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UPMC Chautauqua Bariatric Center Header

Bariatric Center
UPMC Chautauqua
31 Sherman Street Building, Suite 2500
(directly behind
UPMC Chautauqua)
Jamestown, NY 14701

(716) 485-7870
Fax: (716) 485-7878

7:30 a.m. – 4:00 p.m.

Our Bariatric Physician

Galo Grijalva, MD FACS
Board-certified Surgeon

Gastric Bypass DiagramThis is a diagram of the gastric bypass procedure. Your stomach will be made smaller by stapling and dividing it into two compartments. The smaller compartment is called a pouch. The larger part of the stomach is bypassed, meaning that the food is going around it, rather than passing through it. A small opening called an outlet is made in the newly formed pouch and is connected to a limb of intestine. The food will pass directly from the pouch into the intestine, but it will take several hours for the pouch to empty because the outlet opening is small, making you feel full longer. Also, because the pouch holds approximately 2 ounces of food, you will eat less food at one time – this will help you lose weight.

You will eat smaller quantities of food and you will feel full very quickly. Because the limb of intestine used to empty your stomach will bypass the upper part of your intestines, it will reduce the absorption of food, which will also help you to reduce and control your weight. You will need vitamin and mineral replacements because the main stomach and the first part of the small intestine are bypassed.

As you begin to eat and take medication, remember that everything passing through the stomach must be small enough to fit through the opening of the outlet. As a guideline, food should be able to pass through a straw, which is why you are placed on a special liquid diet immediately following surgery. The goal is to let the stomach heal; only liquids and soft solids should be eaten during the first two months. Since many pills are quite large and will not fit through the outlet, we ask you to crush all medications or take them in liquid or chewable form. You will receive written instructions on the proper diet to follow from your dietitian.