声导抗基础知识.pptVIP

声导抗基础知识培训 Tympanometry and Acoustic Reflex Measurements 鼓室声导抗和声反射测试 +Infant test recommendations 婴儿测试的推荐方法 Getting sound into a different medium声音在不同媒介中的传导 The Ossicles 听小骨 Getting sound into a different medium声音在不同媒介中的传导 中耳测试 精密的中耳系统 高精度的测试 高质量控制系统 鼓室图 The Middle ear - Immittance tests 中耳声导纳测试 Stapedius muscle controlled by facial nerve (CN VII) 镫骨肌由第七对颅神经－面神经支配 Network in brainstem consists of ipsilateral and contralateral paths 脑干层面由同侧和对侧神经通路组成 Reflex activated on both ears, even when stimulation only occurs in one ear 一侧耳受到刺激时，双侧镫骨肌都会收缩 Comparison of ipsilateral vs. contralateral acoustic reflexes helps to determine site of lesion 对比同侧和对侧声反射有助于判断病变部位 声反射 声反射测试 – 高精度的挑战 鼓膜处压力为TPP值时中耳蹬骨肌反射状 况最佳 正确的声反射是刺激音引起导纳在TPP处 的变化 耳道或中耳压力的改变导致错误的声反射 对于鼓膜活动度过大可进行TPP补偿 Now I can see not only how easily I can move the system, but I can actually find out why! 现在我不仅能轻而易举的推动它，而且还明白了其中的原因！ Susceptance and Conductance magnitudetympanometry 声导与声纳 Traditional baseline compensation Ear canal effect at +200 daPa CCSA is not calculated through simple ECV subtraction, but through compensating the B and G components individually before putting them together CCSA不是简单减去ECV得到的，而是分别对声导和声纳补偿后再相加计算出来的 CCSA Component Compensated Static Admittance成分补偿声导纳 CCSA Middle ear assessment in infants, recommendations婴儿中耳评估的推荐方法 Low frequency probe tone tympanometry is unreliable in infants and should not be used 低频探测音由于鼓室声导抗测试结果不可靠，不推荐使用于婴儿 1000 Hz probe tone is preferable to 678 Hz 1kHz探测音优于678Hz A low peak, below 1000 Hz norm data range, or no peak at all is likely due to effusion 低于1kHz正常数据范围的低峰或无峰的测试结果提示中耳积液 Reflex testing in infants: 婴儿声反射测试 1000 Hz probe tone 1kHz探测音 ipsilateral stimulation 同侧刺激音 broadband noise stimulus 宽带噪声刺激音 Combine 1000 Hz tympanometry and reflex testing 将1kHz鼓室声导抗与声反射测试相结合综合判断 The ear receives the sound wave which is pressure variations in the air. These pressure variations reach the ear drum, the tympanic mem