Gastric Banding to RNY Gastric Bypass (or mini-gastric bypass) can also be performed to revise a failed lap band surgery. The first option is to have the gastric bypass surgery as a standalone procedure. If you choose the RNY by itself, the surgeon will remove the lap band laparoscopically before converting it to the roux-en-y gastric bypass.
The second option is to have a gastric bypass combined with your existing lap band to increase the odds of weight loss long-term. Unfortunately, the bigger the reward, the biggest the risk. With the band/bypass combination, you will also inherit the risks, complications, and side effects of both bariatric procedures.
Patients can lose about 75% of their excess weight in the first year with the standalone gastric bypass. The RNY bypass is more complex than the sleeve involving rerouting the small intestine after forming a tiny, new stomach pouch. Weight loss is enhanced by utilizing both restriction and malabsorption. Although this is a popular revision option, it is not usually our first choice.