Clinical Applicability of the Sweep Frequency Measuring Apparatus for Diagnosis of Middle Ear Diseases
作者:
Hiroshi Wada,
Takuji Koike,
Toshimitsu Kobayashi,
期刊:
Ear and Hearing
(OVID Available online 1998)
卷期:
Volume 19,
issue 3
页码: 240-249
ISSN:0196-0202
年代: 1998
出版商: OVID
数据来源: OVID
摘要:
Objective:To develop a measuring apparatus that has the ability to sweep both frequency and external auditory meatus static pressure and can display measurement results in a three-dimensional expression. To measure the middle ear dynamic characteristics of normal-hearing subjects and of patients with this apparatus.Design:Investigate 275 ears of 153 normal-hearing subjects and 72 ears with middle ear diseases.Results:The measurement results show fairly distinctive patterns depending on the middle ear conditions, i.e., normal, ossicular chain separation, ossicular chain fixation, secretory otitis media, tympanic membrane perforation, and tympanic membrane atelectasis. The evaluation of patients with ossicular diseases revealed that the rate of correct diagnosis of ossicular chain separation is 84% and that of ossicular chain fixation is 74%. These diagnoses were confirmed by surgery.Conclusion:Displaying the measurement results in a three-dimensional expression is helpful to make correct diagnosis in clinical practice. It is especially easy to make a distinction between the ossicular chain separation and ossicular chain fixation. Therefore, it is concluded that this apparatus has a high degree of clinical applicability to the diagnosis of these diseases.
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