| 外淋巴钙离子对畸为产物耳声发射的影响 |
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| 引用本文： | 李克勇,王直中.外淋巴钙离子对畸为产物耳声发射的影响[J].中华耳鼻咽喉科杂志,1998,33(2):75-77. |
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| 作者姓名： | 李克勇 王直中 |
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| 摘 要： | 目的 研究外毛细胞运动产生畸产产物耳声发射（ＤＰＯＡＥ）的机理。方法 观察９只豚鼠（１１耳）采用无钙和有钙的人工外淋巴灌流外淋巴腔后ＤＰＯＡＥ的变化。结果 用无钙人工外淋巴灌流后ＤＰＯＡＥ的均值从４１．３ｄＢＳＰＬ降至１３．７ｄＢＳＰＬ，再用正常钙浓度的外淋巴灌流后又可回升到３６．７ｄＢＳＰＬ结论 ＤＰＯＡＥ的产生需外淋巴强正常浓度的钼离耿必要条件。提示外毛细胞在产生ＤＰＯＡＥ中并非以毛细胞的电运
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| 关 键 词： | 外淋巴 钙 耳声发射 自发性 |
The effect of calcium ion in perilymphatic fluid on guinea pig's distortion product otoacoustic emissions] |
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| K Li,Z Wang,K Cao.The effect of calcium ion in perilymphatic fluid on guinea pig''s distortion product otoacoustic emissions][J].Chinese Journal of Otorhinolaryngology,1998,33(2):75-77. |
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| Authors: | K Li Z Wang K Cao |
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| Institution: | Shanghai First People's Hospital, Shanghai 200080. |
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| Abstract: | OBJECTIVE: To study the mechanism of the production of distortion product otoacoustic emissions (DPOAE) by electromobility of out hair cell. METHODS: The changes of nine gninea pig's DPOAE by means of perfusion of artificial perilymphatic fluid with and without calcium ion were observed. RESULTS: The mean value of DPOAE decreased from 41.3 dB to 13.7 dB after perfusion of fluid devoid of calcium ion, it revived to 36.7 dB after reperfusion with normal perilymphatic fluid. The result supports Pickle's muscle theory for DPOAE's mobile mechanism and does not support Brownell's electromobility theory. CONCLUSION: A normal concentration of calcium ion in perilymphatic fluid is necessary for outer hair cell to produce DPOAE. |
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