Single Anastomosis
Gastric Bypass
Dr. Justin Greenslade’s practice offers a suite of advanced general surgical procedures tailored to your needs.
What is Single Anastomosis Gastric Bypass?
The Single Anastomosis Gastric Bypass (SAGB), sometimes referred to as the “mini-gastric bypass” or one anastomosis gastric bypass (OAGB), is a minimally invasive bariatric procedure designed to aid significant and sustained weight loss.
SAGB is generally less complex than the Roux-en-Y gastric bypass, involving fewer surgical steps and potentially shorter operating time. However, it may not be suitable for patients with acid reflux or GORD, as it can worsen these symptoms.
This procedure has been shown to help manage obesity-related conditions such as type 2 diabetes and hypertension while offering a technically simpler approach than traditional bypass methods.
How is it different from Roux-en-Y gastric bypass?
Choosing between SAGB and RYGB depends on the patient’s medical history, weight loss goals, and risk factors. Dr Greenslade will provide personalised recommendations to ensure the best outcomes.
In SAGB, there is only one connection (anastomosis) where the stomach pouch is joined to a loop of the small intestine. This makes it technically simpler and often shorter in operative time.
In RYGB, there are two connections: one between the stomach pouch and the small intestine and another where the bypassed small intestine is reconnected to the rest of the digestive tract.
SAGB uses a "loop" technique, where the small intestine is rerouted in a single loop for both food passage and digestive secretions.
RYGB divides the small intestine into two separate pathways—one for food and one for digestive secretions, which are joined further down the tract.
SAGB is simpler, with fewer steps, potentially leading to reduced operative time and lower risk of complications like leaks or strictures.
RYGB is more complex but has been a well-established standard for decades and is well-studied.
SAGB can create a greater degree of malabsorption, which might lead to slightly more weight loss but also a higher risk of nutrient deficiencies.
RYGB provides a balance between restriction and malabsorption, making it suitable for a wide range of patients.
SAGB has a higher risk of acid reflux, as the loop configuration can allow acid to flow back into the stomach or oesophagus. It is not recommended for patients who regularly suffer from reflux or GORD.
RYGB’s two-anastomosis structure prevents acid from coming into contact with the stomach pouch, significantly reducing this risk.
Both procedures support weight loss and help manage obesity-related conditions, but RYGB has a longer track record of success and extensive long-term data.
SAGB is gaining popularity due to its simplicity, but long-term comparative data are still being developed.
How does the Single Anastomosis Gastric Bypass work?
The surgery involves creating a small, tubular stomach pouch and connecting it directly to a loop of the small intestine, bypassing a portion of the digestive tract. This modification supports the reduction of calorie absorption and helps control hunger by altering gut hormones.
Start your weight loss surgery journey with Brisbane Bariatric Centre today
If you’re thinking about weight loss surgery or just want to know what’s possible, we’re here to help. Get in touch to book a chat with Dr Justin Greenslade and find out what’s right for you.
