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General Features

  • It is a combined restrictive and malabsorptive procedure.
  • It has a single anastomosis between the stomach and the small bowel.
  • Its malabsorptive effect is more prominent.
  • It is also known as the single anastomosis gastric bypass or the omega loop gastric bypass

Mini Gastrik Bypass Operasyonu

Just as in the case of a RNY Gastric Bypass operation, the stomach is divided into two parts. The difference with RNY Gastric Bypass is that the small bowel is connected to the stomach without dividing the small bowel. By doing like this, the procedure consists of a single anastomosis.

Bypassing a longer segment of the small bowel tract (than the RNY Gastric Bypass operation) causes more malabsorption.

The main disadvantage is that bile can directly enter the stomach (or even in the esophagus). Chronic bile reflux could be associated with an elevated risk of malignancy and is the reason Mini Gastric Bypass is still not officially approved in the USA.

Based on scientific research, weight loss in our patients occurs as follows.

*  AT 6 WEEKS: From the initial weight         -%10
*  AT 3 MONTHS: From the initial weight         -%15
*  AT 6 MONTHS: From the initial weight         -%20 - 25
*  AT 9 MONTHS: From the initial weight         -%25 - 30
*  AT 12 MONTHS: From the initial weight         -%35 - 40
These numbers may vary depending on the eating, drinking and exercising habits of the patient..


Short term Long term
Leakage  Anastomotic ulcer
Bleeding  Intestinal Obstruction
Respiratory Infection Incisional hernia
Incisional hernia  
Wound infection  

Advantages of Mini Gastric Bypass (MGB)

Disadvantages of Mini Gastric Bypass (MGB)

  • Reversible procedure
  • Patients with reflux should avoid this procedure while bile reflux is often seen in these patients
  • More pronounced malabsorption
  • High rates of stomach ulcer and esophagus irritation (esophagitis)
  • Easier technique than the classic RNY Gastric Bypass for the surgeon
  • Lifelong multivitamin requirement
  • Prominent treatment for type 2 diabetes and other comorbidities
  • Lower weight regain risk.
  • No "only-liquid-food" period postoperatively