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題 名 | Effects of Acute Brainstem Compression on Auditory Brainstem Response in the Guinea Pig=急性腦幹壓迫對天竺鼠聽性腦幹反應之影響 |
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作 者 | 杜宗陽; 尤亮惠; 邱仁輝; 許志宏; 蕭安穗; 連江豐; | 書刊名 | 中華醫學雜誌 |
卷 期 | 61:11 1998.11[民87.11] |
頁 次 | 頁643-650 |
分類號 | 416.812 |
關鍵詞 | 聽性腦幹反應; 腦幹壓迫; 誘發性聽力測量; Auditory brainstem response; Brainstem compression; Evoked response audiometry; |
語 文 | 英文(English) |
中文摘要 | 背景 本研究目的在建立天竺鼠聽性腦幹反應之正常值,並探討急性腦幹壓迫是 否可引起聽性腦幹反應之變化。 方法 36隻具正常Preyer's 反應之天竺鼠經麻醉後,以開顱術移去右側枕骨,剪開硬 腦膜,暴露出大腦、小腦及小腦橋腦角。以一可灌水的小汽球置入小腦橋腦角,並分別在切 開頭皮前,置入空汽球後及灌水時,測量同測耳之聽性腦幹反應。 結果 基準值聽性腦幹反應記錄到5個穩定波形。當汽球灌水0.1ml時,第Ⅳ、第Ⅴ波 之絕對潛伏值,第III-IV波及第IV-V波之相對潛伏值均延長;第II/I、III/I、IV/I及V/I振 幅比減少。灌水0.2ml時,第IV、第V波之絕對潛伏值延長;各波之振幅比更減少:當灌 水0.3ml時,第V波消失,第III、第IV波之絕對潛伏值延長;此時第I、第II波之絕對潛 代值尚無變化。汽球水量增加到0.4ml時,第III、第IV、第II波消失;第II波之絕對潛伏 值延長,但第I波之波幅及絕對潛伏值則無變化。 結論 本研究建立實驗室之天竺鼠聽性腦幹反應之正常值,並發現急性腦幹壓迫使第 Ⅱ、第Ⅲ、第Ⅳ、第Ⅴ波之絕對潛伏值延長。顯示天竺鼠之聽性腦幹反應第Ⅱ、第Ⅲ、第Ⅳ、 第Ⅴ波來自腦幹,而第Ⅰ波則不是。 |
英文摘要 | Background. The purpose of this study was to establish the norm for parameters of auditory brainstem response (ABR) in the guinea pig and to investigate if acute brainstem compression results in significant changes to these parameters. Methods. Thirty-six guinea pigs with positive Preyer's reflex were anesthetized. A craniectomy was performed to remove the right occipital bone and the dura mater was opened to expose the brain, cerebellum and cerebellopontine angle (CPA). A small inflatable balloon was placed into the CPA precisely and slowly. ABR was recorded before incision of the skin as a baseline value, after placement and after inflation of the balloon with water at 0.1-ml intervals. Results. Five stable peaks were recorded in 27 experimental animals. When the balloon was inflated with 0.1 ml water, the absoluter latency (AL) of peaks IV and V and the interpeak latency (IPL) of peaks IIIand IV, and IV and V were prolonged. The amplitude ratios (AR) of peaks II,III,IV and V to peak Idecreased. Inflation of the balloon with 0.2 ml of water caused further elongation of ALs of peaks IV and V and decreases in each AR. When the balloon volume increased to 0.3 ml, peak V became unrecognizable and peaks III and VI showed significant elongation of AL; peaks I and II did not show significant change in Als. Further increase of the balloon volume to 0.4 ml resulted in disappearance of peaks III, IV and V; AL of peak II was also elongated. However, the amplitude and AL of peak I remained unchanged. Similar changes were observed in IPLs. Conclusions. This study establishes the norm of parameters of ABR in guinea pigs and demonstrates that acute brainstem compression causes elongation of Als and IPLs of peaks Ⅱ, Ⅲ, Ⅳ and Ⅴ. This suggests that peaks Ⅱ, Ⅲ, IV and V come from the brainstem and that peak I is not generated from the brainstem in the guinea pig. |
本系統中英文摘要資訊取自各篇刊載內容。