• Yun Tang, Xiaobo Yang, Yuan Yu, Huaqing Shu, Yin Yuan, Hong Liu, Xiaojing Zou, Shiying Yuan, and You Shang.
• Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
• Crit Care. 2022 Sep 16; 26 (1): 279279.

ObjectiveThe aim of this study was to evaluate the efficacy and safety of remimazolam besylate compared with propofol in maintaining mild-to-moderate sedation in patients receiving long-term mechanical ventilation.MethodsIn this single-centered randomized pilot study, adult patients mechanically ventilated longer than 24 h were randomized to receive remimazolam besylate or propofol. The target sedation range was - 3 to 0 on the Richmond Agitation and Sedation Scale (RASS). The primary outcome was the percentage of time in the target sedation range without rescue sedation. The secondary outcomes were ventilator-free days at day 7, the length of ICU stay and 28-day mortality.ResultsThirty patients were assigned to each group. No difference was identified between the remimazolam group and propofol group in median age [60.0 (IQR, 51.5-66.3) years vs. 64.0 (IQR, 55.0-69.3) years, respectively, p = 0.437] or the median duration of study drug infusion [55.0 (IQR, 28.3-102.0) hours vs. 41.0 (IQR, 24.8-74.3) hours, respectively, p = 0.255]. The median percentage of time in the target RASS range without rescue sedation was similar in remimazolam and propofol groups [73.2% (IQR, 41.5-97.3%) vs. 82.8% (IQR, 65.6-100%), p = 0.269]. No differences were identified between the two groups in terms of ventilator-free days at day 7, length of ICU stay, 28-day mortality or adverse events.ConclusionsThis pilot study suggested that remimazolam besylate was effective and safe for long-term sedation in mechanically ventilated patients compared with propofol.© 2022. The Author(s).

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