Severe Nausea and Vomiting in the Evaluation of Nitrous Oxide in the Gas Mixture for Anesthesia II Trial. Categories: Nitrous Oxide Author: Beattie WS, Chan MT, Forbes A, Haller G, Kasza J, Leslie K., Myles PS, Osborne C, Paech MJ, Peyton PJ, Sessler DI, Sneyd JR