BIS和CSI监测不同效应室靶浓度异丙酚复合舒芬太尼患者镇静水平的准确性

目的 评价脑电双频谱指数(BIS)和麻醉深度指数(CSI)监测不同效应室靶浓度异丙酚复合舒芬太尼患者镇静水平的准确性.方法 外科手术患者90例,ASA Ⅰ或Ⅱ级,年龄20～49岁,体重45～70 kg,性别不限,随机分为6组(n=15):P1～3组分别靶控输注不同效应室靶浓度(2、4、6 μg/ml)异丙酚;SP1～3组分别靶控输注不同效应室靶浓度(2、4、6 μg/ml)异丙酚复合舒芬太尼.异丙酚初始效应室靶浓度为4 μg/ml,于气管插管后即刻,P1组和SP1组调整为2 μg/ml,P2组和SP2组调整为4 μg/ml,P3组和SP3组调整为6 μg/ml,20 min后SP1～3组经2～3 min静脉注射舒芬太尼0.7 μg/kg.于麻醉诱导前(T0)、气管插管前1 min(T1)、插管后30 s(T2)、15 min(T3)、30 min(T4)、35 min(T5)及40 min(T6)时记录HR、MAP、BIS和CSI.结果 P1～3组T3～6时组间比较BIS和CSI依次降低(P<0.05或0.01);SP1～3组T3～6时BIS和CSI组间比较依次降低(P<0.05);SP1组和SP2组T4～6时BIS和CSI分别较P1组和P2组降低(P<0.05或0.01);与P3组比较,SP3组T4～6时CSI降低(P<0.05),BIS差异无统计学意义(P0.05).结论 异丙酚效应室靶浓度2、4 μg/ml复合舒芬太尼时,CSI和BIS均可反映患者镇静水平;异丙酚效应室靶浓度6 μg/ml复合舒芬太尼时,仅CSI可反映患者镇静水平.

Accuracy of BIS and CSI for monitoring levels of sedation induced by different effect-site concentrations of propofol during TCI of propofol combined with sufentanil

Objective To evaluate the accuracy of BIS and anesthetic depth index (CSI) for monitoring levels of sedation induced by different target effect-site concentrations (CT) during TCI of propofol combined with sufentanil. Methods Ninety ASA Ⅰ or Ⅱ patients of both sexes aged 20-49 yr weighing 45-70 kg undergoing elective surgery under general anesthesia were randomly divided into 6 groups (n=15 each): group Ⅰ, Ⅱ, Ⅲ TCI of propofol with CT set at 2, 4 and 6 μg/ml respectively (P1-3);groupⅣ, Ⅴ,Ⅵ sufentanil 0.7 μg/kg + propefol TCI with CT set at 2, 4 and 6 μg/ml (SP1-3). Anesthesia was induced with propefol TCI with CT set at 4 μg/ml in all 6 groups. As soon as the patients lost consciousness, tracheal intubation was facilitated with vecuronium 0.1 mg/kg. The patients were mechanically ventilated. PET CO2 was maintained at 35-45 mm Hg. Anesthesia was maintained with propofol TCI with CT set at 2 μg/ml(in group P1, SP1), 4 μg/ml(in group P2, SP2) and 6 μg/ml(in group P3,SP3) immediately after intubation respectively. Sufentanil 0.7 μg/kg was given iv at 20 min after propofol TCI was started in group SP<1-3. MAP, HR, BIS (Aspect) and CSI (Danmeter Denmark) were continuously monitored and recorded before induction of anesthesia (T0, baseline), at 1 min before tracheal intubation (T1), and at 30 s(T2), 15 min(T3), 30 min(T4), 35 min(T5) and 40 min (T6) after tracheal intubation. Results BIS and CSI values were gradually decreasing at T3-6 in group P1-3 and SP1-3. BIS and CSI values were significantly lower at T4-6 in group SP1 and SP2 than in group P1 and P2. CSI values were significantly lower at T4-6 in group SP3 than in group P3, but there was no significant difference in BIS values at T4-6 between SP3 and P3. Conclusion CSI and BIS can monitor the levels of sedation indueed with TCI of propofol with CT set at 2 and 4 μg/ml when combined with sufentanil 0.7 μg/kg but only CSI can monitor the level of sedation induced by propofol TCI with CT set at 6 μg/ml when combined with sufentanil 0.7 μg/kg.