Kawase Tetsuaki, Kano Shigeyuki, Otsuka Toshihiko, Hamanishi Shinji, Koike Takuji, Kobayashi Toshimitsu, Wada Hiroshi
Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
Otol Neurotol. 2006 Aug;27(5):600-3. doi: 10.1097/01.mao.0000226294.26918.1d.
To investigate the contribution of anatomical factors, such as the caliber of the patent eustachian tube (ET) and the volume of the middle ear cavity, on vocalized sound transmission to the inner ear.
Model experiment using artificial middle ear.
In the present model experiment, sound transmission from the pharynx to the inner ear under patulous conditions was affected by the caliber of the ET and by the mastoid volume, especially in the low-frequency region, that is, a larger caliber of the ET and smaller mastoid volume resulted in greater sound transmission from the pharyngeal space to the inner ear.
Patulous symptoms may be more distressful in patients with poorly developed mastoid cavity than in those with well-aerated mastoid under similar conditions of patulous ET.
探讨诸如咽鼓管（ET）管径和中耳腔容积等解剖因素对发声声音向内耳传递的影响。
使用人工中耳进行模型实验。
在本模型实验中，在咽鼓管开放状态下，声音从咽部向内耳的传递受咽鼓管管径和乳突容积的影响，尤其是在低频区域，即咽鼓管管径越大、乳突容积越小，声音从咽腔向内耳的传递就越强。
在咽鼓管开放情况相似时，乳突腔发育不良的患者相比乳突气腔良好的患者，咽鼓管异常开放症状可能更令人苦恼。
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