Gastric Bypass

The by-pass works much as the name implies. A portion of the stomach is by-passed thus accomplishing two results:


  • The physical capacity of the stomach is reduced. The result is that the patient feels satisfied (‘full’) after eating smaller portions of food than before.The area of the digestive system that is available to absorb digested food is physically less, thus less food gets into the system that might otherwise have resulted in adding to fat deposits.
  • Research has shown that this approach has an interesting and dramatic effect on diabetes, including helpful changes in certain hormones produced in the digestive system that affect appetite and the metabolism of sugars and fats.

The bypass approach is, therefore, very effective for a variety of reasons.

The advantages of the Bypass approach:

  • The Gastric Bypass is more effective on weight loss than the band and sleeve approaches.
  • Bypass has a positive impact on treating Type II Diabetes within just weeks of the procedure. ALSO, this particular (Bypass) procedure brings about changes in hormone profiles and, in turn glycaemic control (blood sugar) better than would be expected based on weight loss alone. The improvement in metabolic control following a bypass procedure is much greater than the degree of weight loss alone would be expected to achieve.
  • This approach is highly effective in reducing Hypertension (high blood pressure)
  • The Bypass technique is highly effective in reducing sleep apnoea
  • The results are achieved more quickly, typically with most of the weight lost being accomplished within 18 months, compared with 2 or 3 years with the other approaches.
  • The procedure is reversible if wished

We also offer the Gastric Bypass approach using Robotic Surgery.

See the other techniques listed here and also the Comparison of Techniques page.


Next: Gastric Band




  • Rubino F, Forgione A, Cummings DE, Vix M, Gnuli D, Mingrone G, Castagneto M, Marescaux J. The mechanism of diabetes control after gastrointestinal bypass surgery reveals a role of the proximal small intestine in the pathophysiology of type 2 diabetes. Ann Surg. 2006;244:741-749.
  • Rubino F, Gagner M. Potential of surgery for curing type 2 diabetes mellitus. Ann Surg. 2002;236:554-559.
  • Lee WJ, Chong K, Chen CY, Chen SC, Lee YC, Ser KH, Chuang LM. Diabetes remission and insulin secretion after gastric bypass in patients with body mass index > 35 kg/m2. Obes Surg. 2011;21:889-895.
  • Arterburn DE, Courcoulas AP. Bariatric surgery for obesity and metabolic conditions in adults .BMJ. 2014 Aug 27;349