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Laparoscopic Gastric Bypass

Gastric bypass surgery is the most widely performed bariatric surgery in the world for weight loss. At Barnes-Jewish West County Hospital, our Washington University surgeon has years of experience using gastric bypass to help our patients meet their weight-loss goals.

Laparoscopic Gastric Bypass for Weight Loss: How It Works

Gastric bypass is a permanent surgery that helps you lose weight by safely reducing the amount of food you can eat and the amount of calories your body can absorb.

The bariatric surgeon performs gastric bypass using laparoscopic surgery, a minimally invasive approach. Using just a few small incisions, the procedure allows you to heal faster and with a lower risk of complications than open surgery.

During the procedure, your surgeon:

  1. Divides the stomach into two parts:
    • Small “pouch” created from the top part of the stomach
    • Larger section called the remnant
  2. Connects the pouch to a location on the small intestine that is past the duodenum (first part of the small intestine). Doing so bypasses the remnant stomach and the top part of the small intestine, where most of the calories from food are absorbed. That helps you lose weight.

Because the pouch holds only one to two ounces of food or liquid at a time, it limits the amount of food you can consume and helps you feel full faster. The remnant stomach is still able to produce needed enzymes for digestion, though.

The bypass does prevent some nutrients in your food from being absorbed. To replace these nutrients, you will need to take nutritional supplements such as vitamins and minerals.

Laparoscopic Gastric Bypass Surgery: Advantages

Compared with other types of bariatric surgery, gastric bypass offers:

  • 60 percent to 80 percent weight loss: On average, patients who have a gastric bypass lose 60 percent to 80 percent of their excess body weight.
  • Less weight regain: With the gastric bypass, patients can keep the weight off — with less regain — for years after surgery.
  • Improvement of other conditions: Many patients see improvement in some obesity-related health conditions, such as depression, diabetes, high blood pressure and sleep apnea.

Watch this video to learn more about laparoscopic gastric bypass surgery.

Our Options for Weight-Loss Treatment

Gastric bypass surgery is part of our comprehensive weight-loss program. Find out more about our bariatric surgery program and services, including physical therapy through our on-site Sports Therapy and Rehabilitation Center (STAR), nutrition support for weight loss and health checks.

We offer a full range of surgical and nonsurgical weight-loss treatments. Our options include:

Contact Us for Weight-Loss Treatment

For more information or to schedule an appointment with a bariatric physician, call Barnes-Jewish West County Hospital at 314.542.WEST (9378) or toll-free at 844.542.9378.

Barnes-Jewish West County Hospital is conveniently located just one mile west of I-270 in Creve Coeur, Missouri — a west county suburb of St. Louis.

The Washington University Bariatric Surgery office is located in Medical Office Building 1, Suite 120. The address is 1040 North Mason Road, at the corner of North Mason and Olive Boulevard. Get directions and maps.


Christopher Eagon, MD

Dr. Eagon is a Washington University bariatric surgeon at Barnes-Jewish West County Hospital

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Find a doctor or make an appointment: 314.542.WEST (9378) OR TOLL-FREE 1.844.542.9378
General Information: (314) 996.8000
12634 Olive Boulevard
Creve Coeur, Missouri 63141
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