Dr Siddhartha Bhattacharya

Sleeve Gastrectomy (Gastric Sleeve) Sleeve gastrectomy, often called the Gastric Sleeve, is a permanent weight-loss surgery that involves removing approximately 75–80% of the stomach. The remaining portion is joined together to form a narrow tube or "sleeve" about the size and shape of a banana. This procedure provides a powerful tool for long-term weight management by physically and hormonally changing how the body processes hunger and food intake. How It Works Physical Restriction: The significantly smaller stomach capacity limits the amount of food you can eat at one time, making you feel full much faster. Hormonal Changes: By removing the upper portion of the stomach (the fundus), the surgery drastically reduces the production of Ghrelin, known as the "hunger hormone." Appetite Suppression: The reduction in Ghrelin leads to a decreased appetite and significantly improved blood sugar control. Natural Digestion: Unlike a gastric bypass, the intestines are not re-routed, meaning the natural digestion process remains largely intact. When You Should Consider a Sleeve Gastrectomy Body Mass Index (BMI): Typically recommended for individuals with a BMI of 40 or higher, or a BMI of 35 or higher with obesity-related health conditions. Type 2 Diabetes: If you are struggling to manage blood sugar levels through diet and medication alone. Hypertension: When high blood pressure persists despite medical intervention and lifestyle changes. Obstructive Sleep Apnea: If excess weight is causing significant breathing interruptions during sleep. Failed Weight Loss Efforts: For those who have been unable to achieve sustained weight loss through traditional diet and exercise programs. How Is Performed Anesthesia: The surgery is performed under general anesthesia and typically takes between 60 to 90 minutes. Laparoscopic Approach: This is a minimally invasive "keyhole" surgery where the surgeon makes 4–5 small incisions in the abdomen to insert a camera and specialized instruments. The Resection: The surgeon uses a surgical stapler to divide the stomach vertically, removing the outer curved portion of the organ. Staple Line Reinforcement: The edges of the new stomach sleeve are securely stapled to ensure a watertight and airtight seal. No Re-routing: The connection between the stomach and the small intestine is preserved, allowing for normal nutrient absorption. Pre-Procedure Preparation Nutritional Counseling: Working with a dietitian to understand the strict dietary phases required before and after surgery. Psychological Evaluation: To ensure you have a strong support system and a clear understanding of the lifelong lifestyle changes required. Medical Screening: A comprehensive review of heart and lung health to ensure you are a safe candidate for general anesthesia. Pre-Op Liquid Diet: Most patients must follow a specific high-protein, low-calorie liquid diet for 1–2 weeks before surgery to shrink the liver. Smoking Cessation: You must stop smoking at least 6 weeks before surgery to reduce the risk of staple line leaks and breathing complications. Tests Before Sleeve Gastrectomy Upper Endoscopy (EGD): To check the health of the stomach lining and rule out significant hiatal hernias or ulcers. Abdominal Ultrasound: Specifically used to check for gallstones, which can be affected by rapid weight loss. Blood Panels: Comprehensive testing of vitamin levels, blood sugar (HbA1c), and kidney function. Sleep Study: To identify and treat undiagnosed sleep apnea prior to the administration of anesthesia. Life After Sleeve Gastrectomy Hospital Stay: Most patients remain in the hospital for 1 to 2 nights for monitoring and pain management. Strict Dietary Phases: You must follow a multi-phase transition to allow the staple line to heal: Weeks 1–2: Clear liquids only. Weeks 3–4: Pureed and soft foods. Week 5+: Gradual introduction of solid, high-protein foods. Lifelong Supplements: You must take daily vitamin and mineral supplements forever to prevent nutritional deficiencies. Activity Restrictions: Most people return to work within 2 weeks but must avoid heavy lifting or core-straining exercise for a full 6 weeks. Small Meals: You will transition to eating small, nutrient-dense meals throughout the day, as the stomach can no longer hold large volumes. Why Specialized Treatment Is Highly Effective Substantial Weight Loss: Most patients lose 60–70% of their excess body weight within the first 12–18 months. Disease Resolution: The procedure can significantly improve or even resolve conditions like Type 2 diabetes, high blood pressure, and fatty liver disease. Increased Longevity: By reducing the strain of obesity on the heart and joints, the surgery contributes to a longer, more active life. Minimally Invasive: The laparoscopic technique results in less pain, smaller scars, and a much faster recovery than traditional open surgery. Simpler Mechanism: Because the intestines are not re-routed, there is a lower risk of long-term malabsorption or "dumping syndrome" compared to other weight-loss surgeries.

