Advancing Strategies to Optimise the PerIopeRativE Management of PostOperative Nausea and Vomiting (ASPIRE-PONV) study: rationale and design for a sequential, repeated crossover trial

INTRODUCTION: This project, in adult surgical patients, will evaluate whether the creation of a customised checklist, driven by a clinical decision support tool, is able to improve anaesthesia providers' adherence to consensus guidelines and standardised practice recommendations for the prevention of postoperative nausea and vomiting (PONV). METHODS AND ANALYSIS: The intervention will be evaluated using a sequential, repeated crossover design at the institutional level, with designated washout, control and intervention periods. The surgical case will serve as the unit of analysis. The primary outcome is adherence to appropriate PONV prophylaxis administration guidelines. Secondary outcomes include the incidence of PONV and length of stay in the postanaesthesia care unit (PACU). ETHICS AND DISSEMINATION: This protocol and statistical analysis plan provide an outline of the study design, primary and secondary end points and analytic approach. The Advancing Strategies to Optimise the PerIopeRativE Management of PostOperative Nausea and Vomiting trial has received approval from the Vanderbilt University Institutional Review Board (IRB: 250773). The results will be disseminated through peer-reviewed publications and presentations at national conferences. Findings from this trial will inform best practices for timely antiemetic prophylaxis, with the goal of reducing PONV incidence and shortening PACU stay. TRIAL REGISTRATION NUMBER: NCT07152249.