What is Sleeve Gastrectomy?
Sleeve Gastrectomy is a minimally invasive procedure performed laparoscopically. During the surgery, approximately 80% of the stomach is removed, leaving a narrow, banana-shaped tube. This reduces the stomach’s capacity from around 2 litres to just 100-200 mL. The smaller stomach size helps patients feel full and satisfied after eating smaller portions, which supports sustainable weight loss.
How Does Sleeve Gastrectomy Work?
Sleeve Gastrectomy works in two key ways to promote weight loss:
- Restrictive Effect: By reducing the size of the stomach, the procedure limits the amount of food you can eat, helping you feel full sooner.
- Metabolic Effect: The surgery also impacts the body’s hormonal balance. The part of the stomach removed during the procedure (the fundus) produces a hormone called ghrelin, which stimulates hunger and fat storage. By removing this portion, ghrelin levels decrease, reducing hunger and helping the body regulate weight more effectively. However, it’s important to note that the metabolic effect of Sleeve Gastrectomy is weaker compared to gastric bypass, which may influence long-term weight loss outcomes.
Many experts consider Sleeve Gastrectomy a hybrid procedure, combining the benefits of both gastric bypass and gastric banding without some of the drawbacks associated with those surgeries.
What Results Can You Expect?
Most patients achieve significant weight loss within 12 months, losing approximately 60% of their excess weight. However, individual results may vary. Weight loss with Sleeve Gastrectomy is comparable to gastric bypass but often occurs more quickly. While long-term data is still being collected, the procedure has shown excellent outcomes for weight loss and improvement in obesity-related health conditions. That said, some patients may experience more weight regain in the long term compared to gastric bypass, as the metabolic effect of the sleeve is less pronounced.
Recovery and Life After Surgery
- Hospital Stay: Most patients stay in the hospital for 2 nights.
- Recovery Time: Nausea and chest discomfort (especially when drinking quickly) are common in the first few days but typically resolve within weeks as the body adjusts to the smaller stomach size.
- Diet: Within a few weeks, patients can resume eating most foods, though portion sizes will be much smaller.
Advantages of Sleeve Gastrectomy
- Effective Weight Loss: Most patients achieve significant and sustained weight loss.
- Improved Health: Many obesity-related conditions, such as type 2 diabetes, high blood pressure, high cholesterol, and sleep apnea, improve or resolve completely.
- No Foreign Objects: Unlike gastric banding, there are no implants or adjustments required.
- No Malabsorption: The procedure does not interfere with nutrient absorption, reducing the risk of vitamin and mineral deficiencies.
- Flexibility: It can be performed as a standalone procedure or as the first step in a two-stage process for patients with severe obesity.
Potential Disadvantages
- Irreversible: The procedure permanently removes part of the stomach.
- Surgical Risks: As with any surgery, there are risks such as bleeding, infection, or leaks (though these are rare, occurring in 1-2% of cases).
- Long-Term Data: While short- and medium-term outcomes are excellent, long-term data is still being collected.
- Weight Regain: Some patients may experience more weight regain in the long term compared to gastric bypass, as the metabolic effect of the sleeve is weaker.
- Reflux: Approximately 25% of patients may experience new or worsening gastro-oesophageal reflux disease (GORD) after surgery. This is often managed with acid-suppressing medications (proton pump inhibitors), but in some cases, patients may require a revision to Roux-en-Y gastric bypass to address severe reflux.
Sleeve Gastrectomy vs. Other Weight Loss Surgeries
Compared to Gastric Banding
- Pros: Faster weight loss, no foreign body, no adjustments, and greater overall weight loss.
- Cons: Irreversible and slightly higher upfront surgical risk.
Compared to Gastric Bypass
- Pros: No alteration to gut continuity, lower risk of small bowel obstruction, ulcers, or nutrient deficiencies.
- Cons: Slightly lower overall weight loss compared to gastric bypass, and less long-term data available. The metabolic effect is also weaker, which may contribute to more weight regain over time.
The Importance of Lifestyle Changes
Like all bariatric surgeries, Sleeve Gastrectomy is a tool to help you achieve your weight loss and health goals. To maximize the benefits of the procedure, it’s essential to adopt a healthy diet and incorporate regular exercise into your lifestyle. Surgery is not a standalone solution but works best when combined with long-term lifestyle changes. Your commitment to these changes will play a significant role in your success.
Is Sleeve Gastrectomy Right for You?
Sleeve Gastrectomy is an excellent option for many patients seeking a safe, effective, and sustainable weight loss solution. However, it’s important to discuss your medical history, lifestyle, and goals with a qualified bariatric surgeon to determine if this procedure is the best choice for you.
At Southwest Bariatrics, we’re committed to helping you achieve your weight loss and health goals with personalized care and support. Contact us today to learn more about Sleeve Gastrectomy and whether it’s the right step on your journey to a healthier life.
