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Living with obesity is about much more than the number you see on a weighing scale. Excess body weight can gradually affect your mobility, sleep, energy levels, metabolic health and overall quality of life. It may also be associated with health conditions such as type 2 diabetes, high blood pressure, sleep apnoea, joint problems and abnormal cholesterol levels.
For some people, changes in diet, physical activity, behavioural support and medical treatment can help achieve meaningful weight loss. For others, particularly when obesity is severe or accompanied by obesity-related health problems, bariatric surgery may be considered as part of a medically supervised weight-management plan.
If you are considering bariatric surgery in Chennai, Dr Kumar at Billroth Hospitals provides surgical evaluation with an emphasis on appropriate patient selection, clear counselling and personalised treatment planning.
Dr Kumar is an Advanced Laparoscopic and Robotic Surgeon with more than 29 years of surgical experience. His qualifications include MS General Surgery, MRCS England and FALS Bariatric, Fellowship in Advanced Laparoscopic Surgery – Bariatric, along with additional fellowships in minimally invasive, colorectal, hernia and robotic surgery.
Obesity is a chronic and complex health condition involving excessive accumulation of body fat that may adversely affect health.
It does not develop simply because of a lack of willpower. Genetics, metabolism, hormonal factors, lifestyle, sleep, medications, psychological factors, eating patterns and the surrounding environment can all influence body weight.
One commonly used measurement is Body Mass Index or BMI.
BMI is calculated by dividing weight in kilograms by height in metres squared. While BMI does not provide a complete picture of an individual’s health, it is one of several factors doctors use when evaluating obesity and considering treatment options.
Treatment should therefore be based on the individual rather than BMI alone.
Obesity can place additional stress on multiple systems of the body.
Over time, people living with obesity may have an increased likelihood of developing metabolic and mechanical health problems, including type 2 diabetes, hypertension, obstructive sleep apnoea, fatty liver disease, joint pain and mobility limitations.
It can also interfere with everyday activities. Walking longer distances, climbing stairs, sleeping comfortably and participating in exercise may become difficult.
Managing obesity is therefore not simply about appearance. The primary objective should be better health, mobility, metabolic control and long-term quality of life.
Bariatric surgery, also called weight loss surgery or metabolic and bariatric surgery, refers to operations that modify the digestive system to support substantial and sustained weight loss.
Depending on the operation, surgery may reduce the amount of food the stomach can hold and can also influence appetite, digestion and metabolic processes.
Bariatric surgery should not be viewed as an effortless shortcut to losing weight. It is a medical treatment that requires careful evaluation before surgery and significant long-term commitment afterwards.
Healthy eating habits, nutritional monitoring, physical activity and regular medical follow-up remain important after the operation.
There is no single number that determines whether someone should undergo weight loss surgery.
International metabolic and bariatric surgery guidelines have evolved significantly, and BMI criteria can vary according to the individual, associated metabolic disease and population. Asian populations may also require different BMI considerations than Western populations.
In practice, bariatric surgery may be discussed when obesity is significantly affecting health, when substantial or durable weight loss has not been achieved through appropriate non-surgical treatment, or when obesity-related diseases warrant consideration of metabolic surgery.
A surgeon must evaluate each patient individually before recommending an operation.
BMI and weight history
Your current weight is considered alongside how your weight has changed over time.
Existing health conditions
Diabetes, hypertension, sleep apnoea, fatty liver disease and other obesity-related problems may influence treatment decisions.
Previous weight-loss efforts
Your doctor may discuss previous dietary, lifestyle, medical or supervised weight-management programmes.
Readiness for long-term change
Bariatric surgery requires changes in eating behaviour, nutrition, activity and follow-up.
Overall surgical fitness
Medical investigations are necessary to determine whether surgery can be undertaken safely.
An online BMI calculator or general guideline cannot determine whether bariatric surgery is appropriate for you. A clinical evaluation is necessary.
There are several forms of weight loss surgery. The right procedure depends on the patient’s BMI, medical conditions, eating patterns, previous abdominal surgery, reflux symptoms and individual health considerations.
Sleeve gastrectomy, sometimes called gastric sleeve surgery, is one of the commonly used bariatric procedures.
During the operation, a substantial portion of the stomach is removed, leaving a narrower sleeve-shaped stomach.
