How much of the stomach is removed in gastric sleeve surgery?

Approximately 75–80% of the stomach is removed during gastric sleeve surgery, leaving a narrow, sleeve-shaped stomach that holds significantly less food than before. This helps reduce meal portions and may decrease hunger by lowering ghrelin production. Because part of the stomach is permanently removed, gastric sleeve surgery is irreversible.

Am I eligible for gastric sleeve surgery?

Eligibility is generally based on a BMI of 40 or above, or a BMI between 35 and 39.9 with obesity-related conditions such as type 2 diabetes, sleep apnoea, or high blood pressure. In selected cases, patients with a BMI of 30 or above and significant metabolic disease may also be considered. Your eligibility also depends on your overall health, previous weight loss efforts, and readiness for long-term lifestyle changes.

How much does gastric sleeve surgery cost?

The cost depends on your private health insurance cover and individual circumstances. Patients with appropriate bariatric cover generally have lower out-of-pocket expenses after Medicare and health fund rebates, while self-funded patients pay the full cost of treatment. A personalised quote outlines all expected fees.

How long does the gastric sleeve procedure take?

The procedure usually takes between 1.5 and 2 hours and is performed laparoscopically under general anaesthetic using several small incisions. This minimally invasive approach generally results in less pain, smaller scars, and faster recovery than open surgery.

What is the hospital stay and recovery time after gastric sleeve surgery?

Most patients stay in hospital for one to two nights. Gentle walking usually begins on the day of surgery or the following day. Many people return to desk-based work within two to three weeks, while recovery continues over four to six weeks.

How do I prepare for gastric sleeve surgery?

Preparation usually includes a two-week pre-operative diet, blood tests, a gastroscopy (usually performed on the day of surgery to reduce costs), and an anaesthetic assessment. Some medications, including blood thinners, diabetes medicines, and GLP-1 weight loss injections, may need to be adjusted or temporarily stopped before surgery. Following the recommended preparation plan helps support a smoother surgical journey and can help you feel more confident before your operation.

How much weight will I lose after gastric sleeve surgery?

Many patients lose around 60–70% of their excess body weight within two years, with the fastest weight loss occurring during the first three to six months. Long-term success depends on healthy eating, regular exercise, and ongoing follow-up. Individual results vary.

What can I eat after gastric sleeve surgery?

Your diet progresses from clear liquids to full liquids, pureed foods, soft foods, and then a modified normal diet over approximately six to eight weeks. Protein should be prioritised at every meal, and your bariatric dietitian will provide personalised guidance.

When can I start exercising after gastric sleeve surgery?

Light walking is encouraged from the first day after surgery. More structured activities, such as cycling, swimming, and gym-based exercise, can usually begin after four to six weeks, once approved by your surgeon. Heavy lifting should be avoided during early recovery.

Do I need to take vitamins after gastric sleeve surgery?

Yes. Lifelong vitamin supplementation is generally recommended to help prevent nutritional deficiencies. Regular blood tests help ensure your supplements remain appropriate over time.

Can gastric sleeve surgery be reversed?

No. Gastric sleeve surgery is permanent because the removed portion of the stomach cannot be replaced. If additional treatment is needed, the sleeve can sometimes be converted to gastric bypass.

Can gastric sleeve surgery help with type 2 diabetes?

Yes. Gastric sleeve surgery can significantly improve type 2 diabetes for many patients, with some experiencing remission, particularly when surgery is performed earlier in the course of the condition. The most appropriate procedure depends on your individual health.

Gastric Sleeve Surgery

Gastric Sleeve Surgery Melbourne

Gastric sleeve surgery or vertical sleeve gastrectomy is one of the most commonly performed procedures in Australia and globally, and it is considered both safe and effective for people who need medical support in their weight management journey. According to health.gov.au, two in three Australian adults are living with overweight or obesity, which can lead to a range of health conditions and the need for obesity surgery. Gastric sleeve surgery in Melbourne can be an important option when other methods, such as lifestyle changes and medications, have not provided lasting results.

