Pyloroplasty is performed while the patient is under general anesthesia and placed in the supine position.[1][2] The surgery can be performed as an open surgery or by a laparoscope. If performed as an open surgery, the surgeon will make a large surgical incision on the abdomen to open the area, and incise through some of the pyloric sphincter to widen and relax it.[1] A midline incision is most commonly used for this procedure.[3] If performed by laparoscope, 3 to 5 small incisions are made on the abdomen. The abdomen is filled with carbon dioxide so that the surgeon looking through the small camera can see the area.