Evans A, Vaughan R S, Hall J E, Mecklenburgh J, Wilkes A R
University of Wales College of Medicine, Cardiff, South Glamorgan CF14 4XN, UK.
Anaesthesia. 2003 Sep;58(9):869-73. doi: 10.1046/j.1365-2044.2003.03340.x.
The concern that re-usable equipment may be a source of cross-infection has prompted the increased use of disposable laryngoscope blades. We conducted a study investigating the duration of laryngoscopy and the peak force generated using various laryngoscope blades. Five blades were studied: one reusable Macintosh 3 blade, one disposable metal blade and three plastic disposable blades. Sixty anaesthetists performed laryngoscopy on a mannequin using each of the five blades presented in a random order. This was then repeated with a rigid collar applied to the mannequin. The mean force applied with the collar off with the metal blades was 32.8 and 30.8 N, and with the plastic blades 37.3, 39.6 and 41.5 N, respectively (p < 0.0001). The mean force applied with the collar on with the metal blades was 30.5 and 32.5 N, and with the plastic blades 35.5, 34.9 and 31.4 N, respectively (p < 0.0001). The mean duration of laryngoscopy with the collar off for the metal blades was 5.6 and 5.4 s, and with the plastic blades 10, 7.2 and 7.5 s (p < 0.0001). The duration of laryngoscopy with the collar applied for the metal blades was 7.1 and 7.5 s, and with the plastic blades 11.8, 9.7 and 9.0 s (p < 0.0001). The use of plastic blades results in both greater peak force and duration of laryngoscopy.
对可重复使用设备可能成为交叉感染源的担忧促使一次性喉镜叶片的使用增加。我们开展了一项研究，调查使用各种喉镜叶片进行喉镜检查的持续时间以及产生的峰值力。研究了五种叶片：一片可重复使用的麦金托什3号叶片、一片一次性金属叶片和三片一次性塑料叶片。60名麻醉师以随机顺序使用这五种叶片在人体模型上进行喉镜检查。然后在人体模型上佩戴硬质颈圈重复此操作。不佩戴颈圈时，使用金属叶片施加的平均力分别为32.8 N和30.8 N，使用塑料叶片时分别为37.3 N、39.6 N和41.5 N（p<0.0001）。佩戴颈圈时，使用金属叶片施加的平均力分别为30.5 N和32.5 N，使用塑料叶片时分别为35.5 N、34.9 N和31.4 N（p<0.0001）。不佩戴颈圈时，使用金属叶片进行喉镜检查的平均持续时间分别为5.6 s和5.4 s，使用塑料叶片时分别为10 s、7.2 s和7.5 s（p<0.0001）。佩戴颈圈时，使用金属叶片进行喉镜检查的持续时间分别为7.1 s和7.5 s，使用塑料叶片时分别为11.8 s、9.7 s和9.0 s（p<0.0001）。使用塑料叶片会导致喉镜检查的峰值力和持续时间都更长。
