1000Hz声导抗测试豚鼠中耳积液

Study of 1000 Hz probe tone tympanometry on examination of fluid accumulation in tympanic cavity

目的分析用1000Hz探测音测试不同体积中耳内积液情况下的鼓室导抗,评价用高频探测音进行鼓室导抗检测在鼓室积液诊断中的作用。方法使用GSI33中耳分析仪对实验性中耳积液的白色豚鼠进行226Hz和1000Hz探测音的鼓室导抗测试,并对结果进行统计学分析。结果使用Graph Pad Prism 4.0统计软件进行统计学分析,结果显示所有实验组的鼓室峰压值均与对照组有显著性差异,且随着中耳积液量增加,鼓室导抗峰压值有降低的趋势。结论1000Hz探测音的声导抗检查可以反映中耳腔内的积液,鼓室导抗图曲线参数因中耳积液量不同而有差异。

OBJECTIVE To analyze 1000 Hz probe tone tympanometry of middle ear with different volume of fluid, and to evaluate the role of 1000 Hz probe tone tympanometry in the diagnosis of presence of fluid in tympanic cavity. METHODS Tympanometries with 1000 Hz or 226 Hz probe tone were obtained from all the guinea pigs with different volume of fluid in tympanic cavity using GSI33 analyzer and tympanometry curves were analyzed. RESULTS There was a significant difference of the peak pressure of 1000 Hz tympanometry among all test groups and control group. The peak pressure decreased with the increasing of fluid volume in tympanic cavity. CONCLUSION Tympanometry with 1000 Hz probe tone can be used in the diagnosis of fluid in tympanic cavity, and it can be an indicator of volume of fluid in tympanic cavity.