Biliopancreatic Diversion with Duodenal Switch (BPD/DS)

• Removes a portion of the outer side of the stomach
• Decreases the remaining portion of the stomach to about five to eight ounces
• Preserves the pylorus, so it can still function normally
• The stomach begins at about the size of a soda can and typically doubles in size as time passes

Roux-en-Y Gastric Bypass (RYN)

• Can be performed in either a traditional open surgery or as a laparoscopic procedure
• Reduces the stomach from the size of a large grapefruit to the size of a golf ball
• Decreases the amount of food the stomach can physically hold
• Reconfigures the small intestine so food bypasses the first and second segment of the intestines (about two or three feet)
• Reduces the efficiency of nutrient absorption
  

 Lap-Band System

• Restricts how much the stomach can hold by laparscopically placing an adjustable silicone elastomer band around the upper part of the stomach
• Band is pulled around the stomach to form a ring, and a locking part securely holds the band in a circle around the stomach
• No cutting or stapling is needed to divide the upper stomach