
Dr. Ozanan Meireles is a Bariatric, Foregut, and advanced endoluminal Surgeon at the Massachusetts General Hospital, and an Assistant Professor of Surgery at Harvard Medical School. He is the co-founder and the director of the Surgical Artificial Intelligence and Innovation Laboratory (SAIIL) at the Massachusetts General Hospital. Dr. Meireles graduated from the Sao Paulo State University School of Medicine, in Brazil. He completed his surgical training at Michigan State University and his clinical fellowship in Minimally Invasive and Bariatric Surgery at the University of California San Diego. He spent his research fellowship at the Johns Hopkins Hospital investigating augmented reality in surgery and robotic telemanipulation. Furthermore, he was deeply involved in studying and developing Natural Orifices Trans Endoluminal Surgery (NOTES) techniques, and he was among the first to pioneer their clinical applications. At SAIIL, his research focus is on utilizing computer vision to investigate the intraoperative phase of care through real-time, automated surgical analysis, and provide surgeons with additional data, with the goals of democratization of surgical knowledge, lowering costs, improve patient outcomes, and reduction of morbidity and mortality. He is a fellow of the American College of Surgeons (ACS) and the American Society for Metabolic and Bariatric Surgery (ASMBS). He serves as the Chairman of the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) Artificial Intelligence Task Force. He also holds key leadership positions and committee memberships in several other national societies in the United States, including the ACS, NOSCAR, ASMBS, and SSAT.
Selected publications from PubMed
International expert consensus on the current status and future prospects of artificial intelligence in metabolic and bariatric surgery.
Kermansaravi M, Chiappetta S, Shahabi Shahmiri S, Varas J, Parmar C, Lee Y, Dang JT, Shabbir A, Hashimoto D, Davarpanah Jazi AH, Meireles OR, Aarts E, Almomani H, Alqahtani A, Aminian A, Behrens E, Birk D, Cantu FJ, Cohen RV, De Luca M, Di Lorenzo N, Dillemans B, ElFawal MH, Felsenreich DM, Gagner M, Galvan HG, Galvani C, Gawdat K, Ghanem OM, Haddad A, Himpens J, Kasama K, Kassir R, Khoursheed M, Khwaja H, Kow L, Lainas P, Lakdawala M, Tello RL, Mahawar K, Marchesini C, Masrur MA, Meza C, Musella M, Nimeri A, Noel P, Palermo M, Pazouki A, Ponce J, Prager G, Quiróz-Guadarrama CD, Rheinwalt KP, Rodriguez JG, Saber AA, Salminen P, Shikora SA, Stenberg E, Stier CK, Suter M, Szomstein S, Taskin HE, Vilallonga R, Wafa A, Yang W, Zorron R, Torres A, Kroh M, Zundel N
Sci Rep. 2025 Mar 18;15(1):9312 doi: 10.1038/s41598-025-94335-0.
Safety and cost of performing laparoscopic sleeve gastrectomy with same day discharge at a large academic hospital.
Landreneau JP, Agarwal D, Witkowski E, Meireles O, Flanders K, Hutter M, Gee D
Surg Endosc. 2024 Apr;38(4):2212-2218 doi: 10.1007/s00464-024-10673-6.
Desmoid tumor presenting 2 years after elective Roux-en-Y gastric bypass: a case report and review of the literature.
Sierra-Davidson K, Anderson G, Tanabe K, Meireles OR
J Surg Case Rep. 2020 Feb;2020(2):rjz379 doi: 10.1093/jscr/rjz379.
Risk factors and prevalence of liver disease in review of 2557 routine liver biopsies performed during bariatric surgery.
Udelsman BV, Corey KE, Lindvall C, Gee DW, Meireles OR, Hutter MM, Chang DC, Witkowski ER
Surg Obes Relat Dis. 2019 Jun;15(6):843-849 doi: 10.1016/j.soard.2019.01.035.
Sleeve gastrectomy telementoring: a SAGES multi-institutional quality improvement initiative.
Nguyen NT, Okrainec A, Anvari M, Smith B, Meireles O, Gee D, Moran-Atkin E, Baram-Clothier E, Camacho DR
Surg Endosc. 2018 Feb;32(2):682-687 doi: 10.1007/s00464-017-5721-8.

London CRS returns in 2022 with a top-notch faculty from around the globe showcasing the latest innovative technologies in Digital Surgery. This is a 2- part event, including Advanced Tools and Imaging with a lively discussion between our diverse panelists. Leading surgeons and researchers will describe cutting-edge techniques and provide their personal insights on the future of surgery. Don't miss one of the highlights of the surgical calendar - LondonCRS22!
With Karl Storz
Published
Apr 2022

Dr. Antonio M. Lacy, Dr. Alberto Arezzo, Dr. Delia Cortes, Dr. Daniel Hashimoto, Dr. Salva Morales, Dr. Debby Keller, Dr. Venkatesh Munikrishnan, Dr. John Marks, Dr. Pietro Valdastri and Dr. Richard J. Heald present The Future of Colorectal Surgery.
With Stryker
Published
Dec 2020
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