One anastomosis gastric bypass
One anastomosis gastric bypass vs Roux-en-Y
Adelaide Bariatric Centre is able to offer two forms of gastric bypass surgery: Roux-en-Y bypass (RYGB) and one anastomosis gastric bypass (OAGB) also known as Omega Loop or ‘mini’ gastric bypass (MGB). Both of these procedures are performed laparoscopically or keyhole. Adelaide Bariatric Centre will advise as to which procedure is best suited to your needs, although in most cases Roux-en-Y gastric bypass is the preferred approach for the majority of our patients. In particular Roux-en-Y gastric bypass is the preferred bypass for revisional surgery.
Both RYGB and MGB surgery result in excellent weight loss and resolution of associated conditions such as type 2 diabetes. Roux -en-Y has published long term outcomes so remains our preferred form of gastric bypass. OAGB may however be a suitable form of bypass in certain patients.
Your surgeon at Adelaide Bariatric Centre will outline the advantages and disadvantages of each bypass during his consultation with you to ensure that the most appropriate form of bypass is performed for the individual.
Advantages of One anastomosis gastric bypass
- Simpler to perform technically
- Likely reduced risk of internal hernia
- Shorter operating time
- Easier to reverse
- OAGB is effective in treatment of type 2 diabetes
Disadvantages of One anastomosis gastric bypass
- The potential for bile reflux that may require reversal or revision of the OAGB to a standard Roux-en-Y gastric bypass
- Vitamin and mineral deficiencies: more small bowel is bypassed in OAGB, therefore nutritional deficiencies are more likely
- Poor published outcomes for OAGB as a revisional operation eg after gastric band or sleeve gastrectomy
- Long term data is not available for OAGB in comparison to Roux-en-Y gastric bypass