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Bispectral index-guided propofol sedation during endoscopic ultrasonography
Ayana Okamoto,Ken Kamata,Takeshi Miyata,Tomoe Yoshikawa,Rei Ishikawa,Tomohiro Yamazaki,Atsushi Nakai,Shunsuke Omoto,Kosuke Minaga,Kentaro Yamao,Mamoru Takenaka,Yasutaka Chiba,Toshiharu Sakurai,Naoshi 대한소화기내시경학회 2022 Clinical Endoscopy Vol.55 No.4
Background/Aims: Bispectral index (BIS) monitors process and display electroencephalographic data are used to assess the depth ofanesthesia. This study retrospectively evaluated the usefulness of BIS monitoring during endoscopic ultrasonography (EUS). Methods: This study included 725 consecutive patients who underwent EUS under sedation with propofol. BIS monitoring was usedin 364 patients and was not used in 361. The following parameters were evaluated: (1) median dose of propofol; (2) respiratory and circulatorydepression; (3) occurrence of body movements; (4) awakening score >8 at the time; and (5) awakening score 2 hours afterleaving the endoscopy room. Results: The BIS group received a significantly lower median dose of propofol than the non-BIS group (159.2 mg vs. 167.5 mg;p=0.015) in all age groups. For patients aged ≥75 years, the reduction in heart rate was significantly lower in the BIS group than in thenon-BIS group (1.2% vs. 9.1%; p=0.023). Moreover, the occurrence of body movements was markedly lower in the BIS group than inthe non-BIS group (8.5% vs. 39.4%; p<0.001). Conclusions: During EUS examination, BIS monitoring is useful for maintaining a constant depth of anesthesia, especially in patients75 years of age or older.