Mini Gastric Bypass
MINI GASTRIC BYPASS (MGB)/ One Anastomosis Gastric Bypass (OAGB)
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What is it?
The mini gastric bypass is a restrictive and malabsorptive procedure that not only reduces food intake, but also reduces the absorption of carbohydrates and fats from the food. Usually 4-5 small cuts of 0.5 – 1 cm are made on the abdomen. In the first step of a Mini Gastric Bypass, a stomach sleeve is created measuring about 70-90 ml and separated from the rest of the stomach. The small intestine is then joint in continuity without disconnecting it. This bypasses a part of the intestine which reduces absorption of carbohydrates and fats.
How does a Mini Gastric Bypass help me lose weight?
In a Mini Gastric Bypass, the amount of food you can eat in one sitting is reduced because of the small stomach sleeve. Because of this, the brain utilizes the fat stored in your body for its energy needs. This burns the excess fat in your body, thus helping you lose weight.
The malabsorptive effect because of the bypass of the small intestine in a Mini Bypass is very strong. It leads to markedly reduced absorption of fats from your intestine. This contributes greatly to the weight loss effect.
Also, in a Mini Bypass, the production of the hunger hormone Ghrelin is reduced, since the fundus of the stomach is excluded. Because of this, you do not feel hungry all the time, and are satisfied with the small amount of food you eat without feeling tired or weak.
Does a Mini Gastric Bypass help with my medical diseases like Diabetes?
Of all weight loss surgeries, Mini Gastric Bypass is the one associated most strongly with complete reversal of Type II Diabetes Mellitus in 90-95% of patients for 10-15 years. This means, that almost 95% of patients who were diabetic can STOP all medications (including insulin) for Diabetes after undergoing a Mini Gastric Bypass. This occurs due to beneficial effect of the bypass of the small intestine that causes major changes in the hormonal axis of the body for better control of blood sugar levels.
In addition, after a Mini Gastric Bypass, marked improvement is seen in many other medical problems which are caused due to obesity, such as hypertension, sleep apnea, Hypothyroidism, Osteoarthritis, PCOS, etc. (similar to those seen in other weight loss surgeries). A reduction in body weight is the key mechanism behind this improvement.
Who can undergo Mini Gastric Bypass?
Anybody with a BMI of > 37.5 kg/m2 or >32 kg/m2 with medical diseases can undergo a Mini Gastric Bypass. It is very beneficial in:
- Super obese (BMI > 50 kg/m2)
- Patients with Diabetes Mellitus, Hypertension and other obesity – related diseases
- Sweet eaters
- Non vegetarians
- Previously failed weight loss surgery.
Are there any side effects of a Mini Gastric Bypass?
A few patients may have nutritional deficiencies post Mini Gastric Bypass, but these are easily preventable by taking regular multivitamin and multi mineral supplements as prescribed soon after surgery. These supplements may have to be taken lifelong, since the malabsorptive effect of the weight loss surgery persists for life.
In some patients, heartburn (or acidity) may become more pronounced. Hence we recommend routine use of antacids post surgery.
Can a Mini Gastric Bypass be reversed?
Yes, Mini Gastric Bypass is a completely reversible procedure. This requires a second surgery, which can again be performed by minimally invasive techniques (laparoscopically or robotically). It is a very complex surgery requiring a high degree of surgical skill and intensive post-operative care.
Quick Overview
- Pre Operative preparation
- Liquid diet (depending on your BMI)
- Pre Operative Tests
- Full body check-up
- Hospital stay
- 2-3 days
- Number of cuts (0.5-1 cm)
- 4-5 (Laparoscopy/ Robotics)
- Return to work
- In a week
- Expected Weight loss
- 80-90% of excess weight
