Effect of low-dose esketamine on intraoperative electroencephalographic burst suppression under general anesthesia in elderly patients
10.3760/cma.j.cn131073-20240816-00607
- VernacularTitle:小剂量艾司氯胺酮对老年患者全身麻醉术中脑电爆发抑制的影响
- Author:
Shiyi HU
1
;
Jing CHENG
;
Yuru FANG
;
Guixia CAO
;
Tao JIANG
;
Yiqiao WANG
Author Information
1. 蚌埠医科大学研究生院，蚌埠 233030
- Publication Type:Journal Article
- Keywords:
Ketamine;
Burst suppression;
Electroencephalography;
Aged;
Anesthesia, general
- From:
Chinese Journal of Anesthesiology
2025;45(6):703-708
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the effect of low-dose esketamine on intraoperative electroencephalogram (EEG) burst suppression under general anesthesia in elderly patients.Methods:In this prospective randomized controlled trial, 86 elderly patients of either sex, scheduled for elective lumbar fusion surgery at Anhui No. 2 Provincial People′s Hospital from March 15 to June 1, 2024, aged 60-85 yr, with a body mass index of 18-28 kg/m 2, of American Society of Anesthesiologists Physical Status classification ⅡorⅢ, were divided into 2 groups ( n=43 each) using a random number table method: esketamine group (group S) and control group (group C). In group S, esketamine at a dose of 0.25 mg/kg was intravenously injected after anesthesia induction, while the equal volume of normal saline was intravenously injected in group C. The occurrence of EEG burst suppression and frequency of the characteristic density spectral array were recorded using the Masimo Sedline cerebral function monitor. The patient state index was recorded before esketamine administration and at 5, 10, 30 and 60 min after administration and at 5 min before the end of the surgery. Delirium was assessed using the Confusion Assessment Method at 1 and 3 days after operation. The total pressing times of patient-controlled analgesia within 48 h after operation, requirement for rescue analgesia and occurrence of adverse reactions (nausea and vomiting, delayed emergence from anesthesia, agitation, headache) were recorded. The consumption of ephedrine, phenylephrine, sufentanil and remifentanil during operation, emergence time, time of tracheal extubation, length of stay in the post-anesthesia care unit, and length of postoperative hospital stay were also recorded. Results:Compared with group C, the incidence of EEG burst suppression and frequency of the characteristic density spectral array were significantly decreased, the patient state index values were increased at each time point after administration and 5 min before the end of surgery, the consumption of ephedrine, phenylephrine, sufentanil and remifentanil during operation was reduced, the effective pressing times of patient-controlled analgesia, rate of rescue analgesia, and incidence of postoperative delirium within 3 days after operation were decreased, and the length of postoperative hospital stay was shortened in group S ( P<0.05). Conclusions:Low-dose esketamine can reduce intraoperative EEG burst suppression and decrease the development of postoperative delirium under general anesthesia in elderly patients.
