Gastric Bypass Surgery
Gastric Bypass SurgeryThe Gastric Bypass Surgery (GBS) combines both restrictive and malabsorption processes. The creation of a small stomach pouch causes restricted food intake and construction of bypasses of the duodenum and other segment of the small intestine causes malabsorption, which decreases ability to absorb calories and nutrients from food.
There are two types of GBS.
The first type is known as Roux-en-Y Gastric Bypass (RGB).This surgery was the first performed in US and today it is most popular Gastric bypass surgery all over the world. A small stomach pouch is created by stapling part of the stomach together or by vertical branching. Thereafter, a Y-shaped section of the small intestine is attached to the pouch to allow food to bypass the duodenum as well as the first portion of the jejunum. Now it is possible to perform this surgery by laparoscopic technology.
Another type of GBS is called extensive gastric bypass or biliopancreatic diversion. This type is more complicated than RGB. The lower portion of the stomach is surgically removed. The remaining pouch is connected directly to the final segment of the small intestine .As a result both duodenum and jejunum are bypassed. This type is not very popular as it has a risk for nutritional deficiencies.
People who undergo gastric bypass surgery are at risk for Pouch stretching. The stomach may stretch back to its original size before surgery. Sometimes the breaking of staples can reverse the procedure. Leakage of stomach contents into the abdomen can cause acid eat other organs.
Some people complain of Dumping Syndrome. It occurs when stomach contents move too rapidly through small intestine. It causes nausea, vomiting, weakness, sweating, faintness and diarrhea after eating. Gallstone can occur in response to rapid weight loss. The limited absorption of vitamin B-12 and iron can cause anemia. The lack of calcium absorption causes osteoporosis.
But, the benefits of the surgery definitely outweigh the risks. More than 75% of the patients are expected to lose 75-80% of their excess body weight .About 70-80% of the patients stop taking medication for hypertension. Other conditions such as sleep apnea, asthma, joint pain, arthiritis, fatigue, shortness of breath are drastically improved if not completely resolved.
By Weight loss Tucson, November 17, 2009 @ 8:16 am
Some more information:
The Gastric Bypass was first performed in the Unites States in 1966. Since then, several improvements to the procedure have been made including the ability to perform the operation laparoscopically. The Gastric Bypass induces weight loss by two very independent processes.
The Gastric Bypass involves remodeling the stomach into a small pouch. Once the size of a small football, the stomach will become the approximate size of a medicine cup (1 oz.). Nothing is removed from the body. The remaining stomach is left in its normal position with its normal blood supply, and will function as it did before surgery. The only difference will be that the stomach enzymes will not meet with food until farther down the intestinal tract. The new, smaller, stomach pouch will restrict how much you are able to eat. Early satiety and forced portion control will not only lessen caloric intake, it will help teach your body and mind better eating habits.
The Gastric Bypass also induces weight loss by malabsorption. The “Y” of Roux-en-Y actually represents how the small intestine is reconstructed. The digestive enzymes travel down one side, the food down the other, and they meet at the stem of the “Y” for absorption in the mid-portion of the small intestine. When the food “bypasses” much of the stomach and a length of small intestine, fewer calories are absorbed.
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