Single Anastomosis Gastric Bypass
The single anastomosis gastric bypass, also called the omega loop or mini bypass, involves creating a small gastric pouch by dividing the stomach. Subsequently, a loop of the small bowel is bypassed and reconnected to the lower section of this newly formed gastric pouch. This procedure is effective for weight loss as it is both restrictive and malabsorptive.
Why consider a single anastomosis gastric bypass & key considerations:
To determine if you are eligible for this procedure, please review the requirements below:
- You have a BMI of 35 or higher
- You have a BMI of 30 - 34.9 with weight related health issues such as high blood pressure or cholesterol, joint or back pain, type 2 diabetes and sleep apnoea.
If you are unsure of your Body Mass Index (BMI)
How is a Single Anastomosis Gastric Bypass Performed?
Anesthesia and Laparoscopic Access
The patient is placed under general anesthesia. Several small incisions are made in the abdomen to allow for the insertion of laparoscopic instruments and a camera for visual guidance.
Creation of the Stomach Pouch
A long, narrow pouch is created from the upper part of the stomach using a surgical stapler. This smaller stomach restricts food intake and reduces hunger signals.
Measurement of the Bypass Length
The surgeon measures a section of the small intestine—usually about 150cm from the ligament of Treitz—where the bypass will be connected.
Loop Formation and Bypass
A loop of the measured small intestine is brought up and attached to the newly formed stomach pouch, creating a single connection (anastomosis). This allows food to bypass a significant portion of the stomach and the upper small intestine.
Leak Testing and Inspection
The new connection is tested for leaks and checked for proper blood flow.
At the end of the operation an air leak test is performed with a gastroscope to ensure there is a good seal and no perforation.
Closure and Recovery
The instruments are removed, and the incisions are closed. The patient is then taken to recovery for monitoring. Most patients remain in the hospital for 1 day post-surgery.
Single Anastomosis Bypass Package
What is included
- Initial & Pre-investigation Consultations
- Progress Reviews with Dr Puhalla, 3, 6, 9 & 12 months.
- Surgical & Assistant Surgeon’s Fee
- Dietician Appointments, 7 x appointments pre and post surgery guidance
- 2 year Fresh Start Coaching Program
- Bariatric Starter Pack, includes:
– 1 x Multivitamin Chew Bottle
– 1 x Feel Good Collangen 500g
– 1 x Portion Plate & Bowl
– 1 x Not a Bariatric Cookbook
– Product Samples - Access to our Bariatric Nurse for support
Not Included
- Pre-operative investigations if required e.g gastroscopy, pathology and radiology tests
- Psychologist appointments/assessment if required, referral will be provided
- Anesthetic Fee
- Hospital Fee/Private Health Excess
- Additional surgical procedures e.g hiatus hernia repair or gallbladder removal
If an additional procedure is required this will be quoted at your pre investigation consultation.
Recovery, Aftercare & Follow Up
Initial Recovery
You will usually spend 1 night in hospital. Dr Puhalla will visit you the next day for a check up and to discharge you home. You are required to have someone pick you up from the hospital.
Pain Management
Pain medication will be prescribed. It is recommended to rest and limit daily activities for 1 – 2 weeks
Hydration
Stay well hydrated, aiming to drink 1.5 to 2L a day taking frequent small sips of water.
Dietary Updates
A 4 staged approach to eating will be guided by the dietitian. This approach starts at liquids, pureed, soft and finally solid foods. This 4 staged approach will be aligned with your dietician appointments post surgery.
Follow Up Appointments
You will have your post operative review appointment 2 weeks after surgery. During the first 6 weeks you will see the dietitian every 2 weeks to guide your dietary upgrades. Regular follow ups with Dr Puhalla at 3 months, 6 months and 12 months to monitor progress and surgical outcome.
Increasing Exercise Gradually
Incision Care
Dressing can be removed 1 week post operatively. Leave the purple glue in place for 2-3 weeks post op. Watch for any signs of infection such as redness, swelling, heat or discharge. If unsure, call the clinic and speak with our nurse.
