Comparison of the Efficacy and Safety of Ciprofol Versus Propofol for Sedation in ICU Patients Undergoing Non-Invasive Ventilation

Sedation is frequently required in critically ill patients admitted to the intensive care unit (ICU), including those receiving non-invasive respiratory support such as high-flow nasal cannula (HFNC), non-invasive ventilation (NIV), or conventional oxygen therapy. Anxiety, agitation, dyspnea, and poor tolerance of respiratory support may compromise treatment adherence and increase the risk of respiratory deterioration and endotracheal intubation. Appropriate sedation may improve patient comfort, facilitate respiratory support, and reduce complications. However, sedation in non-mechanically ventilated ICU patients remains challenging because excessive sedation may lead to respiratory depression or hemodynamic instability. Propofol is commonly used for ICU sedation because of its rapid onset and controllable depth of sedation. Nevertheless, propofol is associated with several adverse effects, including respiratory depression, hypotension, and injection pain, which may limit its use in patients without invasive mechanical ventilation. Ciprofol is a novel short-acting intravenous sedative that acts as a gamma-aminobutyric acid type A (GABA-A) receptor agonist and is structurally related to propofol. Previous studies have demonstrated that ciprofol has rapid onset, predictable sedation, less injection pain, and a potentially lower incidence of respiratory depression and hemodynamic instability compared with propofol. Clinical studies have shown favorable safety and efficacy profiles of ciprofol in procedural sedation, anesthesia induction, and sedation in mechanically ventilated ICU patients. However, evidence regarding its use in ICU patients receiving non-mechanical ventilation is still limited. This study aims to compare the effectiveness and safety of ciprofol versus propofol for sedation in adult ICU patients who are not receiving invasive mechanical ventilation. The study will be conducted as a multicenter retrospective cohort study involving approximately 30 te