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題 名 | 突發性耳聾患者之前庭誘發肌性電位=Vestibular Evoked Myogenic Potential in Patients with Sudden Deafness |
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作 者 | 吳振吉; 楊怡和; | 書刊名 | 慈濟醫學 |
卷 期 | 12:4 2000.12[民89.12] |
頁 次 | 頁231-236 |
分類號 | 416.865 |
關鍵詞 | 前庭誘發肌性電位; 突發性耳聾; 球囊頸反射; Vestibular evoked myogenic potential; VEMP; Sudden deafness; Sacculo-collic reflex; |
語 文 | 中文(Chinese) |
中文摘要 | 目的︰前庭誘發肌性電位( vestibular evoked myogenic potential, VEMP )為 近年來新開發的前庭功能檢查,其反應乃利用極大閾值的音刺激來檢測球囊頸反 射。由於其作用機轉及反射路徑不明處仍多,因此進行本研究。 病人與方法︰突發性耳聾病人,接受tone burst音(95 dBHL, 500 Hz)單耳刺激,以 檢測其VEMP反應之出現與否。 結果︰十名病人中,男性3名,女性7名,平均年齡40歲。十例病耳中,有9 耳(90%)VEMP呈陽性反應,其中7耳之平均聽力閾值超過90 dB。溫差測驗異常 者有4耳,但4耳之VEMP均呈陽性反應。病變耳VEMP之I (p13)波、II (n23) 波之潛時與I-II波間振幅,各為16.1±3.0 ms、21.9±2.2 ms、23.6±8.6 μV;相較於 健側耳(對照耳)之14.9±2.1 ms、20.3±1.8 ms、27.8±8.7μV,兩組間均無統計學上之 差異。有1例為慢性中耳炎併生突發性耳聾,以tone burst音刺激未能誘發VEMP 反應;但改以前額敲擊法,則可誘發VEMP反應。 結論︰VEMP的反應路徑,乃經由下前庭神經的球囊頸反射。其出現與否,與感 音性聽力喪失、溫差反應之有無,並無相關;但傳音性聽力喪失的存在,會影響 VEMP反應的出現。(慈濟醫學 2000; 12: 231-236) |
英文摘要 | Objective: Vestibular evoked myogenic potential (VEMP) is a newly developed examination for assessing the sacculo-collic reflex which can be induced by a loud tone burst. This study was performed to elucidate the mechanism and pathways of the VEMP. Patients and Methods: Ten patients (3 men and 7 women) with sudden deafness were subjected to a VEMP test by tone burst (95 dBHL, 500 Hz). Results: Nine (90%) of the ten ears with lesions had normal VEMPs, of which seven had a pure tone average of more than 90 dBHL. Four ears had canal palsy, but normal VEMPs. In comparison to wave I (p13) latency, wave II (n23) latency, and wave I-II amplitude showed no differences between the ears with lesions and control ears (16.1±3.0 ms, 21.9±2.2 ms, and 23.6±8.6 μV versus 14.9±2.1 ms, 20.3±1.8 ms, and 27.8±8.7 μV, respectively). Tapping instead of tone burst stimulation successfully evokes a VEMP response in an ear with chronic otitis media. Conclusions: VEMP is generated via the inferior vestibular nerve, which is unrelated to the hearing level or caloric response, but can be attenuated by conductive hearing loss. (Tzu Chi Med J 2000; 12:231-236) |
本系統中英文摘要資訊取自各篇刊載內容。