Procedure guide · Bariatric and metabolic surgery
Sleeve gastrectomy is weight loss surgery that removes most of the stomach and leaves a narrow, sleeve-shaped tube. The NIDDK notes that it cannot be reversed. It is usually done by keyhole surgery under general anaesthetic. Lifelong changes to eating, supplements and follow-up are part of the treatment, not optional extras.
What is a sleeve gastrectomy?
The NHS describes small cuts in the abdomen through which the surgeon removes a large part of the stomach. The NIDDK says the remaining banana-shaped section is closed with staples. It holds less food, so you feel full sooner. Removing part of the stomach may also change gut hormones that affect appetite.
The NIDDK lists points to weigh. The sleeve does not reroute the intestine and leaves no implanted device. But it is permanent. It also carries risks of vitamin and iron deficiency, acid reflux and hiatus hernia. The NHS lists a stomach leak and a narrowing or blockage as possible complications. Blood clots, gallstones and wound infection can follow any weight loss surgery.
Who may be suitable?
The NHS says surgery may be considered with a BMI of 40 or more. It may also be considered with a BMI between 35 and 40 and a condition that could improve with weight loss, such as diabetes or high blood pressure. For people of South Asian, Middle Eastern, Black African and some other backgrounds, it may be considered at a lower BMI. You must agree to lifestyle changes and regular check-ups. The bariatric team decides which operation, if any, suits you.
Which reports does a bariatric team usually ask for?
The NHS explains that the team checks physical health with blood and urine tests, X-rays and scans. It assesses eating patterns, past weight loss attempts and mental wellbeing. Before travel, send your height, weight and BMI. Send recent blood tests including blood sugar and a list of medicines. Include reports on diabetes, heart, lung or sleep problems. Mention any reflux symptoms, as these matter for the sleeve.
Supplements and check-ups for life
The NHS says you will need vitamin and mineral supplements and follow-up appointments for the rest of your life. Before you book, find a doctor at home who will monitor your blood tests.
How do you plan the trip?
The stages are a records review, assessment in India and surgery. A period of monitoring and the start of the staged diet follow. The NHS describes moving from clear fluids to runny, then soft, then normal foods. A dietitian guides you through it. Travel with an attendant. Ask the team for a written diet plan and a supplement plan for home. Ask also how you can reach the dietitian after you leave. Your surgeon decides when it is safe to fly.
What should you ask the hospital?
- Why do you suggest a sleeve rather than a bypass for me?
- Does my reflux history affect the choice?
- Which tests will you do before deciding?
- Which supplements will I need, and can I buy them at home?
- How will the dietitian support me after I return?
- What symptoms after discharge need urgent attention?
Questions people ask
Can a sleeve gastrectomy be reversed?
No. The NIDDK says it cannot be reversed because part of the stomach is permanently removed. Think carefully and discuss other options with the bariatric team before you agree to surgery.
Will I need vitamins after a sleeve gastrectomy?
Yes. The NHS says you should take vitamin and mineral supplements and have regular blood tests. The NIDDK notes a risk of vitamin and iron deficiency after the sleeve. Your team will prescribe the right supplements.
Is there a sleeve option without surgery?
The NHS describes endoscopic sleeve gastroplasty. A tube with a camera and stitching device is passed through the mouth and folds the stomach to make it smaller. No cuts are made and it may be possible to reverse it. A specialist decides whether it suits you.
Sources
- NHS: Weight loss surgery – how it’s done
- NHS: Weight loss surgery – why it’s done
- NHS: Weight loss surgery – recovering
- NIDDK: Types of weight-loss surgery
General information, not medical or legal advice. Rules change: confirm with the official source. Your treating specialist decides on suitability, treatment and length of stay. How we write and check.