Gastric Bypass

Gastric Bypass Procedure

Laparoscopic Roux-en-Y gastric bypass surgery is one of the two malabsorptive surgical weight loss options we offer at AtlantiCare. Gastric bypass has been considered one of the most effective surgical weight loss approaches available today. By constructing a smaller stomach pouch 15 to 30 ml from the upper portion of the stomach it reduces the capacity of food consumption. The small intestine is divided below the lower stomach pyloric outlet and is re-arranged into a Y-configuration, enabling outflow of food from the small upper stomach pouch via a "Roux limb". Re-construction of the intestinal tract allows for drainage of both segments of the stomach. The alimentary limb of the intestines is then brought up to the remains of the stomach. By bypassing a portion of the small intestines the body will absorb fewer calories and nutrients, potentially providing greater weight loss and health benefits. 

Gastric Bypass


Patients who choose to have laparoscopic gastric bypass surgery will typically experience these benefits:

  • Decreased or complete remission of health disorders resulting from extreme overweight*, such as:
  • Diabetes
  • High blood pressure
  • Gastric reflux
  • Sleep apnea and other conditions
  • Increased mobility
  • Improved psychological wellness
  • Improved social interactions
  • And, most important, overall improvement in quality of life

*Improvement or complete resolution of medical problems is not guaranteed and they may recur if weight is regained.

What the Procedure Involves

Gastric bypass limits food consumption by using surgical staples to divide the stomach into two sections:

  • A small upper portion that is the usable portion, which holds only a few ounces of food eaten at one time; and
  • A large lower portion, which is considered a “remnant” (unused section).

In addition, the intestine is redirected so that it connects with both sections of the stomach, creating a Y-shaped formation – as indicated in the procedure’s name.

By reducing the size of usable stomach and reconfiguring the intestine, the procedure restricts the quantity of food that can be eaten and absorbed, creating early fullness and greater satiety (satisfaction from eating a small amount), which typically results in weight loss.



Coleman, K. J., Huang, Y. C., Hendee, F., Watson, H. L., Casillas, R. A., & Brookey, J. (2014). Three-year weight outcomes from a bariatric surgery registry in a large integrated healthcare system. Surgery for Obesity and Related Diseases10(3), 396-403.

Pories, W. J. (2005). Cartoon. Surgery for Obesity and Related Diseases1(3), 387.