Roux-en-Y Gastric bypass

There are two main principles of bariatric surgery. These exist in combination or alone: restriction and malabsorption. Purely restrictive operations limit the amount of solid food that can be consumed.
Roux-en-Y gastric bypass is both a restrictive and malabsorptive operation
Similar to VBG, a small pouch is created by either stapling or transecting the proximal stomach.  The pouch is then connected to and empties into a Roux-en-Y limb of jejunum.
Induce weight loss by causing malabsorption of calories, inducing a dumping syndrome and altering appetite through alterations in GI peptides.

Bypass surgery for obesity


  • 60% of excess weight lost in year 1
  • Maintains a weight loss of 50% for 25 years
  • Rapid resolution of metabolic syndrome
  • Improvement in obesity-related complications


  • Severe dumping syndrome – rapid rush of liquid/soft high caloric food “dumping” into limb of small intestine causing discomfort, nausea, bloating, diarrhea, weakness
  • High risk of nutritional deficiencies

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