Obesity is a disease causing aggravation of more acute and lethal diseases, such as diabetes, hypertension and any related heart disease. Many people suffering from obesity have tried to lose weight with diets made specifically for your body and have failed, or even with exercise but they have not been successful, by which resort to a surgical intervention that can help them lose weight fast and safely. Gastric bypass is the best choice for these people who have suffered from obesity for at least 5 years and who have a BMI greater than 40. Scientists have shown that with the completion of a gastric bypass, patients suffering from hypertension or heart disease have improved significantly, and that patients with diabetes have been reached to control his illness to the degree never need injections of insulin. Gastric bypass can be performed in two ways, via open and through a laparoscopy, which consists in the realization of a small incision by which to enter a camera to be able to perform the operation. The second option is the most widely used, by the fact of being less invasive also by the fact that his recovery time is shorter and the scar is much smaller. In Monterrey, obesity is one of the main diseases causing deaths, so many doctors have specialized in the realization of this surgery, the gastric bypass.