Mini Gastric Bypass vs Gastric Bypass

mini gastric bypass vs gastric bypass

If you are researching bariatric surgery and are wondering which surgery is better, gastric bypass or mini-gastric bypass? Keep reading and you will learn the similarities, differences, and what type of results you can expect from each.

When considering whether gastric bypass surgery (Roux-en-Y) or a mini gastric bypass may be a good choice for you it is important to note that both techniques yield significant weight loss results in a short period of time. But the technique used is very different with gastric bypass surgery altering more of the digestive system which can result in a longer recovery time.


What Is Roux-en-Y Gastric Bypass Surgery?

During gastric bypass surgery, the stomach is made much smaller and shaped into a small pouch about the size of an egg that can hold about 2 Oz of food. Next, the surgeon splits the small intestine into two pieces, which is also called a double anastomosis, and attaches one to the bottom of the newly formed pouch and the other is re-routed lower down on the small intestine. This bypasses the majority of the small intestine and the digestive system.

How Weight Loss Occurs through Gastric Bypass?

Significant weight loss is obtained because the smaller stomach makes it impossible for very much food to be eaten in one sitting. Also, since the food ingested is bypassing most of the digestive system, very few calories can be absorbed and turned into fat.

What is a Mini Gastric Bypass Surgery?

During mini gastric bypass surgery, the stomach is made much smaller and shaped into a tube shape that can hold 4-6 Oz of food. The surgeon then reroutes one portion of the small intestine and connects it a bit lower down so that it bypasses about 20% of the digestive system, also called a single anastomosis.

How Weight Loss Occurs through a Mini Gastric Bypass?

A large amount of weight can be lost because the smaller stomach size limits the amount of food that can be eaten at meals. Also, bypassing a portion of the digestive system, prevents many calories and nutrients to be absorbed.

Video: Mini Gastric Bypass Explained by Dr. Chris

Mini Gastric Bypass With Dr. Chris - IBI Healthcare Institute

Top Atlanta Surgeon discusses the benefits of mini Gastric bypass over classic bypass for weight loss, such as improved weight loss and safety, and fewer com...

How Are Mini Gastric Bypass and Gastric Bypass Compared?

Key Elements of Each Surgery Chart

Mini Bypass Bypass
Surgery Length
1,5-2 hours 2,5-3 hours
Hospital Stay
2-3 days 2-3 days
Complication Risks
2,9% 7%

Similarities of Gastric Bypass vs Mini Gastric Bypass

  • Overall potential weight loss – both procedures offer up to 60% of excess body weight.
  • Restrictive – both procedures limit the amount of food that can be eaten. Gastric bypass: stomach size is reduced to 2 oz size. Mini bypass: stomach size is reduced to 4-6 oz size.
  • Malabsorptive – both procedures modify the digestive system causing less absorption of nutrients, calories, and vitamins so patients must take supplements & vitamins for the rest of their lives to ensure the body gets what it needs.
  • Both procedures offer relief from weight-related health issues – many obese patients suffer from health issues that are directly related to their weight. By eliminating the excess weight, many of these issues are also eliminated or relieved. These issues may include type 2 diabetes, high blood pressure, sleep apnea, etc.

Differences of Mini Gastric Bypass vs Gastric Bypass Chart

Mini Bypass Bypass
Alteration Of The Digestive System
A less complicated procedure involving 1 connection to the small intestine and only bypasses about 20% of the small intestine. A more involved reconfiguration of the digestive system and involves 2 connections to the small intestine and bypassing a larger portion.
Surgical Procedure
Shorter operation and a lower risk of complications. Longer operation and a higher risk of complications.
Normal doses of medication are effective. Requires higher doses of medication for it to be effective.
Future Alteration Surgery
Revision surgery to convert or reverse can be done. Revision surgery is very complicated and normally only done if no other options exist
Food Tolerances
Patients who had a mini gastric bypass tolerate a wider variety of foods better than those who have gastric bypass surgery. Patients who had a gastric bypass tolerate a lesser variety of foods.
Cost of Surgery
Usually more cost-effective as well as less complicated a procedure. Usually more expensive.

Who is a Candidate for Gastric Bypass Surgery vs Mini Gastric Bypass?

  1. Patients with a BMI of 40+
  2. Patients with a BMI of 35+ and weight-related health issues
  3. Patients who have tried other weight loss methods including diet and exercise and failed.

Real-Life Results After Mini Bypass vs Full Bypass

Gastric bypass and mini-gastric bypass results are remarkably similar. The results of a randomized controlled clinical trial were published in 2005 that compared patient results between traditional gastric bypass surgery and mini-gastric bypass surgery. There were some interesting statistics

  • 80 patients ages 18-59 were involved with the trial and 100% of them participated for the full 2 years.
  • Both groups were treated laparoscopically. The surgery for gastric bypass averaged 205 minutes while the mini-bypass surgery time averaged 148 minutes.
  • The gastric bypass group stayed in the hospital longer and required larger doses of pain medication than the mini-bypass group.
  • There was no mortality in either group.
  • There was 1 conversion In the gastric bypass group meaning the surgery started out laparoscopically but had to be performed as open surgery.
  • 6 patients in the gastric bypass group developed minor complications including ileus, bleeding in the upper gastrointestinal tract, and leakage from a drainage tube but all recovered with treatment. There were no major complications in the mini-gastric bypass group only 3 minor ones.
  • There were no major but 3 (7.5%) minor complications in the mini-gastric bypass group.
  • Both groups equally reported significant increases in quality of life.

Excess Weight Loss Comparison Chart

Mini Bypass Bypass
Year 1
64.9% 58.7%
Year 2
64.4% 60.0%

Furthermore, residual weight loss was accomplished in 75% of the gastric bypass patients and 95% in the mini-bypass patients. The study concluded with the statement that both procedures were effective against morbid obesity. Mini-gastric bypass surgery is less complicated and poses fewer risks than traditional gastric bypass surgery, however, delivers the same potential weight loss results.

Video: Mini Gastric Bypass Patient Recovered within 12 Hours

Mini Gastric Bypass Patient Testimonial - IBI Healthcare Insitute

The patient of IBI Healthcare Institute recovered within a half-day after mini-gastric bypass!Learn more about mini-gastric bypass: https://www.ibihealthcare...

If you or a loved one are considering gastric bypass or mini gastric bypass surgery, call our offices today to set up a consultation. IBI Healthcare Institute puts the safety of our patients first and strives to use the least invasive technique that will address the patients’ needs. During your consultation, we will discuss the different weight loss options in detail, and together, choose the one that best fits your needs. Please call today we look forward to taking the first of many steps in your weight loss journey with you.

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