News Release

New studies suggest benefit of total robotic metabolic and bariatric surgery over conventional laparoscopy

Reports and Proceedings

American Society for Metabolic and Bariatric Surgery

SAN DIEGO – June 11, 2024 – Two new studies* presented today at the American Society for Metabolic and Bariatric Surgery (ASMBS) 2024 Annual Scientific Meeting suggest total robotic metabolic and bariatric surgery may result in shorter operative times, reduced lengths of stay and lower complications compared to laparoscopic approaches.

In one study, researchers from AdventHealth in Celebration, FL examined the outcomes of a single surgeon who performed 809 metabolic and bariatric operations – 498 totally robotic and 311 laparoscopic -- between 2020 and 2023. They found total robotic Roux-en-Y gastric bypass (RYGB) resulted in significantly shorter operative times (97.6 min. vs. 115.4 min), reduced hospitalization (1.19 days vs. 1.39 days), and lower complication rates (1.7% vs. 5.1%) compared to conventional laparoscopy.

Total robotic sleeve gastrectomy procedures produced similar benefits -- less operative time (47.4 min. vs. 53.1 min.), shorter length of stay (1.14 days vs. 1.30 days), and fewer complications (0.8% vs. 3.2%). The surgical approach to a duodenal switch did not influence operative times and complication rates but the total robotic approach did result in shorter lengths of stay.

This study comes after recent meta-analyses and registry reports found metabolic and bariatric surgery performed robotically had similar outcomes to conventional laparoscopy but with longer operative times and higher costs. The researchers note, however, that most of the robotic surgeries in these reports were robot-assisted rather than totally robotic.

In a second study, these same researchers report improved outcomes and efficiencies for robotic procedures involving patients, this time with severe obesity and type 2 diabetes. A total of 744 patients received either totally robotic (n= 469) or laparoscopic RYGB or sleeve gastrectomy (n=275). Major complication rates for patients with diabetes (2.4% vs. 8.3%), length of stay (1.19 days vs. 1.48 days) and operative times (71.7 min. vs. 90.5 min.) were all lower compared to laparoscopy and were comparable to rates seen with patients with no diabetes. The average preoperative BMI was 46.1.

“The robotic platform has advantages for patients with diabetes and high surgical risk,” said study co-author on both studies, Cynthia Buffington, PhD, researcher at AdventHealth. “Surgeons may achieve a higher level of precision, flexibility and control than is possible with conventional laparoscopy.  This results in less tissue trauma, shorter recovery times, less opportunity for scarring, milder postoperative pain, and lower risk for infections and bleeds.”                                                                                                                                          

The ASMBS reports that in 2022 nearly 280,000 metabolic and bariatric procedures were performed in the U.S., which represents only about 1% of those who meet eligibility requirements based on BMI. While the ASMBS does not track the number of robotic surgeries performed each year, these types of procedures are on the rise.

“Total robotic surgery is playing an increasing role in metabolic and bariatric surgery bringing new efficiencies and fewer complications for certain procedures and patients,” said Ann Rogers, MD, ASMBS President-elect and Director, Penn State Surgical Weight Loss Program, Penn State Health, Hershey, PA, who was not involved in the study.

According to the U.S. Centers for Disease Control and Prevention (CDC), obesity effects 42.4% of Americans. Studies show the disease can weaken or impair the body’s immune system and cause chronic inflammation and increase the risk of many other diseases and conditions including cardiovascular disease, stroke, type 2 diabetes, and certain cancers. 

About Metabolic and Bariatric Surgery
Metabolic and bariatric surgery such as laparoscopic gastric bypass and sleeve gastrectomy has been shown to be the most effective and long-lasting treatment for severe obesity. The operations improve or resolve diseases including type 2 diabetes, heart disease and high blood pressure and leads to significant and durable weight loss. The surgery’s safety profile is comparable to some of the safest and most commonly performed surgeries in the U.S. including gallbladder surgery, appendectomy and knee replacement.


The ASMBS is the largest organization for bariatric surgeons in the United States. It is a non-profit organization that works to advance the art and science of bariatric surgery and is committed to educating medical professionals and the lay public about bariatric surgery as an option for the treatment of severe obesity, as well as the associated risks and benefits. It encourages its members to investigate and discover new advances in bariatric surgery, while maintaining a steady exchange of experiences and ideas that may lead to improved surgical outcomes for patients with severe obesity. For more information, visit

*A202 -- Improved Surgical Outcomes of Roux-en-Y Gastric Bypass (RYGB), Sleeve Gastrectomy (SG), and Duodenal Switch (DS) Performed Totally Robotic Versus Laparoscopic -- Dennis Smith Celebration FL1, Ciara Lopez Celebration FL2, Sharon Krzyzanowski Celebration FL2, Catherine Santos Celebration FL2, Cynthia Buffington Celebration FL2 AdventHealth Celebration Hospital1 AdventHealth2

*A315 -- The Advantages of Totally Robotic (TR) Metabolic Bariatric Surgery (MBS) on Surgical Outcomes of Patients with Type 2 Diabetes -- Cynthia Buffington Celebration FL1, Dennis Smith Celebration FL1, Ciara Lopez Celebration FL1, Sharon Krzyzanowski Celebration FL1, Catherine Santos Celebration FL1 AdventHealth1

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