Gastric Bypass

What is Gastric Bypass ?

1 November 2024 –

Ernesto Escobar, MD

Gastric bypass surgery involves reducing the size of the stomach and rerouting food passage, so it bypasses a large portion of the intestine. This allows patients to digest and absorb nutrients more effectively, helping them maintain proper nutrition.

In simpler terms, it creates a small pouch or stomach reservoir that connects directly to the small intestine and absorbs fewer calories through the bypass.
There are two main types of gastric bypass: Roux-en-Y gastric bypass and Mini Gastric Bypass (OAGB). To better understand these surgeries, please consult a specialist by clicking here.

The effect of gastric bypass is not only due to the reduced amount of food intake or lower calorie absorption, but also to metabolic changes caused by the secretion of an intestinal hormone called GLP-1. This hormone helps pancreatic cells produce insulin and prevents their destruction. It also decreases insulin resistance, allowing many diabetic patients to stop using medication for their condition (remission).
Contrary to popular belief, Roux-en-Y gastric bypass does not cause diarrhea, vitamin deficiencies, or malnutrition if patients follow the recommendations provided by the multidisciplinary team, allowing them to lead a normal life.

Gastric bypass was first performed in the 1960s in the United States, and since then, it has undergone modifications that have improved the effectiveness of the surgery. Today, the standard treatment is to perform this surgery through minimally invasive techniques (laparoscopic surgery, using a video camera and small incisions).
The power and effectiveness of gastric bypass are most evident in patients who already have obesity-related diseases or conditions that worsen with obesity, such as:

What is Gastric Bypass ?

Each case should be evaluated individually to determine which type of surgery is the most suitable. To find out if you may benefit from this surgery.