Mini Gastric Bypass (One Anastomosis Gastric Bypass)

Mini Gastric Bypass (One Anastomosis Gastric Bypass) is a weight loss surgery procedure that works by restricting the amount of food a patient can eat and reducing food absorption so patients absorb fewer calories. A modified version of Roux-en-Y gastric bypass, this procedure has shown excellent results with fewer complications for our patients at Long Island Laparoscopic Doctors.

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What is Mini Gastric Bypass Surgery?

Laparoscopic mini gastric bypass, or one anastomosis gastric bypass (OAGB) surgery, is the most recent bariatric surgery procedure to gain approval by the American Society for Metabolic and Bariatric Surgery (ASMBS). Also known as single anastomosis gastric bypass, this procedure involves dividing the stomach to create a smaller, long gastric pouch and bypassing a portion of the small intestine so the patient is able to consume less food and absorb fewer calories.

Benefits of Mini Gastric Bypass

    For patients who are good candidates, mini gastric bypass provides a Trusetd Source Checkbox Trusted Source American Society for Metabolic and Bariatric Surgery review of the literature on one-anastomosis gastric bypass Parikh M, Eisenberg D, Johnson J, El-Chaar M; American Society for Metabolic and Bariatric Surgery Clinical Issues Committee Go to Source number of benefits , including:

  • Short operative time
  • Low rate of complications
  • Excellent outcomes
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Mini Gastric Bypass vs Roux-en-Y Gastric Bypass

One anastomosis gastric bypass is sometimes referred to as mini gastric bypass because it is a modified version of Roux-en-Y gastric bypass (RYGB).

Like traditional gastric bypass, mini gastric bypass surgery is both restrictive and malabsorptive, which means that it reduces the amount of food a patient is able to eat and it also reduces the calories absorbed by the body. Patients show similar or better weight loss after mini gastric bypass compared to gastric bypass.

For patients who are candidates, benefits of mini gastric bypass over traditional gastric bypass include:

  • Less technically complex
  • Lower risk of complications
  • May be a Trusetd Source Checkbox Trusted Source One anastomosis gastric bypass vs Poublon N, Chidi I, Bethlehem M, Kuipers E, Gadiot R, Emous M, van Det M, Dunkelgrun M, Biter U, Apers J Go to Source more effective revisional bariatric surgery procedure
  • Improved resolution of type 2 diabetes
  • Improved resolution of hypertension
  • Improved resolution of sleep apnea

Carmine L.

Weight Lost: 136 Lbs.

Type of Procedure: Gastric Bypass

“The best decision I could have made. It began an entire new life for me. I suffered from type 2 diabetes and high blood pressure for years and almost overnight my diabetes practically disappeared. I am off all medications and back able to lead the much more physical life I enjoy.”
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Carmine before and after bariatric surgery

Heather S.

Weight Lost: 124 Lbs.

Type of Procedure: Gastric Bypass

“I knew it was time for a change. When I met with Dr. Atwa, he and his staff greeted me with warm and compassion. Together we decided that gastric bypass would be the best procedure for my needs. I knew I was in good hands and trusted Dr. Atwa and his team wholeheartedly. After my surgery when I cleared to exercise I started kickboxing and doing things I never thought possible when I was 310lbs!"
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Candidates for Mini Gastric Bypass

The criteria to determine candidacy for mini gastric bypass and traditional gastric bypass are similar. In general, a good candidate:

  • Has a BMI above 35
  • Has a BMI above 30 with obesity-related comorbidities such as type 2 diabetes.

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Preparing for Mini Gastric Bypass

The first step in preparing for mini gastric bypass (and any procedure performed at Long Island Laparoscopic Doctors) is to attend a consultation with one of our weight loss doctors. During this meeting, the bariatric surgeon will review the patient’s medical history, learn more about the patient’s weight loss struggles and goals, and perform an examination.

If the patient is deemed a good candidate for mini gastric bypass, the procedure will be scheduled and detailed pre- and post-operative instructions will be provided.

The Mini Gastric Bypass Procedure

Mini gastric bypass surgery is an inpatient laparoscopic procedure that is performed under general anesthesia.

To begin the procedure, the bariatric surgeon uses a laparoscopic stapler to divide the stomach, resulting in a much smaller stomach that is tube-shaped. The surgeon will then bypass up to 7 feet of the intestines, attaching the remaining portion of the intestines to the new, smaller stomach.

Recovery after Mini Gastric Bypass

After mini gastric bypass, patients recover in the hospital for one to two days. At first, the patient will only be able to consume clear liquids. Gradually, our bariatric experts will encourage the patient to slowly advance their diet by introducing first soft foods, then moving on to other foods.

As with any weight loss procedure performed by Long Island Laparoscopic Doctors, the initial recovery after mini gastric bypass is only the first step in a life-long weight loss journey. Patients are supported by our in-house nutritionist and other team members as they embrace a new, healthier lifestyle that is essential to bariatric surgery success.

