Department of Anesthesiolgy and Pain Medicine, Guri Hospital, College of Medicine, Hanyang University, Guri, Korea.
Korean J Anesthesiol. 2011 Jul;61(1):19-23. doi: 10.4097/kjae.2011.61.1.19. Epub 2011 Jul 21.
The Glidescope® videolaryngoscope is a new device for tracheal intubation that provides an improved view of the larynx. This study was performed to compare the Glidescope with the McGrath videolaryngoscope in terms of time to intubation (TTI) and number of attempts.
Patients were randomly allocated to one of two groups, Glidescope or McGrath group, by using computer-generated numbers. Tracheal intubation was attempted by an anesthesiologist with extensive experience using these two devices. The operator recorded ease of visualization of glottic structures based on the classification described by Cormack and Lehane. Number of failures, number of attempts and their duration, total intubation time, and events during the whole procedure were recorded. The duration of one attempt was defined as the time elapsed between picking up the endotracheal tube and verification of tracheal intubation with visualization of three expiratory carbon dioxide waveforms. TTI was defined as the sum of the duration of all intubation attempts (as many as three), excluding preoxygenation procedures.
TTI was significantly shorter for the Glidescope® compared to the McGrath® laryngoscope (40.5 vs. 53.3 s, respectively, P < 0.05). However, glottic views obtained at intubation were similar between the two groups. Number of intubation attempts was not significantly different between the two groups (1.03 ± 0.19 vs 1.10 ± 0.32, respectively) (mean ± SD).
Study results demonstrated that the Glidescope reduced total intubation time in comparison with the McGrath, in terms of TTI in patients with normal airways.
Glidescope®视频喉镜是一种新的气管插管设备，可提供更好的喉部视图。本研究旨在比较 Glidescope 和 McGrath 视频喉镜在插管时间（TTI）和尝试次数方面的差异。
患者通过计算机生成的数字随机分配到 Glidescope 或 McGrath 组。由一位使用这两种设备经验丰富的麻醉师尝试进行气管插管。操作者根据 Cormack 和 Lehane 描述的分类记录声门结构的可视化难易程度。记录插管失败次数、尝试次数及其持续时间、总插管时间以及整个过程中的事件。一次尝试的持续时间定义为拿起气管内导管与验证气管插管之间的时间间隔，即观察到三个呼气二氧化碳波形。TTI 定义为所有插管尝试（最多三次）的持续时间之和，不包括预吸氧程序。
与 McGrath®喉镜相比，Glidescope®的 TTI 明显缩短（分别为 40.5 和 53.3s，P<0.05）。然而，两组的声门视图相似。两组的插管尝试次数无显著差异（分别为 1.03±0.19 和 1.10±0.32）（均数±标准差）。
在气道正常的患者中，与 McGrath 相比，Glidescope 可减少总插管时间，从而缩短 TTI。
