診斷聽小骨鏈斷離的鼓室圖檢查－病例報告

Tympanometry for the Diagnosis of Ossicular Chain Discontinuity - Case Report

顏士爵(Shih-Cheh Yen) ； 林凱南(Kai-Nan Lin) ； 許權振(Chuan-Jen Hsu)

《中華民國耳鼻喉科醫學會雜誌》 29卷4期 (1994/08) Pp. 295-299

https://doi.org/10.6286/1994.29.4.295

摘要

一般測試鼓室圖的頻率採用220 Hz，而動性鼓膜、鼓膜上有退化性瘢痕組織及聽小骨鏈斷離三者，均可得AD型鼓室圖，故無法由鼓室圖對此三者做鑑別診斷。但利用660Hz為測試頻率，則可區別出D型或E型鼓室圖。本院1993年8月曾經歷一右耳外傷性聽小骨鏈斷離病例，以220 Hz及660 Hz分別測得鼓室圖，其中以660 Hz所測得的E型鼓室圖較能推測聽小骨鏈斷離的病理變化。

關鍵字

聽小骨鏈斷離 ； 鼓室圖

並列摘要

Routine tympanometry uses 220 Hz (or 226 Hz) as the probe frequency. This could not make differences among the tympanograms of hypermobile eardrum, atrophic scar on the eardrum, and ossicular chain discontinuity, because all these three conditions might have the same tympanograms of type AD. In this paper, we reported a patient with traumatic ossicular chain discontinuity of the right ear. Frequencies 220 Hz and 660 Hz were used respectively for tympanometry. Type E tympanogram was revealed by using the 660 Hz as the probe frequency, while 220 Hz tympanometry only showed AD type.

並列關鍵字

ossicular chain discontinuity ； tympanogram