It is most commonly recommended for individuals who have not achieved sufficient results through lifestyle modifications and need a long-term, medically supervised solution. For suitable candidates, gastric sleeve surgery offers a clinically supported way to improve health outcomes, and it not only helps in reducing hunger and food intake but can also lead to improvements in health conditions such as type 2 diabetes, high blood pressure, sleep apnoea and joint pain.

We are committed to offering compassionate, minimally invasive care through laparoscopic sleeve surgery for those considering this transformative option. Under the expert care of Mr. Niruben Rajasagaram, our team offers a supportive, patient-focused approach to ensure optimal outcomes for each individual.

Book a weight loss consultation today

What is Gastric Sleeve Surgery?

Gastric sleeve surgery, or sleeve gastrectomy, is a minimally invasive weight loss surgery. During the surgery, around 75–80% of the stomach is carefully removed. The remaining stomach is reshaped into a narrow, tube-like “sleeve” which holds less food and produces fewer hunger hormones.

The surgery may positively influence other hormones such as:

Reduces the Hunger hormone “ghrelin”

This procedure has two key effects: it reduces appetite naturally, helping you feel full with smaller portions, and it lowers overall calorie intake in a gentle, sustainable way. Together, these changes support long-term weight management without the need for restrictive dieting.

At our weight loss centre gastric sleeve surgery Melbourne is performed using keyhole (laparoscopic) techniques, which allow for quicker recovery, less discomfort, and smaller incisions.

It is commonly recommended for patients with a Body Mass Index (BMI) over 35, or those with a BMI over 30 who also have health concerns.

Benefits of Considering Gastric Sleeve Surgery Near You

Significant & Sustainable Weight Loss

Gastric sleeve surgery is an effective procedure for achieving long-term weight loss. Reducing the size of the stomach and altering hunger-regulating hormones support positive results and significant improvements in overall health.Understanding the Connection Between Weight Loss and Fertility This procedure can provide a range of benefits for suitable candidates, including:

Helps patients lose 50–70% of excess body weight over 12–18 months, following the specific gastric sleeve weight loss timeline
Supports natural portion control by reducing stomach size
Decreases hunger hormone (ghrelin) levels, making it easier to manage cravings
Encourages sustainable weight loss without the need for restrictive dieting

Health Benefits Beyond Weight Loss

Losing weight through gastric sleeve stomach reduction surgery can improve or resolve many obesity-related health conditions.

Diabetes Remission

Improves blood glucose control in people with type 2 diabetes
Decreases or eliminates the need for insulin and diabetes medications
Early intervention can lead to complete diabetes remission

Improved Heart Health

Reduces high blood pressure and reliance on medications
Lowers LDL (bad) cholesterol and triglyceride levels
Improves overall cardiovascular function and reduces the risk of heart disease

Better Sleep

Alleviates symptoms of obstructive sleep apnoea (OSA)
Reduces snoring and improves oxygen levels during sleep
May reduce or eliminate the need for CPAP therapy

Joint Pain Relief

Eases pressure on weight-bearing joints like knees, hips, and lower back
Decreases joint inflammation and symptoms of osteoarthritis
Improves mobility, flexibility, and physical comfort during daily activities

Additional Health Benefits

Reduces the risk of certain cancers linked to obesity (bowel, breast, uterus)
Improves fertility and reproductive health in some women
Lowers the chances of developing fatty liver disease and gallstones
Supports a stronger immune system and healthier organ function

Psychological & Lifestyle Benefits

Improves self-esteem and body confidence
Supports better emotional balance and reduced mood swings
Makes routine tasks easier—walking, bending, climbing stairs, etc.
Increases motivation, productivity, and engagement in the workplace

Is Gastric Sleeve Surgery Right for You?