Consuming Alcohol
After surgery you will feel the effects of alcohol more quickly than you did previously. It is advised to make a conscious effort to limit your alcohol intake and frequency after surgery. The regular use of alcohol may lead to poor food choices, weight regain, liver damage, reflux and irritation to your gastrointestinal tract.
Cessation of Smoking or Vaping
You must not smoke or vape after gastric bypass surgery. This is due to a significant increase to your risk of developing peptic ulcers (stomach ulcers).
Ceasing to smoke or vape will also improve your overall health.
Frequently Asked Questions
Haven’t answered all your inquiries? Below are some frequently asked questions that may provide you with the information you are looking for. If we haven’t responded to your query or concerns, please contact our friendly team at (07) 5667 9766 or via email at admin@weightlossoperation.com.au.
How long does a single anastomosis gastric bypass procedure take?
Provided there are no other additional procedures combined, the procedure usually takes 1.5 – 2 hours.
How much weight can I expect to lose?
Weight loss can vary between individuals depending on multiple factors, therefore an exact figure cannot be guaranteed. Most studies show that 2 years after gastric bypass, around 80% of excess weight has been lost, and around 75% after 5 years.
How do I know this procedure is right for me?
To determine your suitability for this procedure, you will need to have a discussion with Dr Puhalla by booking in an initial consultation. The single anastomosis gastric bypass should be my preferred surgical option if I:
- Have metabolic conditions such as diabetes, high blood pressure or high cholesterol
- Eat a diet high in fat or sugar, or tend to binge eat, as negative feedback caused by the bypass will help deter you
- Have a poor weight loss history
- Have a higher BMI
- Have constipation
How much does the procedure cost?
To find out an estimation of cost, please call our clinic on (07) 5667 9766.
Is this procedure safe?
The single anastomosis gastric bypass has a low complication rate, however every surgery carries risks.
Short term risks can include:
- Bleeding
- Infection
- Blood Clots
- Stomach Leaks
Long terms risks can include:
- Reflux
- Malnutrition
- Hernia
- Vomiting
- Ulcers
- Increased frequency of bowel motions
We recommend having a discussion with Dr Puhalla during your consultation to answer any questions or concerns
Are there any pre-operative tests prior to surgery?
Yes, in most cases Dr Puhalla will refer you for a pre- operative blood test.
If clinically indicated, Dr Puhalla may request for you to have a gastroscopy. This is a procedure performed under sedation, where a thin flexible camera is placed down your oesophagus and into your stomach. It can be useful to determine if there is a hiatus hernia, reflux, stomach infections, or ulcers prior to your surgery. A gastroscopy is usually recommended for patients who are over the age of 40, or those who experience reflux symptoms.
Can I still drink alcohol after having a gastric bypass procedure?
Yes you can, however you will feel the effects of alcohol more quickly after bariatric surgery than you previously did. It is advised to make a conscious effort to limit your alcohol intake and frequency. The regular use of alcohol may lead to poor food choices, weight regain, liver damage, reflux and irritation to your gastrointestinal tract.
Can I smoke or vape after having a gastric bypass procedure?
Can I get pregnant after having my procedure?
It is known that weight loss surgery may improve fertility in both females and males. Pregnancy should be avoided in the first 18 months post operatively, due to potential risks to both mother and developing baby. To avoid pregnancy during this time, it is recommended to consider contraceptive options by speaking to your GP. The Oral Contraceptive Pill is less effective after a weight loss surgery, therefore other methods should be used. This is a key consideration if wanting to undergo surgery. If pregnancy occurs earlier than recommended, please contact our team.
Can I have plastic surgery after weight loss surgery?
Yes you can. Some patients may experience loose skin after losing a substantial amount of weight which may affect you physically and emotionally. Speak with our team or your GP to arrange a referral for body-contouring surgery by a plastic surgeon.
I have heard gallstones are common after surgery, will this effect me?
After undergoing a weight loss procedure, there is an increased risk of developing gallstones due to rapid weight loss. If you suspect you may have gallstones, contact the clinic on (07) 5667 9766 and speak to our team.