Preparing for Gastric Sleeve Surgery in Sydney: What To Expect

If you're considering gastric sleeve surgery in Sydney, you're joining thousands of Australians who have chosen this proven path to lasting weight loss. Recent statistics show that 66% of Australian adults are classified as overweight or obese, and for many, this minimally invasive procedure offers a powerful solution. Will this be the change that will help you achieve your health goals? (1)

The journey to successful gastric sleeve surgery starts well before the operation itself. From pre-surgery dietary changes to organising your recovery time, good preparation can make a significant difference in your results.

Everything you learn now will build your confidence for the transformative weeks ahead. Here's what you need to know about preparing for your gastric sleeve surgery in Sydney.

The Procedure and Eligibility

A sleeve gastrectomy, commonly known as gastric sleeve surgery, is a procedure where surgeons remove approximately 80% of the stomach. The remaining portion forms a slim, banana-shaped pouch that not only restricts food consumption but also decreases the production of ghrelin, a hormone responsible for triggering hunger. Healthcare providers generally recommend this surgery for individuals whose BMI exceeds 35, though patients with a BMI above 30 may also qualify if they have weight-related health conditions such as type 2 diabetes or sleep apnoea. (2)

The procedure itself takes 60–90 minutes under general anaesthesia, using keyhole incisions for minimal scarring. While complication rates are low, the surgery is irreversible, making pre-operative education critical. For more detailed information about the procedure, you can read about gastric sleeve surgery at https://bodyfree.com.au/gastric-sleeve/ or other reputable sources.

Pre-Surgery Medical Evaluations and Lifestyle Adjustments

Your journey begins with comprehensive medical assessments. Expect blood tests, electrocardiograms (ECGs), and nutritional screenings to identify deficiencies in iron, vitamin B12, or calcium – common in obesity and exacerbated post-surgery. Psychological evaluations are equally vital, as long-term success depends on your ability to adopt new eating habits and cope with emotional triggers.

Smokers must quit at least one month before surgery to reduce infection risks and improve healing – a non-negotiable step enforced by most surgeons. You’ll also start a two-week pre-operative diet, often involving low-calorie diets (LCD), to shrink your liver and reduce surgical risks. One study revealed that LCD was effective in the reduction of liver volume by 12% to 27%. (3)

Dietary Changes Before and After Surgery

Your relationship with food will change dramatically. In the weeks leading up to surgery, prioritise protein-rich, low-carb meals to acclimatise your body to smaller portions. Post-surgery, you’ll follow a strict four-phase diet:

Liquids only (1–2 weeks): Broths, diluted juices, and protein shakes
Puréed foods (2–4 weeks): Blended soups, yoghurt, and mashed vegetables
Soft foods (4–6 weeks): Scrambled eggs, flaky fish, and steamed vegetables
Solid foods (6+ weeks): Small, nutrient-dense meals focusing on lean proteins (4)

Portion control is non-negotiable. Skipping meals or overeating risks stretching the sleeve or causing nausea. You’ll also need lifelong vitamin supplements to counteract reduced nutrient absorption, particularly B12, iron, and calcium.

Mental and Emotional Preparation

Weight loss surgery is more than just a physical transformation - it requires a significant shift in your mindset and relationship with food. Many clinics recognise this journey and provide behavioural coaching to help you address emotional eating patterns and build new, sustainable, and healthy eating habits that support your long-term success.

While patients typically experience rapid weight loss in the first year (often called the "honeymoon period"), maintaining these results requires ongoing commitment. One study shows that 20-25% of patients may regain some weight after five years, usually due to reverting to old eating habits or unaddressed emotional factors. (5)

This is why building a strong support network is crucial. Whether through your clinic's aftercare programs or local support groups, having people who understand your weight loss journey can make a significant difference in maintaining your progress.

What To Expect on Surgery Day

Your surgery day begins with arriving at the hospital while fasting - this means no food or drinks after midnight the previous day. During the procedure, your surgeon will make several small incisions (about ½ inch long) in your abdomen to perform the laparoscopic surgery. Most patients stay in the hospital for two to three days during their initial recovery. (2)

In those first few days, you might experience some shoulder pain from the gas used during surgery, and feeling tired is completely normal. Your medical team will provide painkillers to keep you comfortable.

You'll start by sipping small amounts of water within hours after surgery to test how your new stomach handles fluids. Important note: carbonated drinks should be permanently avoided as they can stretch your sleeve. It's also best to skip caffeine for the first month to prevent dehydration.

Key Takeaway

Preparing for gastric sleeve surgery demands commitment beyond the operating theatre. From pre-operative diets to lifelong dietary adjustments, success hinges on embracing holistic change. By partnering with experienced clinics and prioritising aftercare, you’ll transform not just your body but your relationship with health itself.

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