Final answer:
The Roux-en-Y gastric bypass is a bariatric surgery procedure where a portion of the stomach is removed, and an anastomosis is created between the remaining stomach pouch and the jejunum.
Step-by-step explanation:
The procedure where a portion of the stomach is removed and an anastomosis is created between the stomach and jejunum is known as Roux-en-Y gastric bypass. In this bariatric surgery, the majority of the stomach is closed off from the digestive tract, forming a small pouch. This pouch is then directly attached to the jejunum, effectively bypassing both the stomach and duodenum. This surgical modification aids in limiting food intake and absorption of nutrients, thereby helping in the treatment of obesity.