咽鼓管异常开放症（abnormalpatienceofeustachi－antube）临床误诊漏诊率较高的原因是许多患者临床症状不典型，而单一的检查方法阳性率较低，所以，如何根据客观检查确诊并与咽鼓管阻塞相鉴别就成为诊断中的关键问题。为此，我们运用声阻抗仪、声测仪、电耳镜、纤维鼻咽镜结 The reason for the higher misdiagnosis rate of clinical misdiagnosis in many patients with abnormalpatienceofeustachi-antube is that the clinical symptoms are not typical in many patients, and the positive rate of single testis is low. Therefore, how to diagnose and obstruct eustachian tube obstruction according to objective examination? Phase identification has become the key issue in diagnosis. To this end, we use acoustic impedance meter, acoustic detector, otoscope, fiber nasopharyngeal junction