Gastric Bypass
Gastric Bypass is one of the earliest and most studied surgical methods for obesity treatment. It reduces both the stomach’s volume and the absorption of food. However, in recent years, it has been largely replaced by newer techniques such as Gastric Sleeve, Mini Gastric Bypass, and Transit Bipartition.

Once making up 63% of all obesity surgeries in 2003, this figure dropped to 46% in 2013 and further decreased to 25% by 2016. While it was the most common method until 2012, Gastric Sleeve surgery has now become more popular.

Who Can Have Gastric Bypass?
Gastric Bypass can be performed on individuals with a BMI over 40. It is also suitable for those with a BMI above 35 if they suffer from conditions such as insulin resistance or orthopedic problems that affect their quality of life. Additionally, it can be applied as a revision surgery for patients who have had previous obesity surgeries.

How Is Gastric Bypass Surgery Performed?
The most common type is Roux-en-Y Gastric Bypass (RYGB). This involves creating a small pouch by stapling the upper portion of the stomach, significantly limiting food intake. The pouch is then connected directly to the small intestine (Roux limb), bypassing most of the stomach and upper intestine, reducing calorie absorption. The surgery is performed laparoscopically (minimally invasive).

Gastric Bypass vs. Gastric Sleeve: Which Is Better?
Gastric Bypass is especially preferred for patients suffering from long-term diabetes or acid reflux. However, due to anatomical changes involved in bypass procedures, many surgeons now recommend Gastric Sleeve surgery.

In Gastric Sleeve, part of the stomach is removed to reduce hunger hormone production, without altering the intestines. This keeps the natural anatomy more intact compared to Gastric Bypass.

While Gastric Sleeve can be revised or repeated if necessary, Gastric Bypass is not easily reversible because of its more extensive anatomical changes. Gastric Bypass also carries risks such as ulcers at the stomach-jejunum junction, intestinal complications, and higher chances of nutritional deficiencies compared to Gastric Sleeve.