Niwa H, Takahashi M, Yanagita N, Naganawa S
Department of Otorhinolaryngology, Nagoya University School of Medicine, Japan.
Acta Otolaryngol Suppl. 1990;471:43-50. doi: 10.3109/00016489009124808.
Comparisons of Eustachian tube (ET) functions studied by sequential contrast computerized tomography (CT) and by tubotympanic aerodynamics (TTAG) were made. ET clearance function was assessed by the shape of the cartilaginous portion before, during and at the end of swallowing; ventilatory function was studied by TTAG. ET clarity, real-time dynamics and resolution were all better when observed with sequential CT. Contrast medium was instilled into the middle ear via a drumhead perforation and 1 scan/sec taken during swallowing. We classified ET function based on the presence or absence of a) movement of the cartilaginous portion, and b) contrast medium in the ET as i) movement present, contrast medium seen in ET: ii) movement absent, contrast medium present in ET; and iii) movement present, no contrast medium in the ET. Ventilatory and clearance functions did not parallel one another, attributable to some mechanical, differences between the two functions.
对通过序贯对比计算机断层扫描（CT）和咽鼓管鼓室气动力学（TTAG）研究的咽鼓管（ET）功能进行了比较。通过吞咽前、吞咽期间和吞咽结束时软骨部分的形状评估ET清除功能；通过TTAG研究通气功能。序贯CT观察时，ET的清晰度、实时动态和分辨率均更佳。通过鼓膜穿孔将造影剂注入中耳，并在吞咽期间每秒进行1次扫描。我们根据以下情况对ET功能进行分类：a）软骨部分的运动情况，以及b）ET中造影剂的有无，分为：i）有运动，ET中可见造影剂；ii）无运动，ET中有造影剂；iii）有运动，ET中无造影剂。通气功能和清除功能并不相互平行，这归因于这两种功能之间的一些机械差异。
