作者们对治疗胆脂瘤时引起的迷路瘘管及其骨导听力好转或下降的原因进行了研究。氏等认为:将瘘管封闭及重建小听骨,可使声音传导正常,并可创造较好的机械条件,使感音性听力好转。此外,去除胆脂瘤基质亦可预防瘘管处耳蜗中毒与退化。有关迷路瘘管的治疗,氏等主张分两期作经外耳道-乳突相结合的鼓室成形术。第 The authors investigated the reasons for the improvement or decline of the lost fistulas and their bones’ leads in the treatment of cholesteatoma. ’S view that: the fistula closed and reconstruction of small bone, make the sound conduction is normal, and can create better mechanical conditions, so that sensory hearing improvement. In addition, the removal of cholesteatoma matrix can prevent cochlea poisoning and degeneration at the fistula. On the treatment of labyrinth fistula, and so advocated in two phases through the external auditory canal - mastoid tympanoplasty combined. No.