01
Sustained Weight Loss
Helps reduce excess body weight and supports long-term weight management.
Patient Information
Bariatric & Metabolic Surgery
Bariatric and metabolic surgery is an established treatment for obesity and obesity-related diseases. These procedures can help achieve sustained weight loss and improve metabolic health when combined with long-term medical care.
Depending on the procedure, surgery reduces stomach capacity and changes digestive and gut-hormone signals that influence hunger, fullness and blood sugar control.
A long-term approach to better health
Surgery is not a quick fix. Healthy eating, physical activity, nutritional supplements and lifelong medical follow-up are essential for lasting results.
01 / Introduction
Understanding Bariatric & Metabolic Surgery
Bariatric surgery can produce substantial weight loss and may significantly improve conditions such as type 2 diabetes, high blood pressure, sleep apnea, fatty liver disease and abnormal cholesterol levels.
02
Metabolic Improvement
May improve blood sugar control and other obesity-related metabolic conditions.
03
Comprehensive Care
Combines surgical treatment with nutrition, lifestyle changes and continued medical support.
02 / Patient Eligibility
BMI 35 or above
BMI 30–34.9
BMI 27.5–29.9
Who May Benefit From Bariatric Surgery?
Obesity is a chronic disease. Eligibility depends on BMI, obesity-related medical conditions, previous treatment attempts and overall health. Asian Indian populations may develop metabolic complications at lower BMI levels.
Higher BMI
Surgery may be recommended for appropriately selected patients, even without associated medical conditions.
Metabolic Disease
Surgery may be considered when significant obesity-related metabolic disease remains inadequately controlled with non-surgical treatment.
Selected Patients
Metabolic surgery may be considered in carefully selected patients, particularly with inadequately controlled type 2 diabetes or serious metabolic disease.
Important:
BMI thresholds and eligibility must be interpreted using
applicable Indian clinical guidance. The final decision
requires individualized assessment by a multidisciplinary
bariatric team.
03 / Before Surgery
Preoperative Evaluation
A comprehensive assessment helps determine whether surgery is appropriate and which procedure best suits the patient's health needs.
Medical & Laboratory Assessment
- Medical assessment: Evaluation of obesity, diabetes, blood pressure, sleep apnea, liver disease and other conditions.
- Blood tests: Blood sugar, liver and kidney function, blood counts, lipid profile, thyroid function and nutritional status.
- Nutritional assessment: Review of eating habits and nutritional deficiencies.
- Psychological assessment: Readiness for long-term lifestyle changes and behavioural support needs.
Additional Investigations
- Gastrointestinal evaluation: Endoscopy or other investigations when indicated.
- Cardiac and respiratory evaluation: ECG, chest imaging or specialist assessment when required.
- Preoperative diet: A weight-loss diet may be advised in selected patients to reduce liver size and improve operative safety.
04 / Treatment Options
Types of Bariatric & Metabolic Surgery
Procedure selection depends on BMI, diabetes, acid reflux, eating patterns, previous surgery and other individual factors. Each option has specific benefits and potential risks.
Sleeve Gastrectomy
Approximately 70–80% of the stomach is removed, leaving a narrow gastric tube.
Potential benefits- Reduces stomach capacity.
- May reduce hunger through hormonal effects.
- Can provide effective weight loss.
- Does not involve an intestinal bypass.
Important consideration: Acid reflux may develop or worsen in some patients.
Roux-en-Y Gastric Bypass
A small stomach pouch is created and connected to the small intestine, bypassing part of the upper intestine.
This procedure can produce significant weight loss and has strong metabolic effects, particularly for type 2 diabetes.
One-Anastomosis Gastric Bypass (OAGB)
Also known as Mini Gastric Bypass, this procedure creates a small stomach pouch and connects it to the small intestine through a single gastrointestinal anastomosis.
It can provide substantial weight loss and metabolic improvement but requires lifelong nutritional monitoring.
Choosing the right procedure:
The expected benefits, limitations, nutritional requirements
and potential complications should be discussed with the
bariatric surgeon before making a decision.
05 / Expected Outcomes
Expected Weight Loss
Weight loss varies considerably between individuals. Outcomes depend on the type of procedure, starting weight and BMI, eating habits, physical activity, metabolic factors and long-term adherence to follow-up.
