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Mini-Gastric Bypass
In this procedure, a long, narrow tube of the stomach is created, similar to a sleeve gastrectomy. Then, a loop of the small intestine is directly attached to this tube, bypassing a portion of the intestines and therefore reducing nutrient and calorie absorption. Unlike RYGB, which involves two intestinal connections (anastomoses), MGB uses only one—making the procedure quicker and potentially safer with fewer complications.
MGB has proven to be effective in achieving substantial weight loss, improving or resolving obesity-related health conditions like type 2 diabetes, hypertension, and high cholesterol. It is also known for its relatively easier reversibility or revision if needed.
MGB has proven to be effective in achieving substantial weight loss, improving or resolving obesity-related health conditions like type 2 diabetes, hypertension, and high cholesterol. It is also known for its relatively easier reversibility or revision if needed.
How Mini-Gastric Bypass is Performed
Mini-Gastric Bypass is typically performed laparoscopically, under general anesthesia, and takes about 60–90 minutes. Hospital stay is usually 1–2 days, and most patients recover within 2–3 weeks.
Procedure
- General anesthesia is administered, and several small incisions are made in the abdomen.
- A long, narrow pouch is created from the stomach using surgical staplers.
- A loop of the small intestine is brought up and connected to this stomach pouch, bypassing about 150–200 cm of intestine.
- The connection (single anastomosis) allows food to pass directly from the stomach pouch into the mid-intestine, skipping the rest of the stomach and upper small intestine.
- All instruments are removed, the incisions are closed, and the patient is monitored during recovery.
The key differences are in complexity and time. MGB involves only one intestinal connection instead of two, making it quicker to perform with potentially fewer complications such as internal hernias or leaks. MGB also tends to result in similar or even slightly better weight loss and diabetes remission rates. However, there may be a slightly higher risk of bile reflux, which can be managed or corrected if necessary.
As with all bariatric surgeries, significant lifestyle changes are essential for long-term success. Patients must follow a high-protein, low-sugar, low-fat diet and eat small, frequent meals. Lifelong vitamin and mineral supplementation (especially B12, iron, calcium, and vitamin D) is mandatory due to reduced absorption. Alcohol and smoking should be avoided, and regular physical activity is highly recommended. Regular follow-up with a bariatric team ensures sustained success and prevention of nutritional deficiencies.
Yes, MGB is considered safe when performed by an experienced surgeon. It has a lower complication rate compared to some other procedures due to its single anastomosis. It is also technically reversible, although reversal is rarely needed. If required, it can be revised to a traditional RYGB or sleeve gastrectomy in certain situations, such as severe bile reflux or inadequate weight loss.