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目的对比观察全身麻醉诱导后采用视可尼喉镜(SOS)和直接喉镜(LS)经口气管插管对血流动力学的影响。方法60例择期经口气管插管全麻下外科手术患者，随机分为LS组和SOS组，经常规静脉诱导后行气管插管。监测麻醉诱导前后、插入气管导管时和气管插管后5min内的收缩压(SBP)、舒张压(DBP)、平均动脉压（MAP）、心率(HR)和脉搏氧饱和度(Sp02)变化。结果气管插管后两组的SBP、DBP、MAP和HR均比麻醉诱导后明显升高，但是SBP和DBP的最大值未超出麻醉诱导前水平，而HR的最大值较麻醉诱导前明显升高。两组在各对应时间点的SBP和DBP无明显差异，SBP和DBP的最大值和最大变化率亦无明显差异。SOS组在插入气管导管时和气管插管后1min的HR 明显高于LS组，但是HR的最大值和最大变化率在两组间无明显差异。出现SBP、DBP和HR最大值的时间在两组之间亦无明显差异。结论临床常用的全身麻醉深度能够完全抑制SOS引导经口气管插管操作引起的血压升高反应，但是不能抑制其心率增快反应。与LS相比较，采用SOS对于预防气管插管的心血管应激反应无明显的优越性。“,” 0bjective:This study was to observe and evaluate the hemodynamic responses to orotracheal intubation with Shikani Optical Stylet(SOS)or laryngoscope(LS)under general anesthesia.Methods:60 ASA grade Ⅰ-Ⅱ adult patients undergoing elective surgery and requiring orotracheal intubation were randomly al ocated to either LS group or SOS group. After standard intravenous anesthetic induction,intubation through LS or SOS was performed respectively.Moninvasive SBP、DBP、HR and Sp02 were recorded before and after anesthetic induction,at intubation and 5 minutes after intubation at 1 minute interval.Results:SBP、DBP and HR increased from the post-induction values after intubation in both groups,but the maximums of SBP and DBP didn’t exceed the pre-induction values while the maximum of HR was higher than the pre-induction value.No significant differences in SBP and DBP at each time point between the two groups were observed. The maximums and the maximal change rates of SBP and DBP didn’t differ between the two groups either.The HR values obtained at intubation and 1 min after intubation in SOS group were significantly larger than those in the LS group,but their maximums and the maximal change rates didn’t differ between the two groups.There were no significant differences in time obtained maximaum values between the two groups. Conclusion:General anesthesia of clinic standard depth can inhibit completely the increase of blood pressure but cannot inhibit the increase of heart rate caused by orotracheal intubation through SOS.Compared with LS,SOS has no special advantages in preventing the hemodynamic responses to intubation.