Who Should Consider Obesity Surgery?
Bariatric surgery is an effective treatment for individuals struggling with obesity and related health conditions. It is recommended for:
- BMI ≥35 kg/m² (body mass index, a measure of weight relative to height), even without additional health conditions.
- BMI 30–34.9 kg/m² with poorly controlled Type 2 diabetes or metabolic syndrome (a group of conditions that increase the risk of heart disease, stroke, and diabetes).
- Asian populations with a BMI ≥27.5–32.5 kg/m², as obesity-related health risks occur at lower BMI thresholds in these groups.
These recommendations are based on the 2022 guidelines from the American Society for Metabolic and Bariatric Surgery (ASMBS) and the International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO). These updated criteria reflect the latest understanding of obesity and its complications, expanding access to surgery for those who can benefit most.
When Should Obesity Surgery Be Avoided?
Bariatric surgery may not be suitable in the following situations:
- Active, untreated psychiatric disorders (mental health conditions like severe depression or anxiety that are not being treated).
- Substance abuse issues (current addiction to alcohol or drugs).
- Severe lung or heart disease that makes surgery unsafe (e.g., needing oxygen therapy for breathing).
- Significant endocrine disorders (hormonal problems like untreated Cushing’s Syndrome that can cause weight gain).
- Inability to comply with long-term care, such as:
- Taking vitamin supplements regularly (to avoid deficiencies).
- Attending follow-up appointments (to monitor progress and prevent complications).
- Refusing a preoperative psychological evaluation (an assessment to determine if the person is ready for surgery and the changes it requires).
Surgery is safest and most effective when these risks are addressed beforehand.
Types of Bariatric Surgery
Bariatric surgery includes several procedures, each with distinct benefits and considerations:
Roux-en-Y Gastric Bypass (RYGB)
- Creates a small stomach pouch and bypasses part of the small intestine.
- Highly effective for weight loss, Type 2 diabetes, and GERD.
- Requires vitamin and mineral supplementation due to malabsorption.
Sleeve Gastrectomy
- Removes most of the stomach, leaving a narrow "sleeve."
- Reduces hunger and does not cause malabsorption.
- Simpler with fewer complications than bypass procedures.
One Anastomosis Gastric Bypass (OAGB/MGB)
- Creates a long stomach pouch with one connection to the small intestine.
- Combines restriction and mild malabsorption, effective for diabetes and weight loss.
- Faster surgery but may cause bile reflux in some patients.
SADI-S (Single Anastomosis Duodeno-Ileal Bypass with Sleeve)
- Combines sleeve gastrectomy with intestinal bypass.
- Preserves the pylorus, reducing dumping syndrome and ulcer risk.
- Effective for higher weight loss and diabetes control.
Adjustable Gastric Band
- Places a band around the stomach to restrict food intake.
- Less commonly used due to lower long-term success and higher complication rates.
Each procedure offers unique benefits, and the choice depends on individual health needs and goals. Consultation with a bariatric surgeon is essential to determine the best option.
Obesity Surgery as a Tool
Bariatric surgery is not a quick fix but a comprehensive tool to help manage obesity. To achieve the best results, patients must commit to:
- Following a nutritionally balanced diet (eating healthy foods in the right amounts).
- Engaging in regular physical activity (exercising regularly based on your ability).
- Seeking mental health support (getting help for emotional eating or stress-related habits).
- Attending lifelong follow-up appointments (to monitor your health and prevent complications).
Surgery works best when combined with these other steps, preventing weight regain and supporting long-term success.
Proven Benefits of Obesity Surgery on Comorbidities
Bariatric surgery leads to long-term weight loss and significantly improves many obesity-related health problems, including:
- Type 2 diabetes: Many patients experience remission (their blood sugar levels return to normal without medication).
- High blood pressure: Reduced risk of heart attack and stroke.
- High cholesterol: Improved levels of fats in the blood, lowering heart disease risk.
- Obstructive sleep apnea: Improved sleep and reduced need for breathing devices (like CPAP machines).
- Joint and back pain: Less strain on joints, making movement easier.
- Non-alcoholic fatty liver disease (NAFLD): Improvement in liver health, preventing progression to severe conditions like cirrhosis.
- Polycystic ovarian syndrome (PCOS): Improved fertility and hormone balance.
These benefits improve overall health, reduce dependence on medications, and enhance quality of life.
Additional Expected Improvements
In addition to proven health benefits, bariatric surgery is associated with:
- Lower cancer risk: Reduced chance of developing certain cancers, such as breast, colon, and uterine cancer.
- Better heart health: Lower risk of heart failure and blood clots.
- Safer pregnancies: Fewer complications for both the mother and baby.
- Reduced stroke risk: Fewer cases of cerebrovascular events (like strokes).
Bariatric surgery offers life-changing benefits beyond weight loss, improving health and longevity.