How LAP-BAND Surgery Works

The LAP-BAND® Adjustable Gastric Banding System is a form of weight loss surgery that is is becoming more popular because of its lower costs and quicker recovery times.

The operation is also perceived as being less invasive than the more commonly used Roux-en-Y gastric bypass procedure.

The laparoscopic adjustable gastric banding procedure is often called LAP-BAND® system, after the inflatable silicon band that divides the stomach, creating a very small stomach pouch with an adjustable opening to the rest of the stomach. The diameter of the band is usually about two inches, but the surgeon can adjust its diameter by pumping saline into it from a reservoir implanted under the patient's skin.

When the band is in place, the stomach takes on an uneven hour-glass shape, with the smaller portion at the top.

Unlike the Roux-en-Y gastric bypass surgery, the gastric banding procedure does not reroute the upper intestine. Weight loss occurs solely because the size of the stomach is restricted. The adjustable band decreases the amount of food the patient can eat at one time, but does not otherwise interfere with the digestive process.

Because the procedure does not bypass any portion of the intestines, patients who have the gastric banding operation don't usually experience one of the Roux-en-Y operation's more uncomfortable side effects, the dumping syndrome. After a Roux-en-Y gastric bypass operation the patient is unable to eat sugary foods, and some patients are also unable to eat red meats and any food with high fat contents. When patients attempt to eat these foods they become nauseous and may vomit, making the experience extremely uncomfortable.

Since the lap band operation does not cause this side effect, post-operative patients are still able to eat the foods that originally led them to obesity, and for this reason long-term nutritional and behavioral counseling is usually recommended.