Weight loss surgery Perth

Rachel had weight loss surgery and lost 23kg in 5 months.

weight loss surgery perth

Weight loss

If you have struggled to achieve or maintain weight loss long-term, you may be considering weight loss surgery, also known as bariatric surgery. We offer different types of obesity surgery, depending on your situation, for the management of obesity and related conditions such as diabetes.

Here, we answer your biggest questions about the surgery, including potential weight loss, dumping syndrome, and insurance coverage.

weight loss surgery perth

What is weight loss surgery?

Weight loss surgery refers to a group of operations that result in losing weight to achieve a healthier life. Different weight loss surgery operations have been in use since the 1950s. Over time, they have evolved to become safer, more effective, and much better tolerated. The best weight loss results are achieved when good quality surgery is combined with a thorough follow-up support programme.

How much weight can I lose with bariatric surgery?

Results with weight loss surgery will vary from person to person. There are many factors that influence outcomes. On average, clients will lose around two-thirds of their excess weight. We find that with the minimizer ring we can push that figure up by another ten per cent, and with a tighter sleeve, maybe a bit further still.

So what surgery options are there?

We offer a full array of surgeries and procedures to help you lose weight, in order of popularity they are:

Video: Types of weight loss surgery

What factors influence weight loss?

Surgical technique

Every surgeon does their operation slightly differently. For sure, a tighter sleeve will cause more weight loss. If too much stomach is left behind, (ie a loose sleeve), the results will not be as good.


If someone from your family has done well with surgery, you will do well also. The amount of weight loss is heavily dependant on how the operation influences the gut hormones, and this is genetically controlled.


Many medications make you put on weight. (full list of medication that causes weight gain). Once we have done your surgery and you have recovered, it will be important to change any medications that make you put on weight to an alternative medication that does not cause (or has minimal) weight regain.

What you eat

Clearly if you stick to a healthy (lower calorie) diet you will do better than if you are eating calorie-dense foods like chocolate / junk food / alcohol / soft drinks. You are allowed to have these foods, but it’s all about moderating the quantity and frequency.

Have you had a prior gastric band?

Prior gastric bands limit the effectiveness of subsequent surgery, but we are not really sure why.

Theories why people with bands don’t do as well with subsequent surgery are:

  • Bands cause oesophageal stretch, facilitating the oesophagus to behave like a second stomach thereby allowing clients to eat more.

  • The possibility that the effectiveness of gut hormones is dampened by the prior band, and therefore the subsequent surgery doesn't have as much of a hormonal impact.

  • The quality of the subsequent surgery is impacted by the scarring caused by the prior gastric band.

  • That clients have learned to “cheat the surgery” and have developed bad habits. Clients with gastric bands often find softer, energy-dense foods are easier to consume and can fall into bad eating habits.

What is dumping syndrome in weight loss surgery?

This term is frequently overused. But true, dumping syndrome relates to what happens if sugar is allowed into the small intestine in large quantities. It happens in people that have had bypass operations, but may happen after sleeve gastrectomy as well. Dumping syndrome is said to occur in up to 50% of bypass patients and happens in stages.

Consuming a large amount of sugar that gets into the small bowel unchecked will result in the following:

Phase 1

The high concentration of sugar in the small intestine irritates the small bowel lining. The small bowel lining then starts to pour water into the small bowel to dilute the sugar. This means that water is moved out of the circulation into the bowel. This results in a fall in blood pressure, resulting in dizziness, palpitations, hypotension, sweating, headache, flushing, and disorientation. The feeling of needing to sit down. This often happens 15-30 minutes after eating a sugary meal.

Phase 2

The sugar gets absorbed, pushing the blood sugar very high.

Phase 3

In response to the high blood sugar there is a surge in insulin release, causing the blood sugar to fall to a very low level. This will cause headaches and fainting.

Phase 4

Late dumping occurs 2-3 hours after the meal. Unabsorbed sugar reaches the colon where bacteria ferment it, causing gassy diarrhoea.

How is dumping syndrome best treated?

  • Firstly, control diet, in particular by avoiding sugary foods in your diet.
  • Secondly, we have medications that can help.
  • Finally, it may be possible to undo the surgery and thereby, reduce the dumping.

How does weight loss surgery reverse diabetes?

The effect of weight loss surgery on diabetes is almost magical. Often clients find that their diabetes has gone into remission and they no longer require any medication.

We never say cured as diabetes seems to sit in the background. It may come back at a later time, but it can be in remission for as long as 10-20 years, and this is a major advantage to your long term health.

The way this happens is not known, but theories are:

  1. The hormonal effect of the surgery has a major influence on insulin production and insulin sensitivity.

  2. Reducing weight reduces insulin resistance, and this makes the available insulin work more effectively.

  3. Eating less means a lower carbohydrate load with meals, so the sugar load is not as great.

Weight loss surgery is most effective if done quickly after a diagnosis. If the diagnosis of diabetes was made less than two years prior to surgery, there is an 80% chance of getting off all diabetes medication. Often, if diabetes is improved and medication can be reduced, the progression to needing insulin less likely. But the effectiveness of the surgery diminishes in people who have had diabetes for longer periods of time.

We (and the Australian Diabetes Foundation) recommend having weight loss surgery as soon as possible after a diagnosis of diabetes is made.

Bypasses are slightly more effective in controlling diabetes, but they also have their drawbacks.

