Bariatrics, we maintain a 0% of mortality across all surgeries).

A gastric sleeve has a higher risk of complications to the gastric band  and gastric balloon procedures.

Our surgeon performing the Gastric Sleeve procedure is Mr Alan Li, who has specialist experience and is an established expert in bariatric weight-loss.

  • Oesophgeal and Gastric Cancer (Oncology)
  • Upper Gastro-Intestinal Disorders
  • GERD – reflux, heartburn and hiatus hernia
  • General surgery (hernia and gallbladder disease)

Recent advances within his practice for weight loss include:

  • Laparoscopic keyhole techniques
  • Minimally invasive surgery for Cancer
  • ESG for obesity (endoscopic sleeve gastroplasty)
    • (non surgical sleeve)
  • 365 balloon for weight loss
  • Minimal scar and single incision (SILS) surgery
  • Robotic surgery

View his website biography page here.

Following the post surgical dietary plan, you will be able to eat normal foods. These will just be in much smaller quantities such as 3-6 tablespoons of food per meal.

You will need to avoid fatty and sugary foods if you wish to achieve your weight loss goal, therefore an improved diet that is balanced in food types.

You will need to take a daily vitamin and mineral supplement – evidence shows weight loss patients can become deficient given sudden changes in diet.

To be successful, you will need to be physically active. The aim will be to walk at least 60 mins/day or equivalent physical activity.

Pall Mall Bariatrics offers a fully comprehensive aftercare programme. This runs for 2 years after your gastric sleeve surgery with an ‘open door’ policy. This means you will be able to access unlimited support through telephone calls or appointments at clinic should you have a problem or need any extra advice.

We have a structured programme of post-operative follow-up calls with our Bariatric Nurse (Claire Clarke) starting from 3 days post surgery.

We also have a schedule of review appointments at clinic:

  • 2 weeks
  • 3 months
  • 6 months
  • 12 months
  • 18 months
  • 24 months

Bariatric Toolkit:

We are uniquely placed to offer all patients access to our post-operative toolkit of optional services that will support you in a private and confidential environment including:

  • Blood testing (benchmarking your levels pre and post surgery)
  • Imaging (scanning for reduction in disease risk over time)
  • Consultant Nutritionist for expert support and dietary planning
  • Consultant Psychologist for expert support for mental health
  • Access to counsellors for expert support for coping with lifestyle change
  • Access to vitamin and mineral clinics – wellbeing boosts with B12 injections and other vitamins and minerals by intravenous therapy
  • Access to a network of dietary support in relation to meal recipes, dietary advice and places to eat that will support you post surgery
  • Access to sports therapist who can introduce you to physical exercise suitable for your daily lifestyle
  • Access to free appointments with our Consultant Plastic Surgeon for expert options about a tummy tuck or surgery to remove excess skin following weight loss
  • Fluoroscopic Examination – through Barium Swallow testing at our on-site imaging & diagnostic centre