肠镜检查不同剂量芬太尼对靶控异丙酚半数有效血浆靶浓度的影响

目的:测定行无痛纤维肠镜检查术患者在不同剂量的芬太尼复合下靶控输注异丙酚的半数有效血浆靶浓度(EC50)。方法:行无痛纤维结肠镜检查术患者64例,分为F1、F2两组,每组各32例。于检查前缓慢推注芬太尼,F1组剂量为 0.6μg/kg,F2组为1μg/kg。患者按序贯法进行试验,异丙酚初始血浆靶浓度设为3.5μg/mL,根据上一个患者体动情况,下一患者血浆靶浓度进行增减的调整,变化幅度为0.5μg/mL。计算两组病例异丙酚EC50及其95%的可信区间。结果:复合0.6μg/kg芬太尼时无痛纤维结肠镜检查术患者靶控输注异丙酚的EC50为(3.89±0.16)μg/mL,95%的可信区间为3.58～4.20μg/mL;复合1μg/kg芬太尼时异丙酚的EC50为(3.75±0.11)μg/mL,95%的可信区间为3.52～3.97μg/mL。结论:靶控输注异丙酚复合0.6μg/kg芬太尼用于纤维结肠镜检查术安全有效,其EC50为(3.89±0.16)μg/mL。

The effects of different doses of fentanyl on the EC50 of propofol target controlled infusion during coloscopy

Objective To determine the EC50 of propofol target-controlled infusion (TCI) combined with various doses of fentanyl in patients receiving coloscopy. Methods Sixty-four patients, aged 16 ～ 60 years, weighing 45 ～ 90 kg, undergoing coloscopy under propofol TCI for sedation were assigned to receive slow intravenous fentanyl of 0.6 μg /kg (group F1), or fentanyl of 1 μg/kg (group F2). The target plasma concentration of propofol was initially set at 3.5 μg /mL and it could be adjusted with a level of 0.5 μg /mL...