If you're exploring options for sleeve gastrectomy near you, this procedure may be suitable if you meet the following conditions:

Have a Body Mass Index (BMI) over 35
Have a BMI over 30 with related health conditions such as high blood pressure, type 2 diabetes, or sleep apnoea
Have tried other weight management strategies with limited success
Want a long-term, medically supported solution
Want to make healthy changes to support your results

Every individual is different, and deciding whether bariatric surgery, such as gastric bypass, sleeve gastrectomy, or adjustable gastric banding, is the right option involves a detailed consultation, medical assessment, and discussions about your goals, lifestyle, and health history.

The Gastric Sleeve Surgery Procedure

Initial Consultation & Assessment

Meet Mr. Niruben Rajasagaram to discuss goals
Review medical history and BMI
Identify weight-related health issues
Learn how the surgery works
Ask questions and assess suitability

Pre-Surgery Preparation

Get a customised pre-op plan
Complete blood tests and scans
Start liver-shrinking diet
See a dietitian and psychologist (if needed)
Discuss costs and set surgery date

Multidisciplinary Support & Planning

Meet surgeon, dietitian, and coach
Get lifestyle change guidance
Learn about recovery and outcomes
Access pre-surgery resources
Finalise date and checklist

Hospital Admission & Surgery Day

Arrive and meet the surgical team
Undergo keyhole (laparoscopic) surgery
75–80% of stomach removed
No intestines are bypassed
The procedure takes 60–90 minutes

Recovery Begins – Welcome to the New You!

Stay 1–2 nights post-surgery
Sip clear fluids under guidance
Receive pain relief and care
Start post-op liquid diet
Schedule follow-up visits

Post-Surgery Recovery at Home

Work closely with our habits and transformation coach to reshape the mindset
Get personalised food advice from your Bariatric Dietitian
Check in with the care team regularly
Track weight and health changes
Reach out if any issues arise

Risks & Potential Side Effects

As with any surgical procedure, there are some risks to consider. These may include:

Temporary discomfort, nausea, or changes in digestion
Reflux or heartburn
Low levels of certain nutrients (which can be managed with supplements and monitoring)
Rare risks such as infection or bleeding

These risks are discussed in detail during your weight loss surgery consultation at our centre in Melbourne. Each patient is supported with a clear recovery plan, regular follow-up care, and a team that’s available throughout the journey.

Bariatric Surgeries Approximately 900 surgeries performed, including gastric sleeve and gastric bypass surgeries

Gallbladder Surgeries Approximately 1,000 surgeries performed

Hernia Operations Approximately 500 surgeries performed

Hiatal Hernia Surgeries Approximately 600 surgeries performed

Patient Satisfaction Rate 98%

Extensive Surgical Experience with Personalised Patient Care

Mr. Niruben Rajasagaram has extensive surgical experience across bariatric, upper gastrointestinal and general surgery, with a focus on providing personalised care to every patient.

Every patient has different health needs, medical history, and treatment goals. Mr. Niruben Rajasagaram takes the time to understand each patient's circumstances, explain the recommended procedure clearly, and discuss what to expect throughout the surgical journey.

From the initial consultation through surgery and follow-up care, his approach focuses on patient safety, clear communication and personalised treatment, helping patients feel informed, supported and comfortable.

Book a Consultation Now

Personalised and Quality Care for All Patients

At our centre, we believe that bariatric surgery in Melbourne should be accessible to those who need it most. That’s why our elective surgery is suitable for both insured and self-funding patients. Whether you hold private health insurance or are funding the procedure yourself, we provide transparent pricing, flexible options, and exceptional care throughout your journey.

Send an enquiry online

Surgery Options

Please see below a list of some of the more common surgeries for Bariatric (Weight Loss), Upper Gastrointestinal (Hiatal Hernia & Anti Reflux) and General Surgery (Gall Bladder & Hernias) that Mr.Niruben currently performs.

