外淋巴瘘(perilymphatic fistula)是指充满液体的内耳与含气的中耳和乳突腔之间的异常交通,其中圆窗膜和(或)环状韧带撕裂又称迷路(内耳)窗膜破裂。外淋巴瘘相关的症状较多,但大多缺乏特异性,最终确诊依靠中耳鼓室探查。随着影像学技术水平的提高,近20余年来,越来越多的学者们 Perilymphatic fistula refers to abnormal traffic between a fluid-filled inner ear and a gas-bearing middle ear and mastoid cavity, where tear of the round window membrane and / or annulus ligaments is also referred to as labyrinth (inner ear) window membrane rupture. Most of the symptoms associated with perilymphatic fistula, but most of the lack of specificity, the final diagnosis depends on the middle ear tympanometry. With the improvement of imaging technology, more and more scholars have been involved in the past 20 years