Veronica Neves Fialho QueirozLuiz Guilherme Villares Da CostaRogerio Póvoa BarbosaFlávio TakaokaLuc De BaerdemaekerDaniel Souza CesarUlisses Cardoso D'OrtoJosé Roberto GaldiVijaya GottumukkalaJuan P. CataSabrine N.T. HemmesMarkus W. HollmanAlain KalmarLucas A.B. De MouraRenato M. MarianoIdit MatotGuido MazzinariGary H. MillsIrimar De Paula PossoAlexandre TeruyaMarcos Francisco Vidal MeloJuraj SprungToby N. WeingartenTanja A. TreschanSeppe KoopmanLeonid EidelmanLee Lynn ChenJae Woo LeeJose J. Ariño IrujoBeatriz TenaHarald GroebenPaolo PelosiMarcelo Gama De AbreuMarcus J. SchultzAry Serpa NetoJuan CatalaMauro BravoRenato Carneir De FreitasChaves FelipeRothman BrunoSchuind ArantesDina Mie HatanakaJoan BeltranConcepción MonsalveSijgje Mari DrogerAtousa DeljouMoldovan SabovYosef Sale RabbuMarina Del Barrio De BonisRenate BabianRobert RabenaltWiebke KöhneAriel RonenAalok V. AgarwalaManuel GranellOspedale Policlinico San MartinoUniklinik DüsseldorfMaria Middelares HospitalUniversity Hospital of GhentHospital Clínico San Carlos de MadridMassachusetts General HospitalDresden University Faculty of Medicine and University Hospital Carl Gustav CarusHeinrich Heine UniversitätUniversity of California, San FranciscoRabin Medical Center IsraelHospital Israelita Albert EinsteinUniversity of Texas MD Anderson Cancer CenterHospital General Universitario de ValenciaMahidol UniversityUniversity of Groningen, University Medical Center GroningenMayo ClinicTel Aviv University, Sackler Faculty of MedicineKliniken Essen-MitteUniversitat de BarcelonaAmsterdam UMC - University of AmsterdamSheffield Teaching HospitalMaasstad HospitalHospital MoriahManises HospitalMaasstad Ziekenhuis2019-08-232019-08-232018-08-01BMJ Open. Vol.8, No.8 (2018)204460552-s2.0-85053010335https://repository.li.mahidol.ac.th/handle/20.500.14594/46497© Author(s) (or their employer(s)) 2018. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. Introduction Robotic-assisted surgery (RAS) has emerged as an alternative minimally invasive surgical option. Despite its growing applicability, the frequent need for pneumoperitoneum and Trendelenburg position could significantly affect respiratory mechanics during RAS. AVATaR is an international multicenter observational study aiming to assess the incidence of postoperative pulmonary complications (PPC), to characterise current practices of mechanical ventilation (MV) and to evaluate a possible association between ventilatory parameters and PPC in patients undergoing RAS. Methods and analysis AVATaR is an observational study of surgical patients undergoing MV for general anaesthesia for RAS. The primary outcome is the incidence of PPC during the first five postoperative days. Secondary outcomes include practice of MV, effect of surgical positioning on MV, effect of MV on clinical outcome and intraoperative complications. Ethics and dissemination This study was approved by the Institutional Review Board of the Hospital Israelita Albert Einstein. The study results will be published in peer-reviewed journals and disseminated at international conferences. Trial registration number NCT02989415; Pre-results.Mahidol UniversityMedicineArticleSCOPUS10.1136/bmjopen-2018-021643