目的：观察测量拔管后气管导管屈角，并对屈角形成的可能相关因素进行分析。方法全身麻醉苏醒后，收集置管时间超过50 min的数量约300条(内径型号，ID：5.5~7.5)使用后的普通PVC气管导管，冷水冲洗后放到固定支架下摄取数码照片，同时记录气管导管的型号和留置时间。使用Corel Draw 12.0对符合要求的气管导管的屈角进行测量。对屈角进行描述性统计分析，分析留置时间与气管导管屈角之间的相关性，比较不同型号气管导管的屈角。结果气管导管屈角为86°~132°，平均(108.4±8.5)°，呈大致正态分布，气管导管留置时间与气管导管屈角之间无显著的相关性(r=-0.072，P=0.232)，而不同气管导管内径与屈角之间却表现出显著的差异性(F=167.216，P=0.000)。结论气管导管口腔置管超过50 min后，会发生屈角变形，其屈角约为(108.4±8.5)°，其变形与气管ID有关，反映了口咽部气道解剖。%Objective To measure the shaped angle of the endotracheal tube (ET) after extubation, and to an-alyze the related factors. Methods Three hundred oral intubated ETs (inner diameter, ID range:from 5.5 to 7.5) were collected after extubation from general anesthetized patients. After washed by cold water, the collected tubes were pho-tographed in a fixed holder by a digital camera, and shaped angles of ETs were measured by CorelDraw 12.0. The fol-lowing data were recorded of each tube:ID and intubated duration of the ETs. Shaped angles and intubated durations of ETs were statistically described, and factors which may affect ET shaped angles were also analyzed, including intu-bated durations and ID of ETs. Results A total of 283 photos were taken among 300 ETs, and shaped angle measured with normal distributed roughly [ranged from 86° to 132° , (108.4 ± 8.5)° in mean]. There was no significant relation-ship between shaped angles and intubated duration (r=-0.072, P=0.233). However, if grouped by ID, ETs shaped an-gles were differed significantly (F=44.735, P=0.000). Conclusion After intubated orally for more than 50 min, endo-tracheal tubes will be shaped into a angle at (108.4 ± 8.5)° and differ from different inner diameter, which may be caused by anatomy of oropharyngeal airway.
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