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Saturday 24 August 2019
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Bariatric Operations - Gastric Bypass

Gastric bypass surgery (the Roux-en-Y gastric bypass) is performed under general anesthesia using keyhole (laparoscopic) surgery. Using surgical staples the surgeon will create a small pouch from the upper stomach, partitioning it from the lower part of your stomach. The stomach pouch is then connected directly to the middle portion of the small intestine (jejunum), bypassing the rest of the stomach and the upper portion of the small intestine (duodenum). Very rarely a drain is inserted to stop fluid from collecting inside your abdomen.

 

In addition to reducing the capacity of the stomach, which restricts the amount you can eat and reduces your appetite, gastric bypass surgery reduces calorie absorption as food bypasses the rest of the stomach and the upper part of the small intestine. It also causes dumping syndrome (feeling dizzy and lightheaded if you eat too much carbohydrates or sweets due to food high in sugar passes quickly from the stomach pouch into the remaining small intestine) that will deter from food overindulgence.

 

What are the benefits of gastric bypass surgery?

  • Considerable and durable weight loss up to 65-75% of excess body weight within 12-18 months
  • Marked improvement or resolution in health conditions related to obesity, particularly type-2 diabetes (approximately 80-85% chance of resolution), hypertension (60-75% chance of resolution), gastro-oesophageal reflux, obstructive sleep apnoea (90% chance of resolution), asthma, polycystic ovary syndrome (PCOS) and associated infertility, liver disease, high cholesterol, and painful osteoarthritis
  • Improvement in overall physical and psychological health
  • In addition to this, gastric bypass surgery can improve the control of type 2 diabetes immediately by encouraging changes in the production of sugar lowering hormones that your body make

 

What are the risks of gastric bypass surgery?

As with any surgical operations there are associated short and long-term complications such as internal bleeding, anastomosis leakage, blood clot in the legs (deep vein thrombosis; DVT), blood clot in the lung (pulmonary embolism), infection, malabsorption of vitamins and micronutrients (which may lead to anemia, weakness, osteoporosis and neurological problems), internal bowel hernia (less than 1%), ulcer perforation (0.8%), and weight regain.