Haidry Mehtab A, Khan Fauzia A
Department of Anesthesia, Aga Khan University, Karachi, Pakistan.
J Anaesthesiol Clin Pharmacol. 2013 Apr;29(2):196-9. doi: 10.4103/0970-9185.111710.
Use of McCoy blade laryngoscope avoids the lifting force in the vallecula and theoretically should lead to a lower hemodynamic response related to laryngoscopy and tracheal intubation. The available literature on the topic is conflicting.
We studied the hemodynamic response to laryngoscopy and tracheal intubation in 60 ASA 1 AND 2 adult patients using either Macintosh or McCoy laryngoscopes. The change in systolic, diastolic, mean arterial pressure, and heart rate (HR) was observed for 10 min post intubation. Arrhythmias and ST changes were also observed.
The maximum change in HR was 18.7% in the Macintosh and 7.7% in the McCoy group, and in systolic arterial pressure was 22.9% in the Macintosh and 10.3% in the McCoy group. This difference between groups was significant (P < 0.0001). The change lasted for a lesser duration in the McCoy group. No arrhythmias or ST changes were observed in either group.
Hemodynamic changes with use of McCoy laryngoscope were lesser in magnitude and of shorter duration.
使用麦考伊喉镜可避免会厌谷的提升力，理论上应会导致与喉镜检查和气管插管相关的较低血流动力学反应。关于该主题的现有文献存在矛盾之处。
我们使用麦金托什喉镜或麦考伊喉镜，对60例美国麻醉医师协会（ASA）1级和2级成年患者进行了喉镜检查和气管插管的血流动力学反应研究。在插管后10分钟观察收缩压、舒张压、平均动脉压和心率（HR）的变化。还观察了心律失常和ST段变化。
麦金托什组HR的最大变化为18.7%，麦考伊组为7.7%；收缩压方面，麦金托什组为22.9%，麦考伊组为10.3%。两组之间的这种差异具有统计学意义（P < 0.0001）。麦考伊组变化持续时间较短。两组均未观察到心律失常或ST段变化。
使用麦考伊喉镜时血流动力学变化的幅度较小且持续时间较短。
