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題名 | 感音性聽障之變頻耳聲傳射=Distortion Product Otoacoustic Emissions of Sensorineural Hearing Loss |
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作 者 | 梁家光; 潘志超; 王智弘; | 書刊名 | 中華民國耳鼻喉科醫學會雜誌 |
卷期 | 32:5 1997.10[民86.10] |
頁次 | 頁77-83 |
分類號 | 416.812 |
關鍵詞 | 變頻耳聲傳射; 變頻耳聲傳射圖; 輸入/輸出函數曲線; 感音性聽障; Distortion product otoacoustic emission; Distortion-productgram; DP-gram; Input-output function curve; Sensorineural hearing loss; |
語文 | 中文(Chinese) |
中文摘要 | 背景:為了作為日後臨床應用的基準,本研究測量分析感音性聽障耳之變頻耳 聲傳射特性。 方法:在19側感音性聽障耳使用相同強度的雨刺激音,誘發記錄2f1-f2頻率之變頻耳 聲傳射,以不同刺激音量求得自0.5至8 kHz,每1/2八度音頻率的變頻耳聲傳射圖及輸入 /輸出函數曲線,並探討變頻耳聲傳射閾值與純音聽力閾值的相關性。 結果:以70 dB SPL刺激音量在不同聽閾求得的平均變頻耳聲傳射強度約為-0.25至- 11.3 dB,如果變頻耳聲傳射的強度小於0 dB,則聽閾就劣於30 dB HL。輸入/輸出函數曲 線分布,以線性的兩點型及低反應單段型為最多,若加上無反應者,即佔了全部記錄的9 %以上。各單頻純音聽力閾值與變頻耳聲傳射閾值間的相關係數(correlation coefficient)由0.09至0.807,其中以1.5及2 kHz間的相關係數最高。 結論:變頻耳聲傳射可用來作為輕、中度聽障耳外毛細胞受損後的殘餘耳蝸功能評估 ,也可作為聽力篩檢的工具之一。 |
英文摘要 | Backgroud: For observing the potential of distortion product otoacoustic emissions (DPOAEs) in clinical use, we study the characteristics of DPOAEs in ears of sensorineural hearing loss. Methods: Distortion product otoacoustic emissions at the 2fl-f2 frequency were recorded from 19 ears of sensorineural hearing loss. We recorded Dpgrams and input-output functional curves in 1/2 Octave steps from 0.5-8 kHz at different primary tone levels. In addition, we checked the relationship between visible thresholds of DPOAEs and thresholds of pure tones. Results: The average amplitudes of DPOAEs were -0.25 to -11.3 dB with 70 dB SPL stimuli. The recorded amplitude of DPOAE was less than 0 dB from ears with hearing thresholds higher than 30 dB. Most input-output function curves were linear and low response (e.g. singlesegment, two-point curves and no response). The correlations between thresholds of DPOAEs and pure tones were low. However, higher correlations were found in measurements of 1.5 and 2kHz. Conclusions: According to our results, DPOAE-recording could be useful for estimating residual cochlear function in ears of mild and moderate sensorinerual hearing loss. It can also be one of effective tools for hearing screening. |
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