鼻内镜术中听觉诱发电位指数及血流动力学变化

目的调查鼻内镜术中知晓的发生,研究其与听觉诱发电位指数(AEPI)和血流动力学变化的关系。方法对30例鼻内镜手术病人,麻醉采用静脉注射1%利多卡因2 ml、芬太尼3μg/kg、丙泊酚2 mg/kg和琥珀胆碱2 mg/kg麻醉诱导,以丙泊酚靶控输注(TCI)、芬太尼、阿曲库胺维持麻醉,监测平均动脉压(MAP)、心率(HR)和AEPI。麻醉医生根据血流动力学和经验调整丙泊酚TCI效应室浓度以控制麻醉深度。另安排一耳鼻喉科医生负责记录基础值、诱导后、插管后、置入鼻内镜后、鼻腔填塞及术毕时各参数。结果所有患者麻醉诱导、手术顺利,麻醉诱导后全组患者MAP和HR显著下降(P<0.05),全组与诱导后相比,血流动力学无统计学差异,全组患者基础AEPI值平均为76.9±9.6,诱导后明显下降(P<0.01);全组患者中3例出现术中知晓,发生率为10%,知晓发生时间分别在置入鼻内镜、鼻腔填塞时;全部知晓者无疼痛回忆。3例患者出现术中知晓时AEPI值均高于40,其余27例患者AEPI值无一例高于40。结论鼻内镜手术时间短,凭经验和血流动力学变化实施全身麻醉,术中知晓发生率高,表现为AEPI值偏高;以AEPI作为麻醉深度的指标,可减少或防止术中知晓的发生。

Changes in Auditory Evoked Potentials Index and Hemodynamics of Patients with Endoscopic Sinus Surgery

Objective To observe the changes in auditory evoked potentials index(AEPI) and hemodynamics of the patients with endoscopic sinus surgery and anesthesia management.Methods Thirty patients(ASA Ⅰ-Ⅱ) aged 25-45 undergoing elective endoscopic sinus surgery received general anesthesia.All the patients were induced with fentanyl(3 μg/kg),propofol(2 mg/kg) and scoline(2 mg/kg).The maintenance of anesthesia depended on propofol(target computer infusion) and atracrium.MAP,HR and AEPI were observed during anesthesia.Results In all patients,MAP and HR were significantly decreased after induction.Three patients had awareness during operation and their AEPI were over 40.Conclusion AEPI is a better parameter applied to the patients with endoscopic sinus surgery.