Roux-en-Y Gastric Bypass (RYGB) Roux-en-Y Gastric Bypass (RYGB) is considered the "gold standard" of weight-loss surgery. It is a complex, permanent procedure that involves creating a small stomach pouch and rerouting the small intestine to change how your body absorbs calories and nutrients. How It Works Restriction: The new stomach pouch is roughly the size of an egg (about 30ml), which drastically limits how much you can eat. Malabsorption: By bypassing the first part of the small intestine, your body absorbs fewer calories and fats from the food you consume. Hormonal Shifts: The surgery alters gut hormones (like GLP-1 and PYY) that suppress hunger, increase satiety, and rapidly improve blood sugar levels. When You Should Consider a Gastric Bypass Severe Obesity: Typically for individuals with a BMI of 40 or higher, or a BMI of 35 with serious weight-related health problems. Type 2 Diabetes: When rapid and significant improvement in blood sugar control is a primary medical goal. Chronic GERD: For patients with severe acid reflux that may be worsened by other types of weight-loss surgery. Metabolic Syndrome: When a combination of high blood pressure, high blood sugar, and abnormal cholesterol levels requires a powerful intervention. Failed Weight Loss: For those who have not achieved sufficient results through diet, exercise, or other non-surgical methods. How Is Performed Anesthesia: The surgery is performed under general anesthesia and typically takes 2 to 3 hours. Laparoscopic Approach: Most procedures are performed using minimally invasive techniques, involving several small incisions in the abdomen for a camera and specialized tools. Creating the Pouch: The surgeon staples the top section of the stomach to separate it from the rest, creating a small, functional pouch. The "Roux" Limb: The small intestine is divided; the bottom end is lifted up and connected directly to the new small stomach pouch. The Reconnection: The remaining part of the small intestine (still attached to the "old" stomach) is reconnected further down the "Roux" limb so that digestive juices can eventually mix with food. Pre-Procedure Preparation Nutritional Counseling: Extensive education on the strict dietary phases and lifelong eating habits required after surgery. Psychological Clearance: To ensure you are emotionally prepared for the significant lifestyle changes and body image transitions. Medical Screening: Comprehensive heart, lung, and gastrointestinal evaluations to minimize surgical risks. Pre-Op Liquid Diet: A specialized diet for 1–2 weeks prior to surgery to reduce liver size and make the procedure safer. Smoking Cessation: Patients must stop smoking at least 6 weeks before surgery to reduce the risk of ulcers and healing complications. Tests Before Gastric Bypass Upper Endoscopy (EGD): To examine the stomach lining and check for hiatal hernias or ulcers. Blood Panels: Detailed testing for baseline vitamin and mineral levels, as well as kidney and liver function. Sleep Study: To detect and treat obstructive sleep apnea, which is common in bariatric patients. Cardiology Clearance: Including an EKG or stress test to ensure the heart can handle general anesthesia. Life After Gastric Bypass Hospital Stay: Usually involves 2 nights for observation and initial recovery. Post-Op Diet Progression: A strict transition from clear liquids (weeks 1–2) to pureed foods (weeks 3–4) and finally soft solids. Dumping Syndrome: A unique side effect where sugary or high-fat foods cause rapid heart rate, nausea, and sweating as food "dumps" too quickly into the small intestine. Lifelong Supplements: Due to malabsorption, you must take daily multivitamins, calcium, B12, and iron for the rest of your life. Activity Restrictions: Most patients return to work in 2 weeks but must avoid heavy lifting for 6 weeks to allow internal reconnections to heal. Why Specialized Treatment Is Highly Effective Significant Weight Loss: Patients typically lose 60% to 80% of their excess body weight within 12 to 18 months. Diabetes Remission: Exceptionally effective at treating Type 2 diabetes, often leading to normal blood sugar levels within days of surgery. Reflux Relief: Unlike some other procedures, a gastric bypass often cures chronic acid reflux (GERD). Long-Term Health Benefits: Dramatically reduces the risk of stroke, heart disease, and several types of cancer. Comprehensive Metabolic Control: Provides a multi-layered approach by combining physical restriction, malabsorption, and beneficial hormonal changes.

