中耳保护功能与迷路膜破裂

作者对40例突聋患者进行鼓室探查发现窗膜破裂殊为少见,当与中耳保护功能有关;但是窗区微裂并外淋巴瘘反较多见,其临床诊断与病理组织学特点深值进一步研究。中耳保护功能的机制是听骨链系统的反馈效应。

The Relationship between the Protective Function of the Middle Ear and the Labyrinthine Membrane Rupture

This paper reports 40 cases of sudden hearing loss, the cause of which was unknown in 19 cases and which was caused by injuries in 21 cases. Exploratory tympanotomy showed spontaneous oval-window fistula in 1 case, traumatic oval-window fistula in 2 cases, microperilymph fistula in 3 cases, mucosal haemorrhage of the round-window area in 2 cases and tympanik muscle defect in 1 case. In the present study, we found less labyrinthine membrane rupture than others reported, Our studies show that the protective function of the middle ear may protect the membrane from rupture. The priciple and mechanism of this function seems that the middle ear has biofeedback effect, by which it can control the direction and the action point of the hydrodynamic and aerodynamic force. Spontaneous rupture of the microfissure in the window area is similar to a Iymphatic "shunt" procedure performed on a patient with Menier's disease.