Colletti V
Audiology. 1977 Jul-Aug;16(4):278-87. doi: 10.3109/00206097709071839.
The tympanogram shape has been investigated in 290 patients as a function of probe tone frequency (from 200 to 2000 Hz). As the frequency of the probe tone rises, the tympanogram undergoes characteristic modifications which have been grouped, according to their morphologic similarities, in three classes: V, W and inverted-V shape. These three tympanometric configurations are consistently observed both in normals and in some patients with middle ear disorders. Exceptions to this regular behaviour are the pathological pictures of the middle ear in which the structure or the dynamics of the tympano-ossicular system are significantly altered (massive tympanosclerosis, glue ear and cholesteatoma). The frequency interval at which the characteristic tympanometric configurations appear is the most important factor for differentiating pathophysiologic conditions of the middle ear.
对290例患者的鼓室导抗图形状随探测音频率（200至2000赫兹）的变化进行了研究。随着探测音频率升高，鼓室导抗图会发生特征性改变，根据形态学相似性可分为三类：V形、W形和倒V形。在正常人和一些中耳疾病患者中均能持续观察到这三种鼓室导抗图形态。中耳结构或鼓室-听骨链系统动力学发生显著改变的病理情况（重度鼓室硬化、胶耳和胆脂瘤）属于这种规律表现的例外情况。特征性鼓室导抗图形态出现的频率区间是区分中耳病理生理状况的最重要因素。
