A Comprehensive Guide to Bariatric Surgery: Gastric Bypass Surgery and Sleeve Gastrectomy
13 Jul, 2023

Obesity has become a global health concern, affecting millions of people worldwide. For individuals struggling with severe obesity and its associated health risks, bariatric surgery offers a ray of hope. Among the most commonly performed bariatric procedures are gastric bypass surgery and sleeve gastrectomy. In this article, we will explore these two surgeries in detail, shedding light on their benefits, risks, and considerations.

Gastric Bypass Surgery

Gastric bypass surgery also known as Roux-en-Y gastric bypass, is a surgical procedure designed to help individuals achieve significant weight loss by altering their digestive system. The procedure involves dividing the stomach into a smaller upper portion and a larger lower portion. The surgeon then reroutes the small intestine to connect directly to the smaller stomach pouch, bypassing the larger portion of the stomach and part of the small intestine.


  1. Effective Weight Loss: Gastric bypass surgery promotes weight loss by restricting food intake and reducing calorie absorption. Patients typically experience significant weight loss in the first year, with the potential for sustained weight loss in the long term.
  2. Metabolic Improvements: The surgery has been found to improve or resolve obesity-related conditions such as type 2 diabetes, high blood pressure, sleep apnea, and high cholesterol levels.
  3. Reduced Hunger and Increased Satiety: By reducing the size of the stomach and altering the gastrointestinal hormone response, gastric bypass surgery can help patients feel full more quickly and stay satisfied for longer periods.

Risks and Considerations:

  1. Surgical Risks: As with any major surgical procedure, gastric bypass surgery carries risks such as infection, bleeding, blood clots, and adverse reactions to anesthesia.
  2. Nutritional Deficiencies: Patients must commit to lifelong vitamin and mineral supplementation due to reduced nutrient absorption. Regular monitoring of nutrient levels is essential to prevent deficiencies.
  3. Lifestyle Changes: Bariatric surgery requires significant lifestyle modifications, including dietary changes, regular exercise, and ongoing psychological support. Patients must be ready to make long-term commitments to healthy habits in order to ensure the success of the surgery.

Sleeve Gastrectomy

Sleeve gastrectomy, also known as vertical sleeve gastrectomy or gastric sleeve surgery, involves removing a large portion of the stomach to create a smaller, banana-shaped sleeve. The procedure limits food intake and decreases the production of appetite-stimulating hormones, resulting in weight loss.


  1. Weight Loss: Sleeve gastrectomy facilitates substantial weight loss by restricting the amount of food the stomach can hold, promoting a feeling of fullness.
  2. Metabolic Improvements: This procedure often leads to improvements in obesity-related conditions, including type 2 diabetes, hypertension, and sleep apnea.
  3. Simplicity and Lower Risk: Compared to gastric bypass surgery, sleeve gastrectomy is a relatively simpler procedure with a shorter hospital stay and lower risk of complications.

Risks and Considerations:

  1. Surgical Risks: While generally considered safe, sleeve gastrectomy carries the usual surgical risks, such as infection, bleeding, and blood clots.
  2. Irreversible Procedure: Sleeve gastrectomy is a permanent surgical alteration of the stomach. Unlike gastric banding, it cannot be reversed.
  3. Acid Reflux: Some patients may experience acid reflux or heartburn after the procedure, requiring ongoing management and medication.


Both gastric bypass surgery and sleeve gastrectomy have proven to be effective bariatric procedures for significant and sustained weight loss. However, it is crucial for individuals considering these surgeries to consult with a qualified bariatric surgeon, undergo a thorough evaluation, and carefully consider the potential risks and benefits. Moreover, post-operative support, including dietary counseling, regular exercise, and psychological assistance, plays a vital role in achieving long-term success.

Remember, bariatric surgery is not a quick fix but a tool that, when used in conjunction with a commitment to lifestyle changes, can help individuals achieve improved health and an enhanced quality of life.

 It is also worth mentioning that the method of bariatric surgery is chosen by the surgeon based on the data of the patient's clinical-laboratory, instrumental examinations and specialist consultations.