Method:Tympanic ostium of Eustachian tube was observed by tele-otoscope and the active and passive function of Eustachian tube were detected in 44 case of chronic otitis media(include 45 ears).

• 方法:用鼓室镜及咽鼓管功能检查仪对44例(45耳)慢性中耳炎患者,进行术前咽鼓管鼓室口观察和咽鼓管功能检查,并对检查结果进行对比分析。