目的 初次应用3种不同视频喉镜于模拟困难气道模型气管插管时的效果,为临床初次处理困难气道时提供技术数据参考。方法 选择在麻醉科实习1~3个月的实习学生32名,均在调整好的AirSim模拟困难气道模型上使用Macintosh喉镜（M组）,GlideScope（G组）、Hc（H组）和Airtraq（A组）进行气管插管。记录气管插管总时间、获得最佳视野的时间、气管导管置入的时间、气管导管置入次数、喉部暴露分级,同时使用VAS评分评估每种喉镜最佳暴露时使用力量的大小和评价潜在创伤。结果 气管插管总时间最短的是M组。获得最佳视野的时间最短的是M组。气管导管置入时间最短的是M组;声门暴露C/L Ⅲ级以上,M组、G组、H组和A组暴露情况分别为46.9%、6.2%、9.3%、12.4%。反复置管次数最少的是H组。最佳暴露时A组声门最佳暴露时使用力量最小。结论 对未使用过视频喉镜的志愿者来说,初次应用3种视频喉镜在模拟困难气道模型气管插管时,与Macintosh喉镜相比,3种视频喉镜能明显改善模拟困难气道下的喉部暴露分级,但会延长插管的时间,对急救是不利的。

Objective To evaluate the effects of the application of three different video laryngoscopes on simulating tracheal intubation in a difficult airway model, and to provide technical data for clinical reference when dealing with difficult airways. Methods Thirty-two intern students who had practiced in the Department of Anesthesiology for 1-3 months were selected and performed tracheal intubation using Macintosh (group M), GlideScope (group G), Hc (group H), and Airtraq (group A) laryngoscopes on an adjusted AirSim simulated difficult airway model. Total time of tracheal intubation, time to obtain the best visual field, time of tracheal tube placement, number of tracheal tube placement, and the classification of laryngeal exposure were recorded, and the VAS score was used to evaluate the strength of each laryngoscopy for optimal exposure. Results The group M had the shortest total time of tracheal intubation, time to get the best field of view, and the time of tracheal tube placement. Regarding C/L grade Ⅲ or higher glottis view, the exposure rates of the group M, the group G, the group H, and the group A were 46.9%, 6.2%, 9.3%, and 12.4%, respectively. The group H had the least number of repeated catheterizations. At optimal exposure, the group A used the least force for laryngoscopy. Conclusion For volunteers who have not used video laryngoscopes, compared with Macintosh laryngoscope when simulating tracheal intubation in a difficult airway, the selected three video laryngoscopes obviously improve the classification of laryngeal exposure, but prolong intubation time, which is unfavorable for first aid.