Your Guide to the Different Types of Weight Loss Surgery: Perth Weight Loss and Surgery

19 September 2019

Confused about the weight loss surgery choices that may be available to you? Mr Siva Gounder is an experienced Perth bariatric surgeon with experience in a number of effective weight loss procedures.

Our guide to the different types of weight loss surgery will help to demystify your options.

To find out if you qualify for bariatric surgery start by checking your BMI, or book a consultation with Mr Gounder.

Lap Band Surgery

An adjustable gastric band (commonly called a lap band) containing an inflatable pouch is surgically placed around the top of the stomach. After lap band surgery the pouch is inflated or deflated according to the individual’s needs via a ‘port’ in the lower abdomen.

How does it work?

Gastric bands promote the sensation of feeling full by restricting the stomach size, therefore limiting food intake. They do not reduce calorie or nutrient absorption.

Gastric bands are adjustable to suit the individual’s weight loss targets. Most patients see around 40% excess weight loss from adjustable gastric band surgery.

Who can benefit from lap band surgery?

Adjustable gastric bands are approved for people with a BMI over 35, or over 30 with special conditions such as obesity-related illness. Despite its popularity as a weight loss surgery there has been a decline in the instances of gastric band surgery in recent years due to the 15-30% occurrence of revisional bariatric surgery.

Gastric Bypass Surgery

Gastric bypass procedures partition the stomach, attaching a portion of the small intestine to the new smaller stomach pouch. There are two types of gastric bypass surgery:

  • Roux-en-Y or RYGB: The small pouch at the top of the stomach is the only part which receives food, limiting the amount the individual can eat or drink. RYGB is classified by two connections – one from the small pouch to the relocated portion of small intestine, and another from the lower part of the stomach to the small intestine proper.
  • Single anastomosis gastric bypass or mini gastric bypass: Only one connection (anastomosis) is made, unlike RYGB. The smaller stomach pouch is connected to the small intestine, bypassing up to 200cm of upper small intestine.

How does it work?

Gastric bypass surgery uses a combination of limited food intake and reduced nutrient absorption (malabsorption) for effective weight loss. Food bypasses most of the stomach and small intestine, meaning the body absorbs less calories. The bypassed sections are still connected however for digestive juices to enter the lower part of the intestinal tract.

Who can benefit from gastric bypass surgery?

Individuals with a BMI over 35 generally benefit from up to 90% excess weight loss. Comorbidities like diabetes and reflux are also brought under control and less than 5% of patients require revision surgeries.

Gastric bypasses are difficult to reverse although a qualified surgeon may do so for medical reasons.

Gastric Sleeve Surgery

Sleeve gastrectomy reduces the stomach to around 15% of its original size in an effective, though permanent and irreversible, procedure. The curved part of the stomach is removed during keyhole bariatric surgery creating a tube or “sleeve”.

How does it work?

The reduced stomach cannot hold as much food, and production of the appetite-inducing hormone ghrelin is also reduced. Without limiting caloric or nutritional absorption, gastric sleeve surgery greatly reduces appetite for long-term weight loss.

Who can benefit from gastric sleeve surgery?

Because gastric sleeve procedures are irreversible this weight loss surgery is suitable for morbidly obese individuals with a BMI over 35. However, BMIs over 30 may be considered suitable if the individual is facing obesity-related health problems such as diabetes.

SADI-S/SIPS Procedure

Single anastomosis duodeno-ileal switch (SADI-S) or Stomach Intestine Sparing Surgery (SIPS) combines gastric sleeve surgery with intestinal rerouting. Starting with a gastric sleeve procedure, the surgeon then bypasses a section of the intestine without relocating it as in duodenal switch weight loss surgery.

How it works

SIPS triggers malabsorption as a result of bypassing a section of the intestine. Combined with a lower appetite thanks to reducing the stomach by two-thirds, SIPS promotes effective long-term weight loss. With the right post-surgery lifestyle changes individuals can experience up to 80-90% excess weight loss.

Who can benefit from SIPS?

SIPS can be an effective bariatric surgery option for individuals with a BMI over 35. This relatively new procedure is having positive effects for people battling obesity and related health problems through a combination of malabsorption and greatly reduced food intake.

Revisional Conversion Bariatric Surgery

Revisional bariatric surgery alters the type of weight loss method, normally from lap band to a gastric sleeve procedure or a sleeve gastrectomy to gastric bypass. Typically, patients will undergo revisional weight loss surgery due to weight gain or complications with the initial bariatric  surgery.

How it works

The initial procedure like gastric banding is removed and non-reversible procedure such as gastric sleeve or SIPS is carried out. Long term outcomes are then dictated by the type of surgery and the individual’s lifestyle adjustments post-surgery.

Who can benefit from revisional bariatric surgery?

Patients who have experienced weight gain or other complications after gastric banding surgery or reflux from sleeve gastrectomy may find alternative procedures more effective. Consultation and careful selection of surgery such as sleeve gastrectomy, gastric bypass or SADI-S/SIPS  is required before undertaking revisional surgery.

Suggested Articles

07 December 2023

Weight loss surgery can be a life-changing decision, beginning a transformative journey towards a healthier you. If you’re considering weight loss surgery in Perth, you’re not alone in your pursuit of a healthier future. At Perth Weight Loss and Surgery, we’re here to guide you through every step of this important process.   Step 1: […]

17 November 2023

When deciding on weight loss surgery options, the debate between gastric sleeve vs bypass is a frequent one. Both of these surgeries have their own set of advantages and disadvantages. The right choice varies depending on individual needs, health conditions, and desired outcomes.   Gastric Sleeve Surgery: Gastric sleeve surgery, known scientifically as laparoscopic sleeve […]

12 October 2023

In a society where most people struggle with weight challenge, ranging from being slightly overweight to morbidly obese, new hope is emerging on the Artificial Intelligence (AI) horizon.   The hotly contested AI realm is unveiling its potential as a supportive ally in an individual’s health journey, promising an empathetic and nuanced approach to weight management.  […]

Go to all articles