What happens if the bypass fails?
Just like any other intervention, bypass can yield positive or negative results.
If the bypass fails, you should contact a doctor who has experience in bariatric revision procedures and see if you qualify for band over bypass.
It is possible to not lose weight or to start regaining weight after a gastric bypass procedure. This might happen even if the intervention itself was successfully performed. If you see that your weight loss is not going as expected, you should contact your doctor. Sometimes, the weight regain happens because the patient didn’t follow the necessary dietary guidelines.
Source: https://www.cedars-sinai.edu/