Gastric bypass and gastric sleeve are both medical procedures. One of the ways to differentiate between the two procedures is by comparing how they work. Gastric bypass is a procedure that involves the rerouting of the intestines so that the intestines and stomach can be bypassed.
Gastric sleeve, on the other hand, refers to a medical procedure that ensures the removal of some parts of the stomach leaving the sleeve unaffected. Unlike in gastric bypass, where the intestines and stomach are rearranged to give a y-like shape, the gastric sleeve does not have anything to do with the intestines.
Another difference is that, though gastric sleeve and gastric bypass come with complications, the latter has more severe complications compared to the former. Another difference is that the gastric sleeve is not as expensive as the gastric bypass. However, both procedures are used to help patients achieve weight loss so they can eat less food because their stomachs can only hold less food.