Department of Emergency and Intensive Care Medicine, Asahikawa Medical University, Asahikawa 078-8510, Hokkaido, Japan.
J Clin Anesth. 2012 Nov;24(7):561-5. doi: 10.1016/j.jclinane.2012.04.007.
To evaluate the effectiveness of the Pentax-AWS Airway Scope (AWS) in comparison to the Macintosh laryngoscope during nasotracheal intubation.
Prospective randomized study.
Operating room of a university-affiliated hospital.
90 ASA physical status 1 and 2 adults, aged 18 to 72 years, scheduled for orthodontia surgery requiring nasotracheal intubation.
Patients were randomly assigned to three groups to undergo tracheal intubation with a Macintosh laryngoscope (Group Mac; n = 30), AWS with its tip inserted into the vallecula for indirect elevation of the epiglottis (Group AWS-I; n = 30), or AWS with its tip positioned posterior to the epiglottis for direct elevation of the epiglottis (Group AWS-D; n = 30).
Percentage of glottic opening (POGO) score at the time of laryngeal exposure, time required for intubation, and intubation difficulty scale (IDS) were measured. The frequency of postoperative sore throat and hoarseness also were noted.
Patient demographics did not differ among the groups. In Groups AWS-I and AWS-D, IDS scores were reduced significantly, and the percentages of glottic opening were significantly improved, compared with the Macintosh group. Time to place the endotracheal tube was significantly shortest in Group AWS-I. In one case from each group, intubation within two attempts failed and a different approach was required.
The AWS offers better intubation conditions than the Macintosh laryngoscope during nasotracheal intubation. The AWS may be used to elevate the epiglottis both directly and indirectly for nasotracheal intubation.
评估 Pentax-AWS 气道镜（AWS）与 Macintosh 喉镜在经鼻气管插管中的有效性。
前瞻性随机研究。
一所大学附属医院的手术室。
90 名 ASA 身体状况 1 级和 2 级成年人，年龄 18 至 72 岁，计划接受需要经鼻气管插管的正畸手术。
患者被随机分为三组，使用 Macintosh 喉镜进行气管插管（Mac 组，n = 30）、AWS 并将其尖端插入会厌谷以间接抬高会厌（AWS-I 组，n = 30）或 AWS 将其尖端置于会厌后直接抬高会厌（AWS-D 组，n = 30）。
测量在喉镜暴露时的声门张开百分比（POGO）评分、插管所需时间和插管难度量表（IDS）。还注意了术后咽痛和声音嘶哑的频率。
各组患者的人口统计学特征无差异。在 AWS-I 和 AWS-D 组中，与 Macintosh 组相比，IDS 评分显着降低，声门张开百分比显着提高。AWS-I 组放置气管内导管的时间明显最短。每组各有 1 例，两次尝试内插管均失败，需要采用不同方法。
AWS 在经鼻气管插管期间提供了比 Macintosh 喉镜更好的插管条件。AWS 可用于直接和间接抬高会厌进行经鼻气管插管。
