To start off, the mini gastric bypass works by creating a small stomach pouch (about 1/20-30cc). This pouch, known as the stoma, is connected to the small intestine where food and digestive juices are separated for the first 3 to 5 feet. The RNY significantly restricts the volume of food that can be eaten.
In duodenal switch surgery, a vertical sleeve-shaped stomach pouch is created (about 4-5 oz or 120-150cc) by removing 70% of the stomach size. The duodenum (first portion of the small intestine) is attached to the last 6 feet of the small intestine, where food and digestive juices are rejoined after 12 feet. Moderate restriction of the volume of food that can eat. Provides moderate malabsorption of fat, which can cause bloating and diarrhea.
Changes to Intestine (Single vs Double Anastomosis)
Mini Gastric Bypass = Single Anastomosis: The stomach uses a single connection to the small intestine, known as single anastomosis.
Duodenal Switch = Double Anastomosis: New stomach is “switched,” to the last 6 feet of the small intestines around to alter the digestion process and limit food absorption. Uses double anastomosis, or connections to the small intestines.
The mini bypass is less complicated because of only one single connection to the intestines. The new stomach will hold between 4-6 ounces of food instead of an average of 40 ounces. Patients maintained a 65% loss of excess body weight 2 years after mini-gastric bypass surgery. Unfortunately, this procedure is newer with less long-term weight loss data.
The duodenal switch efficacy is effective for patients with a BMI of > 50kg/m2. Those with a BMI of <45kg/m2 may lose too much weight. It does have a higher incidence of complications than any other weight loss surgery. Two years after surgery, patients maintained a 79% loss of excess body weight. 9% (at 1 year) and 6% (at 2 years) of patients had failed to lose at least 50% of their excess weight.
- Highest Amount of Excess Weight Loss (%EWL) – Duodenal Switch Surgery (DS)
- Less Invasive Surgery – Mini Gastric Bypass Surgery (MGB)
- Low Complication Rate – Mini Gastric Bypass Surgery
- Less Number of Potential Side Effects – Mini Gastric Bypass Surgery
- Lowest Cost of Procedure – Mini Gastric Bypass Surgery in Tijuana, Mexico
- Highest Reduction in Comorbidities and Health-Related Problems – Duodenal Switch Surgery (DS)
- Most Popular Surgery: Mini Gastric Bypass Surgery (MGB) as of now