lap mini gastric bypass

What is a Mini Gastric Bypass?

The mini gastric bypass surgery is what its name suggests: a scaled-down, miniature version of the traditional gastric bypass surgery. The difference in the actual surgery is that with mini gastric bypass, the procedure is laparoscopic and reversible. Instead of a small pouch that is created with Roux-en-Y gastric bypass, the mini gastric bypass procedure creates a narrow tube that is attached to the small intestine, approximately six feet from its starting point, a placement that bypasses the highly absorptive section of the intestine.

Medical Description

Mini gastric bypass (MGBP) works both by restricting the amount of food that can be eaten at any one time, and by altering the gut hormones involved in appetite control. In the first part of the mini gastric bypass surgery, the stomach is divided by creating a small tube of stomach, which becomes the pouch. This is the restrictive part of the procedure, which means that only a very small amount of food can be eaten at any one time. Next, the surgeon brings up a loop of bowel (about 200cm long) and joins this to the lower part of the stomach pouch. The 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 other words, about 2m of small bowel has been bypassed before the absorption of food, and calories, take place.

Conditions for Surgical Qualification

Efforts to lose weight with diet and exercise have been unsuccessful
Your body mass index (or BMI) is 40 or higher
Your BMI is 35 to 39.9, and you have a serious weight-related health problem, such as: Type 2 Diabetes, hypertension, or severe sleep apnea.


Mini gastric bypass surgery is a simplified form of gastric bypass surgery, which is becoming popular now. This procedure is shorter, more easily performed, and has a lower risk of complications compared to the standard gastric bypass surgery—which is one of the commonly performed weight loss surgeries.


Minor complications

  • Bleeding from skin incisions
  • Nausea and vomiting
  • Diarrhea

Serious complications

  • Leaks, abscess, and infection
  • Deep vein thrombosis (DVT)
  • Pulmonary embolism
  • Death

Long-term complications

  • Vitamin and mineral deficiencies
  • Bone loss
  • Abdominal wall hernia
  • Inadequate weight loss