MGB is a simpler, safer and less invasive procedure that involves only one connection (anastamosis) instead of the two that are created with Roux-en-Y. This eliminates the chances of leakage or obstruction at the second connection site, something that does occur in a small number of cases with Roux-en-Y.
With the MGB, the lower connection point on the mini stomach creates less tension and therefore less chance of leakage. The high anastamosis that is typically created with Roux-en-Y can create more tension and put added stress on the connection point. This is associated with leakage.
Should the need arise the MGB can be reversed with laparoscopic surgery. Roux-en-Y is very difficult to reverse and would only happen under very unusual circumstances. This would require open surgery.
After MGB the mini stomach is longer than with Roux-en-Y, so food passes through more slowly. This means that you feel fuller for longer and you are unlikely to experience the ‘dumping’ syndrome.
The ‘dumping syndrome’ is a problem for most people after Roux-en-Y bypass. This is rarely (almost never) experienced by people after MGB bypass. The ‘dumping’ syndrome occurs when the solid parts of a meal get ‘dumped’ directly from the stomach into the small intestine without being digested. this generally leads to some extremely unpleasant side effects and can lead to malnutrition if not treated.
