迷路瘘管常位于水平半规管处,其形成原因多与胆脂瘤内胶原酶的活性和受压程度有关。病变发展过程大致为患处骨质变薄,骨质吸收,瘘管形成,但外淋巴间隙与外界不沟通。当胆脂瘤基质侵及膜迷路,为削除胆脂瘤病变,可能导致外淋巴间隙与外界相通。为争取较理想的治疗效果,作者对迷路瘘管的治疗进行讨论。认为,手术治疗胆脂瘤性中耳炎时,应仔细检查水平半规管,以便了解有无迷路瘘管存在。为减少冲洗、吸引等操作对内耳的刺激,术时应先以显微剪刀将水平半规管处的胆脂瘤组织与鼓室等处病变分开,在清除病灶后,术野清洁,干燥时,于高倍显微镜下,清理瘘管处的胆脂瘤基质,并与膜迷路分离, Lost fistula often located in the level of semicircular canal, the formation of more reasons and more in the activity and degree of compression of the collagenase in cholesteatoma. The lesion development process is roughly the lesion bone thinning, bone absorption, fistula formation, but the outer lymphatic space does not communicate with the outside world. When the cholesteatoma matrix invasion and labyrinth of the disease, in order to remove the lesions of cholesteatoma, may lead to peripheral lymphatic space and the outside world. In order to strive for a better therapeutic effect, the authors discuss the treatment of labyrinthine fistula. That the surgical treatment of cholesteatoma otitis media, the level of semicircular canal should be carefully examined in order to find out whether there is lost fistula. In order to reduce flushing, to attract other operations on the stimulation of the inner ear, surgery should first micro-scissors to the level of semicircular canal at the cholesteatoma tissue and tympanic and other lesions at the separation of clear lesions, the operative field is clean and dry at high magnification Under the microscope, clear the fistula at the cholesteatoma matrix, and lost with the membrane labyrinth,