Patient 1

Patient before weight loss surgery Patient after weight loss surgery
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Patient 2

Patient before weight loss surgery Patient after weight loss surgery
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Patient 3

patient before weight loss surgery Patient after weight loss surgery
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Patient 4

Patient before weight loss surgery Patient after weight loss surgery
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Frequently Asked Questions About Mini Gastric Bypass

Why don’t more patients choose mini gastric bypass surgery?

Mini gastric bypass is has been performed internationally for the past 20 years, but is a relatively new procedure in the United States that was only recently approved by the American Society for Metabolic and Bariatric Surgery. Unlike the experts at Long Island Laparoscopic Doctors, not every bariatric surgeon has the skill, expertise, and training necessary to perform this operation. Additionally, because this procedure is only recently being performed in the United States, there isn’t enough data on it to make it eligible for coverage by many insurance carriers.

Will Insurance cover my Mini Gastric Bypass procedure?

While mini gastric bypass weight loss surgery may be considered medically necessary, it isn’t always covered by patient’s insurance plans because it is a relatively new procedure. When you come in for your weight loss surgery consultation, we’ll help you review your plan to determine coverage. If mini gastric bypass isn’t covered by your insurance, we can help you learn more about weight loss surgery financing options.

What are the risks of Mini Gastric Bypass surgery?

Mini gastric bypass has been found to have a Trusetd Source Checkbox Trusted Source Efficiency and risks of one-anastomosis gastric bypass Aleman R, Lo Menzo E, Szomstein S, Rosenthal RJ Go to Source lower risk profile than traditional gastric bypass surgery. Still, there are risks and complications associated with any surgical procedure.

Risks of Mini Gastric Bypass include:

  • Leaking
  • Bleeding
  • Small bowel obstruction
  • Dumping syndrome
  • Malabsorption
  • Bile reflux

Contact Us

If you are ready to begin your weight loss journey, or if you have not had success losing weight after a previous bariatric surgery procedure, please contact us to schedule a consultation with Long Island Laparoscopic Doctors.

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1 Parikh M, Eisenberg D, Johnson J, El-Chaar M; American Society for Metabolic and Bariatric Surgery Clinical Issues Committee. American Society for Metabolic and Bariatric Surgery review of the literature on one-anastomosis gastric bypass. Surg Obes Relat Dis. 2018 Aug;14(8):1088-1092. doi: 10.1016/j.soard.2018.04.017. Epub 2018 May 9. PMID: 29907540. Available: https://pubmed.ncbi.nlm.nih.gov/29907540/. Accessed December 14, 2022.

2 Poublon N, Chidi I, Bethlehem M, Kuipers E, Gadiot R, Emous M, van Det M, Dunkelgrun M, Biter U, Apers J. One anastomosis gastric bypass vs. Roux-en-Y gastric bypass, remedy for insufficient weight loss and weight regain after failed restrictive bariatric surgery. Obes Surg. 2020 Sep;30(9):3287-3294. doi: 10.1007/s11695-020-04536-x. Erratum in: Obes Surg. 2020 May 8;: PMID: 32307669; PMCID: PMC7378100. Available: https://pubmed.ncbi.nlm.nih.gov/32307669/. Accessed December 14, 2022.

3 Bhandari M, Nautiyal HK, Kosta S, Mathur W, Fobi M. Comparison of one-anastomosis gastric bypass and Roux-en-Y gastric bypass for treatment of obesity: a 5-year study. Surg Obes Relat Dis. 2019 Dec;15(12):2038-2044. doi: 10.1016/j.soard.2019.05.025. Epub 2019 May 24. PMID: 31734066. Available: https://pubmed.ncbi.nlm.nih.gov/31734066/. Accessed December 14, 2022.

4 Mustafa A, Rizkallah NNH, Samuel N, Balupuri S. Laparoscopic Roux-En-Y gastric bypass versus one anastomosis (loop) gastric bypass for obesity: A prospective comparative study of weight loss and complications. Ann Med Surg (Lond). 2020 May 18;55:143-147. doi: 10.1016/j.amsu.2020.04.040. Erratum in: Ann Med Surg (Lond). 2020 Nov 18;60:701. PMID: 32477513; PMCID: PMC7251295. Available: https://pubmed.ncbi.nlm.nih.gov/32477513/. Accessed December 14, 2022.

5 Aleman R, Lo Menzo E, Szomstein S, Rosenthal RJ. Efficiency and risks of one-anastomosis gastric bypass. Ann Transl Med. 2020 Mar;8(Suppl 1):S7. doi: 10.21037/atm.2020.02.03. PMID: 32309411; PMCID: PMC7154323. Available: https://pubmed.ncbi.nlm.nih.gov/32309411/. Accessed December 14, 2022.

The doctors at Long Island Laparoscopic Doctors have either authored or reviewed and approved this content.

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