This procedure reduces the stomach's volume and also eliminates the part of the stomach that produces the hormone that stimulates hunger. Approximately 85 percent of the stomach is removed, with the remaining stomach volume measuring around 2 to 5 ounces. Other than the reduction in volume, the stomach tends to function normally, so most foods can be consumed, but in small amounts.
Because this procedure doesn't involve intestinal bypass, it's a good option for people with existing conditions such as anemia or Crohn's disease. It can be performed laparoscopically on most patients, even those with a high BMI. After the initial weight loss, patients on the higher end of the BMI scale may need a second-stage procedure to lose the remaining weight.
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