Final answer:
Pyloroplasty is the surgical procedure that enlarges the passage between the stomach's prepylorus and the duodenum, which is different from the bariatric surgery procedures such as Roux-En-Y gastric bypass.
Step-by-step explanation:
Surgical enlargement of the passage between the prepylorus of the stomach and the duodenum is known as pyloroplasty. This procedure modifies the pyloric valve, which is the part of the digestive system that controls the release of gastric contents from the stomach into the duodenum. Pyloroplasty is used to alleviate conditions such as pyloric stenosis, where the passage is narrowed, leading to obstruction.
Roux-En-Y gastric bypass is a different type of bariatric surgery which involves creating a small pouch from the stomach and connecting it directly to the small intestine, bypassing a significant portion of the stomach and duodenum. This procedure is primarily designed to treat obesity by limiting food intake and nutrient absorption.