Eguchi S
ORL J Otorhinolaryngol Relat Spec. 1976;38(4):198-205. doi: 10.1159/000275276.
A device is discussed in which tubal opening as one of the functions of the Eustachian tube can be measured by expressing the opening phenomena acoustically. The features of the present device are the following: introduction of the test sound of 2,000 Hz, 85 dB, SPL, directly to the tubal opening through the tubal catheter and recording of fluctuations of the sound pressure obtained at the external auditory meatus during swallowing. The results of model experiment made of resin were 85 dB, SPL, at the speaker, 76 dB, SPL, at the end of tubal catheter and 78 dB, SPL, at the external auditory meatus. In the model experiment it was also demonstrated that the height of spike waves depends on the extent of tubal opening and that the continuity of spike waves depends on the duration of tubal opening. Furthermore, in the present method, there was no so-called basic amplitude, seemingly due to the resonant effects or the direct passing sound, and the opening phenomena were correctly expressed. In the measurement on normal adults it was found that variability of the spike wave pattern between subjects was largely depending on individual subjects, and also some intra-subject variability of successively recorded spike waves on the same subject was noted. It was shown that gradual recovery of spike wave patterns occurred from initial water swallowing to successive dry swalllowing.
本文讨论了一种装置，该装置可通过声学方式表达咽鼓管开口现象来测量咽鼓管的功能之一——咽鼓管开口情况。本装置的特点如下：将2000Hz、85dB声压级的测试声音通过咽鼓管导管直接引入咽鼓管开口，并记录吞咽过程中在外耳道获得的声压波动。树脂模型实验的结果为：扬声器处为85dB声压级，咽鼓管导管末端为76dB声压级，外耳道处为78dB声压级。在模型实验中还表明，尖峰波的高度取决于咽鼓管开口程度，尖峰波的连续性取决于咽鼓管开口持续时间。此外，在本方法中，似乎由于共振效应或直接传声，不存在所谓的基本振幅，并且开口现象得到了正确表达。在对正常成年人的测量中发现，受试者之间尖峰波模式的变异性很大程度上取决于个体，并且在同一受试者上连续记录的尖峰波也存在一些个体内变异性。结果表明，从最初的饮水吞咽到连续的干吞咽，尖峰波模式逐渐恢复。
