Dr. Wade Barker explains laparoscopic gastric bypass surgery at his DallasFt. Worth bariatric surgery center.br br Gastric bypass surgery helps patients lose weight because it greatly restricts the amount of food they can eat and limits absorption of some calories. During Roux-en-Y gastric bypass surgery, DallasFt. Worth surgeon Wade Barker, M.D., uses staples to create a small pouch at the top of the stomach. He then connects this pouch to the lower part of the small intestine.br br Visit and for more information about weight loss surgery.