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Association between Remimazolam Administration Rate and Postoperative Delirium in Older Adults Undergoing Cardiovascular Surgery:A Post-hoc Analysis of a Prospective Cohort Study Kensuke SUZUKI 1 , Yoshitaka AOKI 1 , Junya ITO 1 , Ryo IMAI 1 , Takayuki KATSURAGAWA 1 , Yuji SUZUKI 1 , Kensuke KOBAYASHI 1 , Yukako OBATA 1 , Soichiro MIMURO 1 , Yoshiki NAKAJIMA 2 1Department of Intensive Care Medicine, Hamamatsu University Hospital 2Department of Anesthesiology, Hamamatsu University School of Medicine Keyword: remimazolam , postoperative delirium , cardiovascular surgery , cognitive function test , benzodiazepine pp.51-57
Published Date 2024/1/10
DOI https://doi.org/10.18916/masui.2024010011
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 Background:The impact of intraoperative remimazolam administration rate on postoperative delirium is unclear.

 Methods:Using data from a prospective cohort study conducted at our institution, we performed a post hoc analysis of the association between the administration rate of remimazolam during cardiovascular surgery and the incidence of postoperative delirium.

 Results:The study population was 78 patients aged ≧65 years who were maintained on general anesthesia with remimazolam. Among them, 19 patients(24.4%)developed delirium postoperatively. The mean remimazolam administration rate was 0.78 mg・kg−1・hr−1(standard deviation 0.46). A logistic regression analysis demonstrated a significant association between an increase in the remimazolam administration rate and a decrease in the incidence of delirium(odds ratio 0.048[95%CI:0.033-0.68], P=0.025).

 Conclusions:These results suggest that a higher administration rate of remimazolam during cardiovascular surgery does not negatively influence the incidence of postoperative delirium in older adults.


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電子版ISSN 印刷版ISSN 0021-4892 克誠堂出版

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