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拉贝洛尔 拉贝洛尔降压下瑞芬太尼按捺子痫前期产妇气管插管反响的对折有用浓度

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汪涛等

[摘要] 意图 讨论瑞芬太尼按捺子痫前期产妇气管插管心血管反响的对折有用浓度(EC50)。 办法 挑选子痫前期产妇30例,静注拉贝洛此后诱导,瑞芬太尼初始效应室浓度为3 ng/mL。气管插管心血管反响阳性规范:收缩压或舒张压≥160/110 mmHg。选用Probit概率回归法核算瑞芬太尼EC50及其95%可信区间。 成果 瑞芬太尼按捺气管插管心血管反响的EC50及其95%可信区间为1.93(1.89~1.95)ng/mL。 定论 瑞芬太尼按捺子痫前期产妇气管插管心血管反响的EC50为1.93 ng/mL。

[关键词] 瑞芬太尼;丙泊酚;拉贝洛尔;剂量效应联系

[中图分类号] R614.2 [文献标识码] B [文章编号] 1673-9701(2014)29-0063-03

Median effective target effect-site concentration of remifentanyl inhibiting cardiovascular response to tracheal intubation in women with preeclampsia under intravenous injection of labetalol

WANG Tao1 ZENG Zhongyou1 ZHANG Wangping2 XU Qun2 ZHANG Yinfa2 XIAO Fei2

1.Department of Anesthesiology, Jiaxing Hospital Chinese Peoples Armed Police Force of Zhejiang Province, Jiaxing 314000, China; 2.Department of Anesthesiology, Jiaxing Women and Childrens Hospital in Zhejiang Province, Jiaxing 314000, China

[Abstract] Objective To determine the median effective concentration (EC50) of remifentanyl inhibiting cardiovascular response to tracheal intubation in women with preeclampsia. Methods Thirty women with preeclampsia were enrolled in this study. The target Ce was set at 3 ng/mL. The positive cardiovascular response was defined as the blood pressure ≥160/110 mmHg. The EC50 (95% confidence interva1) of cardiovascular responses to tracheal intubation was calculated by Probit analysis. Results EC50 (95% confidence interval) of remifentanyl inhibiting cardiovascular response to tracheal intubation was 1.93 (1.89~1.95) ng/mL. Conclusion EC50 of remifentanyl inhibiting cardiovascular response to tracheal intubation is 1.93 ng/mL in women with preeclampsia.

[Key words] Remifentanil; Propofol; Labetalol; Dose-response relationship

在围手术期,阿片类药物常用来按捺机体对气管插管的应激反响[1]。因为阿片类药物可通过胎盘屏障引起新生儿呼吸按捺,故剖宫产术全身麻醉诱导时一般不建议运用。现在遍及的观念仍然是不引荐芬太尼用于剖宫产全身麻醉诱导[2]。瑞芬太尼是短效的阿片类受体激动剂,可有用地按捺气管插管诱发的心血管反响,尤合适高危产科的麻醉诱导[3]。关于子痫患者来说,气管插管诱发心血管反响会添加心脑血管等并发症的发作几率,拉贝洛尔是操控子痫前期高血压的常用药物。本研讨拟讨论在运用拉贝洛尔降压时瑞芬太尼按捺产妇气管插管心血管反响的EC50,为子痫产妇全麻使用瑞芬太尼供给参阅。

1 材料与办法

1.1 一般材料

本研讨获医院道德委员会同意,及患者或家族签署知情同意书。挑选2013年1~2月间择期拟行剖宫产的ASAⅡ~Ⅲ级子痫前期产妇30例,年纪20~38岁,均匀(28.3±5.6)岁,体重61~85 kg,均匀(68.2±7.6)kg,孕34~39周,均匀(36.6±2.3)周,身高153~171 cm,均匀(158.7±4.6)cm,血小板数(54~70)×109/L,扫除支气管哮喘者。在全麻后,选用下腹部横切断剖宫产手术,一切产妇在胎儿娩出后当即给予10 U缩宫素静滴。

1.2 麻醉与监测

产妇入室后敞开上肢静脉通路,衔接S/5型麻醉监护仪(GE公司出产)监测ECG、BP、HR、SpO2、呼气末二氧化碳分压(PETCO2)。保持手术室温度22℃~24℃,湿度40%~60%。消毒铺巾后麻醉诱导:预吸纯氧5 min后顺次静脉注射瑞芬太尼(剂量待定,宜昌人福药业公司,批号6120609,1 mg/支),丙泊酚(北京费森尤斯卡比公司,批号H200408,200 mg/20 mL)1.5 mg/kg,认识消失后接TOF.Watch SX肌松监测仪(Organon公司,爱尔兰)监测左手拇内收肌肌颤搐,选用4个成串影响(TOF),频率2 Hz,波宽200 s,电流强度40 mA,影响距离15 s。定标后,静脉注射罗库溴铵(欧加农制药公司出产,批号479904,50 mg/5 mL)0.6 mg/kg。T4/T1≤5%时由操作娴熟的麻醉医生经口明视气管插管(诱导前静注拉贝洛尔0.3 mg/kg),接麻醉机(DATEX-OHMEDA Astiva/5麻醉机)行机械通气,氧流量1 L/min,V=8 mL/kg,RR=12 次/min,吸呼比1∶2,保持PETCO2 35~40 mm Hg(1 mm Hg=0.133 kPa)。麻醉保持:静脉输注丙泊酚(6~8)mg/(kg·h)和连续静注芬太尼0.1 mg,用BIS监测仪(美国A2000)使麻醉深度保持在BIS值45~60之间,记载麻醉诱导期间血流动力学状况,新生儿行Apgar评分。endprint

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