Mini Gastric Bypass (MGB / OAGB) The Mini Gastric Bypass (MGB), also known as One-Anastomosis Gastric Bypass (OAGB), is a simplified, minimally invasive version of the traditional Roux-en-Y gastric bypass. It is considered both a restrictive and malabsorptive procedure, meaning it reduces the amount of food you can eat and limits the calories your body absorbs. When You Should Consider a Mini Gastric Bypass High BMI: Typically recommended for individuals with a Body Mass Index (BMI) of 40 or higher, or 35 with obesity-related health conditions. Type 2 Diabetes: For patients seeking rapid and significant improvement in blood sugar control through metabolic surgery. Hypertension: When high blood pressure persists despite medical intervention and significant weight gain. Obstructive Sleep Apnea: If excess weight is causing breathing interruptions during sleep that impact daily energy and heart health. Need for Shorter Surgery: For patients where a shorter operative time is preferred over the more complex traditional bypass. How Is Performed Anesthesia: The surgery is performed under general anesthesia and typically takes between 60 to 90 minutes. Laparoscopic Approach: This is a "keyhole" surgery where the surgeon makes small incisions in the abdomen to insert a camera and specialized surgical instruments. Creation of the Pouch: The surgeon staples the upper part of the stomach into a long, narrow tube (roughly the size of a banana) that holds about 30–50 ml of food. Single Anastomosis (The Join): Unlike the two connections required in traditional bypass, the surgeon makes only one connection. A loop of the small intestine is brought up and attached directly to the new stomach pouch. The Bypass: Approximately 150 to 200 cm of the small intestine is bypassed, redirecting food away from the area where most calories and fats are typically absorbed. Pre-Procedure Preparation Nutritional Counseling: Working with a specialist to understand the strict dietary phases and the importance of lifelong protein intake. Psychological Evaluation: To ensure readiness for the significant lifestyle changes and dietary restrictions following surgery. Medical Screening: A comprehensive review of cardiovascular and respiratory health to ensure safety during general anesthesia. Pre-Op Liquid Diet: Most patients follow a high-protein, low-calorie liquid diet for 1–2 weeks before surgery to reduce liver size. Smoking Cessation: You must stop smoking at least 6 weeks before surgery to minimize the risk of ulcers and complications at the surgical join. Tests Before Mini Gastric Bypass Upper Endoscopy (EGD): To examine the stomach lining and check for hiatal hernias, ulcers, or evidence of significant acid reflux. Abdominal Ultrasound: Primarily used to check for gallstones, which can be affected by rapid weight loss. Blood Panels: Comprehensive testing for baseline vitamin levels (B12, Iron, Vitamin D) and kidney/liver function. Sleep Study: To identify and treat undiagnosed sleep apnea before the administration of anesthesia. ECG: A standard heart check to ensure cardiac stability for the duration of the procedure. Life After Mini Gastric Bypass Hospital Stay: Most patients stay in the hospital for 1 to 2 nights for observation and pain management. Staged Diet Progression: To allow the new joins to heal, patients follow a strict multi-phase plan: Days 1–3: Clear liquids only (water, broth). Week 2: Full liquids (protein shakes, thin soups). Weeks 3–4: Pureed foods (mashed vegetables, soft eggs). Week 5+: Gradual introduction of soft solids, moving toward regular healthy food. Lifelong Supplements: Due to malabsorption, you must take daily multivitamins, calcium, B12, and iron for the rest of your life. Activity Restrictions: Most patients return to work within 2 to 3 weeks but must avoid heavy lifting for 6 weeks to protect the internal staples. Why Specialized Treatment Is Highly Effective Significant Weight Loss: Patients often lose 60% to 75% of their excess body weight within the first year of surgery. Metabolic Improvement: Highly effective at resolving or improving Type 2 diabetes, high blood pressure, and sleep apnea. Technically Simpler: Having only one surgical join reduces operative time and lowers the risk of certain complications like internal hernias. Potentially Reversible: Because no part of the stomach is removed from the body, the procedure is potentially reversible if ever medically necessary. Durable Results: Combines the benefits of a smaller stomach with reduced calorie absorption for long-term weight maintenance and health.

