In a surgery, an adjustable gastric band is inserted surgically around the top of the stomach to create a small pouch in the upper stomach to reduce the stomachâs capacity to take in food.

Laparoscopic Adjustable Gastric Band Surgery

Explanation:

Here, the  surgeon places a ring with an inner inflatable band around the top of your stomach to create a small pouch. This makes you feel full after eating a small amount of food.

i think its pulmonary not sure tho