Gastric Bypass is a combination procedure using both restrictive and malabsorptive elements. With this surgery, first the stomach is stapled to make a smaller pouch. Then most of the stomach and part of the intestines are bypassed by attaching (usually stapling) a part of the intestine to the small stomach pouch. The result is that you cannot eat as much and you absorb fewer nutrients and calories.
Advantages
Rapid initial weight loss
Minimally invasive approach is possible
Longer experience in the U.S.
Higher total average weight loss reported than with LAP-BAND or VBG
Disadvantages
Cutting and stapling of stomach and bowel are required
More operative complications than with LAP-BAND
Portion of digestive tract is bypassed, reducing absorption of essential nutrients
Medical complications due to nutritional deficiencies
"Dumping syndrome" can occur
Non-adjustable
Extremely difficult to reverse
Higher mortality rate than LAP-BAND or VBG procedures
The LAP-BAND System adjustable gastric banding procedure restricts the amount of food the stomach can hold by placing an inflatable silicone band around the upper part of the stomach. The new, small upper stomach pouch limits the amount of food that can be consumed at one time, and a narrowed stomach outlet increases the time it takes for the stomach to empty. The subsequent reduction in food intake results in weight loss.
Advantages
Lowest mortality rate
Least invasive surgical approach
No stomach stapling or cutting, or intestinal re-routing
Adjustable
Reversible
Lowest operative complication rate
Low malnutrition risk
Disadvantages
Slower initial weight loss than Gastric Bypass or BPD
Regular follow-up critical for optimal results
Requires an implanted medical device
In some cases, effectiveness can be reduced due to band slippage
In some cases, the access port may leak and require minor revisional surgery
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