The smaller stomach limits the quantity of food that can be consumed at one time. Changes following sleeve surgery can also affect mechanisms involved in hunger and appetite.
Because part of the stomach is permanently removed, sleeve gastrectomy is not considered reversible.
Patients considering sleeve gastrectomy in Chennai should discuss expected benefits, nutritional requirements, reflux considerations and possible complications with their surgeon before making a decision.
A gastric bypass creates a small stomach pouch and changes the pathway through which food travels within part of the digestive system.
This can reduce food intake and alter absorption and metabolic signalling.
Gastric bypass may be appropriate for selected patients, but it requires careful long-term nutritional monitoring.
The decision between gastric bypass, sleeve gastrectomy or another operation should never be based solely on which procedure appears to produce the greatest weight loss.
The most appropriate bariatric operation is the one that fits the individual’s medical condition and long-term needs.
This is one of the most common questions patients ask a bariatric surgeon in Chennai.
There is no universally “best” operation.
Sleeve gastrectomy and gastric bypass work differently and have different advantages, limitations and nutritional considerations.
The choice can depend on factors such as:
A detailed consultation allows these factors to be considered before a procedure is recommended.
Bariatric surgery is sometimes described as metabolic surgery because its effects can extend beyond body-weight reduction.
In appropriately selected patients, metabolic and bariatric surgery can improve obesity-associated health problems, including metabolic conditions such as type 2 diabetes.
However, outcomes differ between individuals. Surgery should not be presented as a guaranteed cure for diabetes.
Patients taking diabetes medications or insulin require coordinated monitoring before and after the procedure as weight loss and metabolic changes may affect their medication requirements.
Successful bariatric care begins before the day of surgery.
Dr Kumar and the treating medical team evaluate the patient’s health, medical history and suitability for the proposed procedure.
Depending on the individual, pre-operative assessment may include blood investigations, metabolic evaluation, cardiac or respiratory assessment, abdominal imaging, nutritional assessment and anaesthetic evaluation.
Existing medical conditions such as diabetes, hypertension or sleep apnoea may also need to be optimised before surgery.
Patients are counselled about what the operation involves, possible risks, dietary changes and what will be expected during recovery.
This preparation is important because bariatric surgery works best as part of a structured long-term treatment programme rather than as an isolated procedure.
Many bariatric procedures can be performed using minimally invasive laparoscopic surgery.
Rather than making one large abdominal incision, laparoscopic surgery generally uses several smaller incisions through which specialised instruments and a camera are introduced.
The appropriate surgical approach depends on the patient and the procedure being performed.
Dr Kumar has extensive experience in advanced laparoscopic surgery and has performed more than 20,000 laparoscopic procedures according to his professional profile at Billroth Hospitals.
He also holds FALS Bariatric, a Fellowship in Advanced Laparoscopic Surgery in Bariatric Surgery.
Recovery does not end when the patient leaves the hospital.
The digestive system needs time to adapt, and eating patterns are gradually modified under medical and nutritional guidance.
Patients generally progress through different stages of diet rather than immediately returning to ordinary meals.
Long-term care may include:
Specific recommendations depend on the operation and the patient’s individual health status.
There is no single amount of weight loss that every patient can expect.
Weight loss varies according to the type of bariatric procedure, starting BMI, metabolic health, diet, activity, adherence to follow-up and individual biological factors.
It is therefore more useful to discuss a realistic personalised weight-loss range with your surgeon than rely on before-and-after photographs or promises found online.
The broader objective is not simply to achieve a lower number on the scale. Improvement in metabolic health, mobility, daily activity and obesity-associated conditions may be equally important outcomes.
Yes. Weight regain can occur after bariatric surgery.
Surgery is a powerful treatment tool, but it does not permanently remove every biological, behavioural or environmental factor associated with obesity.
Long-term success therefore involves maintaining appropriate food choices, activity levels and follow-up.
If significant weight regain occurs, the reason should be evaluated rather than assumed to be a failure of the patient.
Eating behaviour, hormonal factors, medications, psychological health and anatomical factors may all need to be considered.
Every operation carries risks.
Potential complications of bariatric surgery vary according to the procedure and the patient’s underlying health. These can include bleeding, infection, blood clots, leakage from surgical connections or staple lines, nutritional deficiencies and other procedure-specific complications.
