Gastric Bypass

Roux-en-Y gastric bypass surgery uses a combination of restriction and malabsorption. During the procedure, the surgeon creates a smaller stomach pouch. The surgeon then attaches a Y-shaped section of the small intestine directly to the pouch. This allows food to bypass a large portion of the small intestine, which absorbs calories and nutrients. Having the smaller stomach pouch causes patients to feel fuller sooner and eat less food; bypassing a portion of the small intestine means the patients body absorbs fewer calories.


Excess Weight Loss:
Gastric bypass patients typically lost 61.6 percent of their excess weight.

Health Benefits:
Studies found that gastric bypass:

  • Resolved type 2 diabetes in 83.8% of patients and often resolved the disease within days of surgery.
  • Resolved high blood pressure in 75.4% of patients.
  • Improved high cholesterol in 95% of patients.

Quality of Life:
One meta-analysis stated that bariatric surgery patients who experienced significant weight loss had:

  • Overall quality of life improved greatly.
  • They experienced improved physical functioning and appearance.
  • They experienced improved social and economic opportunities.

One study found that gastric bypass patients were able to:

  • Leave the hospital after two days
  • Return to work after 21 days

Potential Concerns of Gastric Bypass:
A condition known as dumping syndrome can occur from eating high-fat, high-sugar foods. While it isnt considered a health risk, the results can be very unpleasant and may include vomiting, nausea, weakness, sweating, faintness, and diarrhea.
Patients must supplement their diet with a daily multivitamin and calcium. Some patients must take vitamin B12 and/or iron.
The stomach, duodenum, and parts of the small intestine cannot be seen easily using X-ray or endoscopy if there are problems after surgery such as ulcers, bleeding, or malignancy.