Weight Loss Surgeon Perth

Single Anastomosis Stomach–Ileal Bypass with Sleeve Gastrectomy (SASI-S)

SASI-S (Single Anastomosis Stomach–Ileal Bypass with Sleeve Gastrectomy) is a modified and safer version of SADI-S (Single Anastomosis Duodenal–Ileal Bypass with Sleeve Gastrectomy). SASI-S combines the benefits of sleeve gastrectomy and intestinal bypass.


Sleeve gastrectomy removes 75% of the stomach resulting in a reduced capacity to eat and a reduced level of ghrelin, the hormone which causes hunger. Intestinal bypass involves joining the bottom part of the stomach (antrum) to the lower part of the small bowel (ileum).


This results in food bypassing part of the small intestine which causes a reduction in the absorption of fats, sugar and calories that are consumed. The amount of small bowel bypassed can be varied depending on the desired weight loss.


According to studies, the SASI-S procedure is able to provide greater weight loss than either a standard sleeve gastrectomy or gastric bypass procedure. SASI-S is safer than SADI-S due to fewer staple lines and only one join, so less risk of an internal hernia. SASI-S has fewer nutritional deficiencies such as iron as the duodenum is not excluded. Endoscopy to check on the stomach and duodenum is possible after SASI-S, the only bypass to allow this.

Losing Weight After Surgery

Surgery is just one tool to help you lose weight, you also need to follow a healthy diet and become physically active.

We consider your surgery as a tool that makes these changes easier. Learning how to eat healthier and incorporating regular exercise into your everyday life can be challenging, but the end results make the struggle worth it.

Patients who have undergone successful surgery not only look fitter, they have more energy, can engage in more activities, and are often able to resolve their co-morbid conditions.

Our Weight Loss Team

A dedicated team of individuals will make sure that you have the support and assistance you need while you recover from surgery and work towards your weight loss goals. The qualified and friendly professionals who can help you include:

  • Your doctor: who will monitor your progress and guide you as you recover and lose weight
  • A dietician: who will assist you as you adjust to a new, healthy diet by offering advice and preparing meal plans for you
  • An exercise physiologist: who will help you by developing a training program to stay physically active
  • A counsellor: who will oversee your mental and emotional health and offer support and guidance as you adapt to the big changes in your life

Weight Loss Care Program

Losing weight can be physically and mentally draining and every patient’s journey will be different. Dr Dolan offers a program designed to help you meet your weight loss goals.

The program covers the preoperative to postoperative needs of patients incorporating ongoing support along with a range of tools and resources. Patients are provided with:

  • Preoperative patient screening.
  • Information about how to achieve their weight loss goals.
  • Details about the procedure.
  • What to expect after the surgery.
  • Open communication between the patient, Dr Dolan surgeon and the bariatric support team.
  • A follow-up schedule to help monitor postoperative progress.
  • Dietary advice before and after surgery.
  • A recommended program for exercise.
  • Psychological counselling, if needed.

How does Dr Kevin Dolan perform the SASI-S procedure?

The SASI-S procedure is a two-step process: 1) Create sleeve gastrectomy and 2) Join the bottom part of the stomach (antrum) to the distal part of the small bowel (ileum). The length of the bypass can be varied depending on the desired weight loss.

Post-Surgical Care

Following your surgery, you will spend two days in the hospital and will be administered pain-controlling medications to keep you comfortable. For the first two weeks following your surgery, you will be kept on a liquid diet. Your surgeon and dietician will give you a specific diet plan and instructions to follow after this. It is important to drink plenty of fluids throughout the day to avoid dehydration.

What are the Costs and Funding Options for SASI-S Surgery?

Costs will vary from $0 to $6000 out of pocket expenses depending on the complexity of the surgery and your health insurance status. Dr Dolan will discuss costs at your first consultation.

Medicare rebates are available for this procedure and our surgery offers payment plans for patients. Speak to our team about these fees for more information. Alternatively, see below the uninsured fee breakdown for SASI-S Surgery.

Surgical Fee Breakdown

Total Cost *Uninsured: $20,000
Hospital fee $8000
Surgeon $6000
Equipment and consumables $3000
Anaesthetist $2000
Dietitian and surgeon follow-up appointments $1000

About Dr Kevin Dolan

Dr Dolan has been the Director and Head of Western Australia Laparoscopic and Obesity Surgery for patients with excess weight for over 20 years. Providing a long-term commitment to achieving and sustaining weight loss in conjunction with a team of bariatric physicians, dieticians, psychologist, exercise physiologists, nurse and patient support group.

You will meet Dr Dolan on your first visit to the clinic; he will carefully go through your medical history, explain your treatment options, and ensure you understand everything clearly.

If you are having one of our weight loss procedures, you will be closely supported by our whole team, not just around the time of your procedure, but for the months and years that follow. We will help you end the weight struggle- that’s our commitment to you.


  • Bachelor of Science (BSc) St Andrews University 1988
  • Bachelor of Medicine, Bachelor of Surgery (MB ChB) University of Manchester 1991
  • Fellow of the Royal College of Physicians and Surgeons of Glasgow (FRCPS) 1995
  • Fellow of the Royal College of Surgeons of Edinburgh (FRCS) 1995
  • Doctor of Medicine (MD) University of Manchester 1999
  • Intercollegiate Subspecialty Examination (FRCS, Upper GI) 2001
  • Fellow of the Royal Australasian College of Surgeons (FRACS) 2004

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Single Anastomosis Stomach–Ileal Bypass with Sleeve Gastrectomy (SASI-S)