Bariatric surgery generally produces greater and more
durable weight loss than lifestyle treatment alone, but
no specific amount of weight loss can be guaranteed.
Health Benefits
In addition to weight reduction, metabolic surgery may improve or sometimes lead to remission of obesity-related conditions.
Type 2 Diabetes
May improve blood sugar control and, in some patients, lead to remission.
Heart & Metabolic Health
May improve high blood pressure, abnormal cholesterol and metabolic syndrome.
Sleep & Liver Health
May improve obstructive sleep apnea and fatty liver disease.
Joint Health
Reduced body weight may help ease joint-related problems.
The degree of improvement varies from person to person.
06 / Safety Information
Possible Risks & Complications
Like any major operation, bariatric surgery carries risks. The type and likelihood of complications depend on the procedure and individual patient factors.
Early Complications
- Bleeding.
- Infection.
- Blood clots.
- Anaesthetic complications.
- Leakage from the stomach or intestinal connection.
- Blood clots affecting the lungs.
Long-Term Problems
- Vitamin and mineral deficiencies.
- Anaemia.
- Gallstones after rapid weight loss.
- Dumping syndrome, particularly after gastric bypass.
- Acid reflux or bile reflux in selected patients.
- Ulcers or narrowing at the surgical connection.
- Weight regain.
07 / Long-Term Care
Life After Bariatric Surgery
Surgery is the beginning of a long-term weight-management journey. Consistent lifestyle changes and regular medical monitoring help support recovery and long-term results.
01. Follow Your Diet
Follow the prescribed staged diet, eat slowly, chew thoroughly and maintain adequate protein intake.
02. Stay Active
Exercise regularly and gradually increase activity according to your surgeon's advice.
03. Take Supplements
Take prescribed vitamins and minerals to help prevent nutritional deficiencies.
04. Attend Follow-Ups
Attend scheduled appointments and have periodic blood tests to monitor nutritional status.
Lifelong follow-up is recommended.
Nutritional supplementation and monitoring depend on the
procedure, individual needs and blood-test results.
08 / Patient Questions
Frequently Asked Questions
Answers to common questions about bariatric and metabolic surgery.
Bariatric surgery is an established treatment for obesity and is generally safe when performed in appropriately selected patients by an experienced multidisciplinary team. However, every operation has potential risks.
Not necessarily. Weight loss varies between individuals and procedures. The goal is meaningful, sustained weight reduction and improvement in obesity-related diseases.
Yes. Metabolic surgery can substantially improve type 2 diabetes and may lead to remission in some patients. Outcomes depend on diabetes duration, pancreatic function, medications and the type of surgery.
Some patients can reduce or stop medicines for diabetes, blood pressure or other conditions. Medication changes must always be made under medical supervision.
Yes. Long-term vitamin and mineral supplementation is essential. Depending on the procedure and blood-test results, supplements may include a multivitamin, iron, calcium, vitamin D and vitamin B12.
Some weight regain can occur. Healthy eating, physical activity, regular follow-up and medication when required can help support long-term results. Additional treatment, including medication or revisional surgery, may occasionally be considered.
Hospital stay varies according to the procedure, recovery and individual health. Many patients undergoing uncomplicated laparoscopic surgery can go home within a few days.
Recovery varies. Light activity is generally encouraged early, while strenuous activity should be resumed gradually according to the surgeon's advice.
Yes. Fertility may improve after weight loss. Pregnancy is generally advised to be postponed for 12–18 months after surgery so weight and nutritional status can stabilize. Discuss pregnancy planning with your treating team.
It depends on the procedure. Sleeve gastrectomy involves permanent removal of part of the stomach. Some other procedures may be revised or converted in selected circumstances. Further surgery is considered only when medically indicated.
No. It is also called metabolic surgery because its benefits may extend beyond weight reduction to improvements in type 2 diabetes and other obesity-related metabolic diseases.
Your Health Journey
A Lifelong Approach to Better Health
Bariatric and metabolic surgery is one component of comprehensive obesity treatment. The best outcomes are achieved when surgery is combined with nutritional guidance, physical activity, behavioural support and long-term medical follow-up.
Every patient is different. The most appropriate procedure should be selected after a detailed evaluation and discussion with the bariatric team.
This information is for educational purposes and does not replace an individual medical consultation. Eligibility, treatment choices and expected outcomes should be confirmed with a qualified bariatric surgeon.