One Anastomosis Gastric Bypass (OAGB)

This procedure was traditionally carried out by a Roux-Y procedure where the stomach and intestine are reconnected in two places. A one anastomosis gastric bypass is a modification that simplifies this procedure, reducing operating time and complications both early and late.

SURGICAL PROCEDURE:

Laparoscopic, 5 small incisions
Less than one hour

The gastric pouch is constructed similar to a sleeve gastrectomy but not as long. The small bowel is then measured 150-200cm downstream and joined to the end of the gastric pouch.

ADVANTAGES:

• Laparoscopic procedure “keyhole surgery” so less invasive
• Limits the amount of food ingested and also the calories absorbed
• Increases intestinal production of GLP1 which stimulates insulin release and is more potent for diabetes cure
• Ability to eat bread and meat is a little easier
• A little more weight loss than sleeve
• Potentially reversible

DISADVANTAGES:

• Vitamin and trace element deficiency
• Intolerance to certain foods
• Dumping syndrome
• Requires a lifelong multivitamin
• Bile reflux, though rare

RECOMMENDED FOR PATIENTS WITH:

• High BMI >45
• Diabetes
• Severe reflux
• Prior gastric banding
• Patient preference

RECOVERY:

After one anastomosis gastric bypass surgery:

• you will stay in hospital for 1 night
• you will have pain relieving medications to keep you comfortable
• you will be given instructions to follow regarding wound care, diet and activity
• you will take Somac or Nexium for 3 months and then stop if reflux free

Patients should:

• Keep the incision area clean and dry
• Avoid strenuous exercises and lifting heavy weights for 2 weeks
• Sip water throughout the day to prevent dehydration
• Follow the diet regimen given to you by the dietitian
• Follow a weight loss exercise program to maintain weight loss

POSSIBLE COMPLICATIONS:

• Lifelong follow up with a physician is required for blood tests to ensure proper health and nutrition
• Bowel leak through the anastomosis (surgical joins)
• Gallstones
• Dumping syndrome – meals flood the intestine causing dizziness, nausea and diarrhoea
• Nausea
• Dehydration
• Indigestion
• Reactive hypoglycaemia
• Nutrient deficiencies
• Incisional hernia
• Wound infections
• Marginal ulcers
• Stomal stenosis
• Haemorrhage
• Infection
• Bleeding
• Bile reflux
• Venous thromboembolism

Learn more about the cost of each procedure