I have not seen this done for morbid obesity. In my hospital there is a group with considerable experience in bariatric surgery (over 1000 cases) they have stopped doing anterio gastric bypasses because they had a few patients with ulcers and even cancer of the distal stomach and duodenum. They are now doing either SRVG or VBG. Both of these are effective in weight reduction, and a pediatric scope can be introduced into the stomach for visualization.
I would caution, however, that these operations are associated with significant morbidity and mortality. and that, IMHO, should be reserved to those few patients with life threatening complications of obesity, such as sleep apnea, pickwikian syndrome or uncontrollable hypertension or diabetes.