How Weight Loss Surgery Works to Reduce Morbid, Malignant Obesity
Gastric band restricts food intake, bypass
limits calorie absorption
is Bariatric Surgery | Types
| How Effective |
After Weight Loss Surgery | Laparoscopic
How Weight Loss Surgery
After chewing, food passes through the esophagus to the stomach, whose stomach acids break it into smaller particles. It then passes into the small intestine where it's nutrients are ingested. First, in the duodenum, calcium, iron and a few vitamins are absorbed. Next, in the jejumum and ileum, the remaining (majority) of food nutrients and calories are absorbed. The indigestible food remnants (mainly fiber) continue through to the large intestine and are duly excreted.
Weight loss surgery works by reducing appetite and calorie-intake. During gastric surgery, the stomach-size is greatly reduced. This reduces appetite significantly. Also, in some stomach surgery procedures, part of the small intestine is "bypassed" to reduce the number of calories (and nutrients) that can be absorbed.
This kind of "restrictive" bariatric surgery uses a gastric band/ring or staples to reduce stomach size. It makes no attempt to alter the anatomy of the digestive tract by (eg) bypassing the small intestine. This kind of bariatric procedure produces less weight loss.
This type of weight loss surgical operation shrinks the size of the stomach AND bypasses some (or most) of the early section of the small intestine (duodenum). The bypass causes less food (therefore calories and nutrients) to be absorbed. Hence these operations are called "malabsorptive". This kind of bariatric procedure produces greater weight loss.
Neither restrictive nor malabsorptive procedures can be successful unless patients follow the dietary and exercise guidelines issued to them by their surgeon.
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Laparoscopic or open bariatric surgery, such as gastric banding or bypass is not an easy solution to morbid obesity and weight loss. It is a serious surgical procedure, involving health risks. To produce lasting weight loss it requires a long-term patient commitment to eating a healthy diet and following a regular program of physical exercise. Life-long use of nutritional supplements may also be necessary. So, before deciding, discuss your options fully with your doctor. © 2003-2018 Bariatric-Surgery.Info - Terms - Contact - Information - Resources