Bariatric Surgery

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Bariatric surgery is a medical procedure aimed at aiding weight loss in individuals who are severely obese. It encompasses a variety of procedures that either restrict the intake of food, reduce the absorption of food, or a combination of both. This article provides an overview of the types, mechanisms, outcomes, and considerations associated with bariatric surgery.

Types of Bariatric Surgery[edit | edit source]

There are several types of bariatric surgery, each with its own specific approach and intended outcomes. The most common types include:

  • Gastric Bypass Surgery: This procedure involves creating a small pouch at the top of the stomach and connecting it directly to the small intestine, bypassing a large part of the stomach and a segment of the small intestine. This not only restricts the amount of food that can be consumed but also significantly decreases the absorption of nutrients and calories.
  • Sleeve Gastrectomy: In this procedure, approximately 80% of the stomach is removed, leaving a tube-shaped stomach about the size and shape of a banana. This limits the amount of food that can be eaten and decreases the appetite-regulating hormone ghrelin.
  • Adjustable Gastric Band: This involves placing a band around the upper part of the stomach to create a small pouch that can hold only a small amount of food. The band's tightness can be adjusted to change the size of the passage between the pouch and the rest of the stomach.

Mechanism of Action[edit | edit source]

Bariatric surgery works through one or more of the following mechanisms:

  • Restriction: Procedures that physically limit the amount of food the stomach can hold, which increases the feeling of fullness after eating small amounts of food.
  • Malabsorption: Procedures that shorten or bypass part of the small intestine, which reduces the amount of nutrients and calories the body absorbs.
  • Hormonal changes: Surgery can lead to changes in gut hormones that help with weight loss and decrease in appetite.

Outcomes and Benefits[edit | edit source]

The primary outcome of bariatric surgery is significant weight loss, which often occurs over a period of 12 to 24 months post-surgery. Other potential benefits include:

Risks and Considerations[edit | edit source]

Like any major surgery, bariatric surgery carries potential health risks and side effects. These may include:

  • Nutritional deficiencies due to malabsorption
  • Risk of surgery-related complications such as infection, blood clots, and bleeding
  • Long-term risks including hernias, ulcers, and bowel obstruction

Patients considering bariatric surgery should undergo a thorough evaluation and continue to receive medical follow-up to manage the effects of the surgery and ensure adequate nutrient intake.

Conclusion[edit | edit source]

Bariatric surgery is a powerful tool for achieving significant weight loss and improving overall health in individuals with severe obesity. However, it requires a lifelong commitment to dietary changes, regular exercise, and medical follow-up to maintain the benefits of surgery.


Contributors: Prab R. Tumpati, MD