丙泊酚靶控输注时舒芬太尼抑制视频喉镜插管的效应室浓度

摘要

目的：探讨丙泊酚靶控输注（TCI）时舒芬太尼抑制视频喉镜气管插管反应的效应室靶浓度（EC50和EC95）。方法：择期全麻手术患者23例，以效应室浓度 TCI 舒芬太尼，3 min 后给予血浆靶浓度为3μg/mL丙泊酚，给予顺式阿曲库铵0．15 mg/kg 行视频喉镜气管插管。舒芬太尼效应室靶浓度按改良序贯法增加或减少0．05 ng/mL，舒芬太尼靶控浓度从0．4 ng/mL 开始。结果：舒芬太尼抑制视频喉镜气管插管反应的 EC50为0．32 ng/mL，95％可信区间（CI）为0．29～0．35 ng/mL；相应的 ECZ 为0．38 ng/mL，95％CI 为0．35～0．55 ng/mL。结论：在复合 TCI 丙泊酚3μg/mL 时，舒芬太尼抑制视频喉镜气管插管反应的 ECZ 和 EC95分别为0．32 ng/mL和0．38 ng/mL。%Objective To deter mine the effect-site concentration of sufentanil blunting responses to tracheal intubation with video laryngoscope during propofol target controlled infusion (TCI). Methods Twenty-three patients undergoing selective surgery under general anesthesia were enrolled in this study. Induction of anesthesia was initiated by TCI sufentanil at the target effect-site concentration 3 min later , TCI of propofol began at the target plasma concentration of 3 μg/mL. Cisatracurium 0.15 mg/kg was ad ministrated for video laryngoscope tracheal intubation after loss of consciousness. The target concentration of sufentanil for consecutive patients was deter mined using the modified Dixon′s up-and-down method by the intubation response of the previous patient , in an increment or decrement of 0.05 ng/mL. The initial concentration was set at 0.4 ng/mL. Results The EC50 of Sufentanil was 0.32 ng/mL with 95%confidence interval of 0.29~0.35 ng/mL; the EC95 was 0.38 ng/mL with 95%confidence interval 0.35-0.55 ng/mL during video laryngoscope tracheal intubation. Conclusion The EC50 and EC95of sufentanil blunting responses to tracheal intubation with video laryngoscope are 0.32 ng/mL and 0.38 ng/mL during propofol TCI.