Revisional Bariatric Surgery Revisional bariatric surgery is a specialized procedure performed on patients who have already undergone a primary weight-loss surgery but require a second operation. This may be due to medical complications, insufficient weight loss, or significant weight regain. Because of existing scar tissue and altered anatomy, these procedures are more complex and carry higher risks than initial weight-loss surgeries. When You Should Consider Revisional Surgery Inadequate Weight Loss or Regain: If the initial stomach pouch has stretched over time or the body has adapted to the metabolic changes of the first surgery. Severe Acid Reflux (GERD): Persistent or worsening reflux that does not respond to medication, frequently occurring after a gastric sleeve procedure. Mechanical Complications: Issues such as a "slipped" gastric band, a staple line leak, or a narrowing (stricture) of a previous surgical connection. Chronic Ulcers or "Dumping Syndrome": Persistent digestive issues following a bypass that cannot be managed through dietary changes alone. Nutritional Malabsorption: Severe deficiencies in vitamins or protein that remain uncontrolled despite high-dose supplementation. Common Revisional Procedures Sleeve to Bypass Conversion: Converting a gastric sleeve into a Roux-en-Y gastric bypass. This is highly effective for treating severe reflux and triggering further weight loss. Gastric Band Conversion: Removing a "Lap-Band" and converting the anatomy into either a sleeve or a bypass, often performed in a single or two-stage process. Bypass Revision (Stoma Tightening): For a stretched gastric bypass, a surgeon may "re-tighten" the connection (stoma) to restore the feeling of fullness. Intestinal Lengthening: Adjusting the "Roux" limb to increase the bypassed section of the intestine, thereby increasing calorie malabsorption. Sleeve Re-Sleeving: Trimming a previously stretched gastric sleeve to restore its original narrow, restrictive shape. How Is Performed Anesthesia: The surgery is performed under general anesthesia and typically takes between 2 to 4 hours due to the precision required. Surgical Approach: Almost always performed laparoscopically or robotically to navigate through previous scar tissue with high-definition visualization and accuracy. Managing Adhesions: The surgeon must carefully separate internal scarring (adhesions) from previous operations before the new revision can begin. Stapling and Joins: New surgical joins are created using specialized stapling instruments designed for thicker or scarred tissue. Leak Testing: Extensive intra-operative testing is performed to ensure all new connections are watertight and airtight before finishing. Pre-Procedure Preparation Anatomy Mapping: Extensive imaging is required to visualize the current state of the stomach and intestines before entering the operating room. Nutritional Optimization: Correcting any existing vitamin deficiencies through intensive supplementation prior to surgery. Psychological Assessment: A thorough review to ensure the patient is prepared for the "reset" in dietary habits and lifestyle expectations. Smoking Cessation: Patients must stop smoking at least 6 to 8 weeks before surgery, as nicotine significantly increases the risk of staple line leaks in scarred tissue. Weight Management: Following a specific pre-operative diet to reduce liver size and improve surgical access. Tests Before Revisional Surgery Upper Endoscopy (EGD): Inserting a camera into the stomach to inspect the pouch and check for ulcers, inflammation, or stretching. Barium Swallow (UGI Series): A specialized X-ray where the patient swallows contrast liquid to show the exact size and flow of the current anatomy. Abdominal CT Scan: To provide a 3D view of the internal organs and identify any hidden hernias or mechanical issues. Comprehensive Blood Panels: Detailed analysis of iron, B12, Vitamin D, and protein levels to establish a baseline. Life After Revisional Surgery Hospital Stay: Usually involves 2 to 3 nights of close monitoring to ensure the new surgical joins are healing correctly. Dietary Reset: Patients must return to a "Phase 1" clear liquid diet and progress slowly through pureed and soft foods over a 4–6 week period. Slower Weight Loss: It is important to note that weight loss after a revision is typically slower and less dramatic than after the first surgery. Lifelong Monitoring: Regular follow-up appointments and blood tests are essential to monitor for malabsorption and nutritional health. Activity Restrictions: Light walking is encouraged immediately, but heavy lifting and core-straining exercises are restricted for 6 weeks. Why Specialized Treatment Is Highly Effective Resolves Chronic Pain and Reflux: Provides immediate relief for patients suffering from the mechanical failures or side effects of a primary surgery. Second Chance for Health: Allows patients who did not reach their goals to restart their weight-loss journey with a more powerful metabolic tool. Precision Technology: The use of robotic platforms allows surgeons to operate safely in "hostile" abdomens filled with previous scar tissue. Customized Anatomy: Every revision is tailored specifically to the patient’s existing anatomy, ensuring the most effective solution for their unique situation. Prevents Long-Term Damage: Addressing issues like chronic ulcers or severe reflux prevents permanent damage to the esophagus and digestive tract.