Gastric bypass surgery is a common method in obesity surgery. It is a combined method that leads to a reduction in the amount of food and also to a reduction in utilization. Gastric bypass surgery is performed by minimizing the stomach to a small pouch and diverting the small intestine upwards at a specific point.

In this operation, like in gastric sleeve surgery, the rest of the stomach is not removed. However, there is no food intake in the remaining stomach. The rest of the stomach continues to make gastric juices and enzymes to digest and absorb nutrients. Because of the reduction in the stomach, patients with gastric bypass eat less food and therefore consume fewer calories. Since the ingested food passes from the reduced stomach directly into the small intestine, most of the nutrients and high calories are not absorbed, thus reducing weight.

In gastric bypass operations that are performed laparoscopically, there are no deep incisions in the skin and, accordingly, no pain.


Gastric bypass surgery is suitable for patients between 18 and 65 years of age who have a long history of dieting, are life-threatening overweight and have a body mass index over 40 kg / m2. It is also suitable for patients with a body mass index between 35-40 kg 2 who experience symptoms such as weight-dependent insulin resistance, sleep apnea, heart disease and joint problems. The gastric bypass is used as a revision operation in patients who have already had a sleeve gastrectomy and have unfortunately been unsuccessful.

The benefits of gastric bypass surgery

Gastric bypass surgery minimizes the stomach, which limits the absorption of nutrients, as the small intestine has been severed, the absorption of nutrients (especially fat and sugar) is reduced. This speeds up the weight loss process. Due to the shrinking of the stomach, patients become full more quickly when they eat, although they eat less food. The risk of joint disease, sleep apnea, high blood pressure, high cholesterol, and heart disease, especially diabetes, that can occur due to being overweight are reduced. As a result, gastric bypass surgery creates a new stomach, so to speak, which is narrower than a normal stomach, which is why most patients feel full for a longer period of time.

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