Some problems can occur shortly after surgery, while others can develop later.
This is why proper patient selection, an experienced surgical team, appropriate hospital facilities and structured follow-up are important.
During consultation, patients should be encouraged to discuss both the expected benefits and the possible risks of the recommended surgery before providing informed consent.
Recovery time varies between individuals and according to the operation performed.
Patients undergoing minimally invasive surgery may be encouraged to begin gentle movement relatively early, with activity progressively increased according to their surgeon’s recommendations.
Returning to work depends on the procedure, the type of work the individual performs and how recovery progresses.
Patients should avoid using another person’s recovery timeline as a guarantee for their own.
Dr Kumar provides individual post-operative guidance based on each patient’s surgery and clinical progress.
The cost of bariatric surgery in Chennai varies and cannot be accurately determined from the name of the procedure alone.
Factors influencing the overall cost may include:
the bariatric procedure selected, pre-operative investigations, hospital facilities and room category, anaesthesia, medical complexity, duration of hospitalisation, medications and post-operative requirements.
Sleeve gastrectomy, gastric bypass and other procedures may therefore have different overall costs.
Patients seeking an accurate estimate should first undergo a surgical assessment so that the appropriate procedure and required investigations can be identified.
Choosing bariatric treatment involves more than selecting an operation. Patients need a surgeon who can assess their medical condition, explain available options and determine whether surgery is appropriate at all.
Dr Kumar at Billroth Hospitals brings substantial experience in laparoscopic and gastrointestinal surgery to this evaluation.
29+ years of surgical experience
MS in General Surgery
MRCS, Royal College of Surgeons of England
FALS Bariatric – Fellowship in Advanced Laparoscopic Surgery, Bariatric
FALS Robotic
FALS Colorectal
FMAS – Fellowship in Minimal Access Surgery
20,000+ laparoscopic surgeries reported across his surgical practice
Most importantly, treatment planning should remain patient-specific. The objective of consultation is not simply to recommend surgery, but to determine the most suitable approach based on the patient’s health, risks and long-term goals.
If obesity is affecting your health and previous attempts at weight management have not produced durable results, you can discuss your options with an experienced surgeon.
A consultation can help determine whether non-surgical management, bariatric surgery or another treatment pathway is appropriate for you.
Discuss your BMI, obesity-related health concerns, previous weight-loss attempts and available bariatric treatment options in a personalised clinical consultation.
BMI is an important consideration, but it should not be used in isolation. Indian and international recommendations recognise different thresholds depending on metabolic disease, associated health conditions and Asian population characteristics. Your eligibility should therefore be determined through an individual medical and surgical evaluation.
There is no single bariatric operation that is best for every patient. Sleeve gastrectomy, gastric bypass and other procedures have different benefits and limitations. Your surgeon considers your BMI, metabolic health, reflux, eating patterns and other medical factors before recommending an option.
Sleeve gastrectomy involves removing a substantial portion of the stomach and is therefore considered a permanent, non-reversible anatomical procedure.
No. Bariatric surgery is also referred to as metabolic surgery because it can affect metabolic health and may improve several conditions associated with obesity in appropriately selected patients.
Bariatric surgery can improve metabolic control in some people with obesity and type 2 diabetes. The degree of improvement varies, however, and surgery should not be promoted as a guaranteed cure.
Recovery depends on the procedure, your health and the type of work or activity you perform. Your surgeon will provide an individual recovery and activity plan after surgery.
Weight loss varies considerably according to the operation, initial body weight, metabolic health and long-term adherence to dietary, activity and follow-up recommendations. Your surgeon can discuss realistic expectations during consultation.
Some degree of weight regain can occur. Long-term nutritional habits, physical activity and medical follow-up remain important even after successful surgery.
Diet is generally advanced gradually after surgery, beginning with stages appropriate for healing before transitioning towards long-term healthy eating. The exact plan should be prescribed by your bariatric and nutritional team.
The cost depends on the type of bariatric procedure, investigations, hospital requirements, medical complexity and length of stay. A personalised estimate can be provided after evaluation and procedure selection.
No. Bariatric surgery is only one component of obesity treatment. Some people may benefit from lifestyle intervention, nutritional treatment, medical weight management or combinations of these approaches instead. An appropriate clinical evaluation helps determine the right pathway.