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Weight Loss Surgeries Explained: Mini Gastric Bypass or Omega Loop

Because of developments in laparoscopic (“keyhole”) surgery, MGBP has started to come back into fashion and is being promoted as a quick and effective alternative to standard gastric bypass. This type of weight loss surgery is chosen when patients are morbidly Obese

How Does Mini Gastric Bypass Differ from the Standard Gastric Bypass?

The main difference between the standard Gastric Bypass surgery and the Mini Gastric Bypass is that in the Omega Loop Gastric Bypass there is only one anastomosis between the new stomach and the bowel bypass point. In the standard Gastric Bypass procedure, there are two – an upper and a lower anastomosis. Because of this, the MGBP can be completed in less time than the RYGBP and – at least theoretically – with fewer early complications.
Because the stomach pouch is created on the lower curvature of the stomach and there is only one anastomosis, the procedure is also easily reversible if needed, unlike the standard Gastric Bypass.
When it comes to weight loss results, studies show that weight loss and health benefits resulting from mini gastric bypass are essentially the same as results seen from the standard Roux-en-Y Gastric Bypass.

How does the Mini Gastric Bypass or Omega Loop surgery work?

As with the standard Roux-en-Y gastric bypass (RYGBP) the Omega Loop mini gastric bypass (MGBP) works both by restricting the amount of food that can be eaten at any one time, and by altering gut hormones involved in appetite control.
In the first part of mini gastric bypass surgery the stomach is divided and a small tube of stomach created which becomes the pouch. This is the restrictive part of the procedure and means that only a very small amount of food can be taken at any one time.

Next, the surgeon brings up a loop of bowel (between 150-200cm long) and joins this to the lower part of the stomach pouch.  (The joining of bowel to bowel, or stomach to bowel is called an “anastamosis”).  This means that food passes from the small pouch into the small bowel where it meets the digestive juices which have moved downwards from the main part of the stomach. In effect, therefore, about 2m of small bowel has been bypassed before absorption of food (and calories) can take place.  Fewer calories absorbed, means weight loss.

Things to know about the Mini Gastric Bypass (Mini Bypass, Omega Loop)

  1. The Mini Gastric Bypass is always performed under general anesthesia and laparoscopically. 
  2. You stay for 2 to 3 nights in the hospital. As noted before: this procedure is reversible!
  3. Duration of surgery is approx. 90 minutes.
  4. Experience shows that, over the first two years after surgery, it is possible to lose 50% - 70% of the excess weight.
  5. A good operation for diabetics. Patient following surgery show immediate improvement of their diabetes, some coming off insulin within a few days post-surgery.
  6. Supplements will be needed lifelong.
  7. Produces significant malabsorbtion to Iron and calcium.
  8. Dumping syndrome is less common than Gastric Bypass.
  9. Reflux may be a problem in 5-10% of patients.
  10. Recovery takes approximately 6 weeks, sometimes one must take much (liquid) easily digestible food or a liquid diet in the first weeks. Like our 3 in 1 Multivitamins with calcium or our 4 in 1 Multivitamin with calcium and protein. See all liquid bariatric vitamins.

    Read more about Mini Gastric Bypass Vitamins