Gastroenterology Education and CPD for trainees and specialists » Roux-en-Y gastric bypass https://www.gastrotraining.com Largest online gastroenterology, hepatology and endoscopy education and training resource with histology, x-ray images, videos, gastro calculators, and MCQs. Thu, 04 Dec 2025 21:29:42 +0000 en-US hourly 1 http://wordpress.org/?v= Roux-en-Y Gastric bypass https://www.gastrotraining.com/gi-surgery/bariatric-surgery/roux-en-y-gastric-bypass/roux-en-y-gastric-bypass https://www.gastrotraining.com/gi-surgery/bariatric-surgery/roux-en-y-gastric-bypass/roux-en-y-gastric-bypass#comments Fri, 27 Aug 2010 08:41:01 +0000 Gastro Training http://www.gastrotraining.com/?p=3951 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
Technique
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

Advantages

  • 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

Disadvantages

  • 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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