More details on bypasses

Can I get a second opinion?

Absolutely. We are very keen that you do so and we are happy to point you in the right direction. We belong to a group of bariatric surgeons in Perth that are both experienced and capable. A second opinion is always valuable, either to hear the same ideas from a different perspective or to get fresh eyes on a problem, and maybe some extra ideas. If you would like a second opinion just ask.

We are also happy to provide a second opinion on an existing problem. You’ll find that we have a few tricks up our sleeve.

Is obesity a disease or a risk factor?

This is the source of much debate amongst doctors, and a conclusive decision has not been reached yet. I feel that obesity is a syndrome, made up of different diseases and disease processes, that make you put on weight.

Figuring out what makes an individual person put on weight is hard, but important, as this is where the therapy needs to be targeted. Surgery will lower your weight, but it’s endpoint effectiveness relies on managing the other issues as well.

So what’s the big deal?

The terrible social stigma of being overweight and all the issues that that carries I believe are more important than what I’m about to tell you. Medically speaking, obesity is a risk factor for many diseases, and unfortunately, it will shorten your life expectancy. It’s when you look at the numbers that the truth becomes undeniable.

With a BMI of 40 or over your chance of reaching the age of 60 is 76%. That is a one in three chance of dying by the age of 60. This is why the government permits you to access the early release of money from your superannuation fund to cover the cost of your entire (or even only part of your) medical expenses related to your obesity surgery.

This is available to both privately insured and uninsured clients but is governed by some very strict guidelines (see below).

How do I access my superannuation to fund my surgery

You can access your superannuation fund to pay for just the out of pocket expenses or if uninsured all of the costs of the surgery. APRA (Australian Prudential Superannuation Authority) oversees the premature release of superannuation funds. The law states that superannuation funds may be released for:

Life-threatening conditions (causing death within twelve months)

Psychiatric conditions

Management of chronic pain - we prefer to use this option. Most people needing bariatric surgery have pain, Usually in their back, sometimes knees and hips and lots of other places. By losing weight and taking the load off these joints pain improves and this qualifies us to use this clause.

The administration of the early release of superannuation is performed by the Australian Taxation Office. They require a form to be completed, a letter from your GP and a letter from your surgeon. We recommend using a company called Supercare to help you process the paperwork. They are very helpful as they have a very good understanding of all the details necessary to make the process as smooth as possible. If you would rather attempt this yourselves our staff will be happy to guide you through the details as much as possible, but due to ATO privacy laws, we are unable to do the application for you.


Medical complications of obesity

weight loss surgery Perth

About Obesity Surgery WA: Our 6 commitments

Taking surgery seriously

We know that entering into an operation is a big deal and we are very serious in getting the best outcome for you. We practice what is considered to be a world class standard. Our staff regularly attend national and international conferences and bring back what is the latest research and technology.

Running on time

Our Surgeons and all of our staff try their best to run on time. Although it's not always possible, our commitment is that we do our best. Your time is valuable and we respect that.

Readily available

Our surgeons (or at least one of them) are always available in a crisis. Some of them may provide you with a direct contact, but all are available through the hospital switchboard and happy to chat any time if there is a crisis.

An obsessive attention to detail

We do our best to not miss anything. Every stitch, every staple and every clip is applied to exactly where it needs to be with the greatest care possible.

Commitment to performing the best operation possible

Not all operations are the same and there a few extras that we do to make things better. We know that our results are better with the minimiser ring so we offer it to everyone. We know that reflux can be an issue so we try to tighten every oesophageal hiatus to make reflux control as good as possibly can be.

A commitment to new technologies

  • We have brought in STRETTA into Western Australia, which we believe will revolutionise reflux management. (Have a look at the Stretta page for more information).

  • SJOG Murdoch has just purchased a new DaVinci robot and we believe that this will allow us to do operations with keyhole surgery that previously needed a major laparotomy incision. Lynx is on the horizon and promises to also help manage reflux, we hope to have access to this in early 2020.

Useful links


Laparoscopic Sleeve Gastrectomy is the most common bariatric operation performed in Australia to achieve weight loss. In the right hands, a well-constructed sleeve gastrectomy is a powerful and safe weight loss tool.
Gastric sleeve


Of all bariatric surgeries available, gastric bypass is probably the most well known. The newer version of the surgery is even more effective, and both bypasses are especially good as a revision surgery after a previous weight loss surgery.
Gastric bypass


The Roux-en-Y procedure is one of the best-understood bypass surgeries we have. However, as with all surgeries, there are important side effects to consider, including the resulting malabsorption of nutrients afterwards.
Roux en Y

Meet our team

Dr. Harsha Chandraratna

Dr. Harsha Chandraratna

Consultant Surgeon

Harsha was made a Fellow of the Royal Australasian College of Surgeons in 2001. He undertook post fellowship training in Perth and then in Leeds (UK) in Liver and Kidney Transplantation as well as Bariatric Surgery. He understands that there is more to surgery than just technical skills and hopefully that will become apparent to you when you meet him.
Dr. Bill Gong

Dr. Bill Gong

General and Laparoscopic Surgeon

Bill Gong is a specialist General Surgeon. He completed his training at The Alfred Hospital in Melbourne and obtained his Fellowship with the Royal Australasian College of Surgeons in 2014. In 2016, Dr Gong commenced private practice at St. John of God Hospital, joining Associate Professor Harsha Chandraratna.