Gastric Sleeve Surgery

Most common weight loss surgery done
Reduction of hunger hormone ”Ghrelin”

Gastric Bypass Surgery

A small stomach pouch is created
The small bowel is divided so that the first part of the bowel is by-passed, and the remainder of the small bowel is attached to the newly formed pouch

Laparoscopic Mini Gastric Bypass

The first step is to create a small stomach pouch
This is connected (anastomosed) to the intestine, bypassing between 1.5m to 2mof the part of the proximal intestine

Gastric Balloon

The Gastric Balloon is a soft, saline filled silicone balloon that is temporarily inserted into the stomach without surgery, giving you a feeling of fullness. It will make you feel less hungry and feel fuller more quickly after small meals

Revisional Bariatric Surgery

Gastric Sleeve to Roux En-y Gastric Bypass / Mini-gastric Bypass
Gastric Band to Roux En-y Gastric Bypass / Mini-gastric Bypass

Gastric Band Surgery

A form of weight loss surgery where a surgeon places a specialised band around the stomach
The band temporarily divides your stomach into two pouches, reducing its volume and helping you feel

Hiatal Hernia & Anti Reflux Surgery

The surgery fixes this and creates an anti-reflux effect (can have part of this done together with weight loss surgery)
No permanent Weight loss component

Gall bladder Surgery

Key hole / Laparoscopic
Average length of stay 1-2 nights
Performed for Privately insured & Self funding patients

Hernia Surgery

This is often done as key hole surgery with an overnight stay
Performed for privately insured and self funding patients

View all surgery options

Why Choose Us for Your Gastric Sleeve Surgery in Melbourne?

We focus on more than just surgery—we support you through every stage of your health journey including maintaining weight after gastric sleeve with expert care.

Here’s what sets us apart:

Personalised patient care from day one: Your health, goals, and comfort are at the heart of everything we do.
Skilled surgeon: Dr. Niruben Rajasagaram personally performs each procedure, ensuring consistency and the highest level of surgical expertise, including bariatric services such as gastric bypass, sleeve gastrectomy, and adjustable gastric banding.
Experienced team: Including a bariatric dietitian, habits & transformation coach, nurses, and admin staff—all focused on your success.
Flexible options for insured and self-funding patients: Transparent pricing and affordable packages, with no compromise on quality.
Pre- and post-surgery support customised to you: Nutritional advice, emotional guidance, and practical tips to help you adjust and thrive.
Clear communication and advice: We explain every step of the process for your better understanding, and we’re always here to answer your questions.
Long-term support that doesn’t stop at surgery: Our team is here to support you throughout your journey, helping you maintain your progress and stay healthy for life after gastric sleeve surgery Melbourne.

Our Happy Patients

Our patients’ experiences reflect the care, support, and outcomes they receive throughout their treatment journey. These testimonials share real stories about recovery, confidence, and improved quality of life, helping others understand what to expect from the process.

Thank you so much for changing my life. 8 weeks post op, down 16kg and haven’t had one bit of nausea or vomiting. Mr. Niruben’s bedside manner and skills are faultless.

Melissa Mitchell

I cannot thank Mr. Niruben enough. I was 107kg and now I am 63 kg. I’m a year post gastric sleeve, I’m living my best life feeling the best I’ve ever felt. Thank you Mr Niruben for saving me this surgery has changed my life around. I cannot fault Mr. Niruben or his team. They’ve been amazing anyone that goes to him You’re in the best hands.

Antonia Pollard

Mr Niruben and his team have been absolutely fantastic! Made me feel comfortable, supported and cared for before, during and after Gastric Sleeve Surgery. Would highly recommend.

Karla Acuna

View All Reviews

Melbourne Stories of Transformation with Gastric Sleeve Surgery

Hear directly from our Melbourne patients as they share their personal experiences with gastric sleeve surgery. These real stories reflect the life-changing results and support they received throughout their journey.

Frequently Asked Questions About Gastric Sleeve Surgery in Melbourne

HOW MUCH OF THE STOMACH IS REMOVED IN GASTRIC SLEEVE SURGERY?

