中耳炎隐蔽性发病的病理因素探讨

Silence nature of otitis media

为探讨中耳炎的隐蔽性发病的病理因素，用光镜对306耳各型中耳炎额骨连续切片，进行组织病理学观察研究和临床资料复习。结果示，绝大多数（81．0％）中耳炎病变过程中缺少临床症状。提示咽鼓管功能的亚正常状态和中耳炎时的低度感染，可能是中耳炎病理过程隐蔽的基本原因；中耳通风引流系统的解剖学特点和炎性病变引起的内通风引流阻塞，导致渗出液在中耳后都区域积存，可能是形成顽固性病变和慢性中耳炎病理过程隐蔽性发病的重要因素。

To explore the silence nature of otitis media,the temporal bone slides from 306 ear with various types of otitis media were studied histopathologically under the light microscopy and their case historys were reviewed at the Otopathology Laboratory,the University of Minnesota Otitis Media Research Center U. S. A. The results showed that 80. 97% of otitis media cases lacked clinical symptoms in pathologic process. The subnormal function status of the eustachian tube and the low-degree infection in pathologic process of otitis media probably are basic causes of silence nature of otitis media. The anatomic speciality of ventilation/drainage system of middle ear cleft and the inflammatory pathologic change causing obstruction of internal ventilation/drainage system and leading to the retention of effusion in posterior areas of middle ear cleft maybe are important factors for the development of obstinate pathologic change and silence nature of pathologic process of chronic otitis media.