Approximately 75–80% of the stomach is removed during gastric sleeve surgery, leaving a narrow, sleeve-shaped stomach that holds significantly less food than before. This helps reduce meal portions and may decrease hunger by lowering ghrelin production. Because part of the stomach is permanently removed, gastric sleeve surgery is irreversible.
AM I ELIGIBLE FOR GASTRIC SLEEVE SURGERY?

Eligibility is generally based on a BMI of 40 or above, or a BMI between 35 and 39.9 with obesity-related conditions such as type 2 diabetes, sleep apnoea, or high blood pressure. In selected cases, patients with a BMI of 30 or above and significant metabolic disease may also be considered. Your eligibility also depends on your overall health, previous weight loss efforts, and readiness for long-term lifestyle changes. You can learn more about the assessment criteria on our Eligibility for Gastric Sleeve Surgery page.
HOW MUCH DOES GASTRIC SLEEVE SURGERY COST?

The cost depends on your private health insurance cover and individual circumstances. Patients with appropriate bariatric cover generally have lower out-of-pocket expenses after Medicare and health fund rebates, while self-funded patients pay the full cost of treatment. A personalised quote outlines all expected fees. If you're planning for surgery, understanding what influences the overall cost of gastric sleeve surgery can help you prepare.
HOW LONG DOES THE GASTRIC SLEEVE PROCEDURE TAKE?

The procedure usually takes between 1.5 and 2 hours and is performed laparoscopically under general anaesthetic using several small incisions. This minimally invasive approach generally results in less pain, smaller scars, and faster recovery than open surgery.
WHAT IS THE HOSPITAL STAY AND RECOVERY TIME AFTER GASTRIC SLEEVE SURGERY?

Most patients stay in hospital for one to two nights. Gentle walking usually begins on the day of surgery or the following day. Many people return to desk-based work within two to three weeks, while recovery continues over four to six weeks.
HOW DO I PREPARE FOR GASTRIC SLEEVE SURGERY?

Preparation usually includes a two-week pre-operative diet, blood tests, a gastroscopy (usually performed on the day of surgery to reduce costs), and an anaesthetic assessment. Some medications, including blood thinners, diabetes medicines, and GLP-1 weight loss injections, may need to be adjusted or temporarily stopped before surgery. Following the recommended preparation plan helps support a smoother surgical journey, and understanding how to prepare for gastric sleeve surgery can help you feel more confident before your operation.
HOW MUCH WEIGHT WILL I LOSE AFTER GASTRIC SLEEVE SURGERY?

Many patients lose around 60–70% of their excess body weight within two years, with the fastest weight loss occurring during the first three to six months. Long-term success depends on healthy eating, regular exercise, and ongoing follow-up. Individual results vary.
WHAT CAN I EAT AFTER GASTRIC SLEEVE SURGERY?

Your diet progresses from clear liquids to full liquids, pureed foods, soft foods, and then a modified normal diet over approximately six to eight weeks. Protein should be prioritised at every meal, and your bariatric dietitian will provide personalised guidance.
WHEN CAN I START EXERCISING AFTER GASTRIC SLEEVE SURGERY?

Light walking is encouraged from the first day after surgery. More structured activities, such as cycling, swimming, and gym-based exercise, can usually begin after four to six weeks, once approved by your surgeon. Heavy lifting should be avoided during early recovery.
DO I NEED TO TAKE VITAMINS AFTER GASTRIC SLEEVE SURGERY?

Yes. Lifelong vitamin supplementation is generally recommended to help prevent nutritional deficiencies. Regular blood tests help ensure your supplements remain appropriate over time.
CAN GASTRIC SLEEVE SURGERY BE REVERSED?

No. Gastric sleeve surgery is permanent because the removed portion of the stomach cannot be replaced. If additional treatment is needed, the sleeve can sometimes be converted to gastric bypass.
CAN GASTRIC SLEEVE SURGERY HELP WITH TYPE 2 DIABETES?

Yes. Gastric sleeve surgery can significantly improve type 2 diabetes for many patients, with some experiencing remission, particularly when surgery is performed earlier in the course of the condition. The most appropriate procedure depends on your individual health.

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