对240耳的电生理学检查和临床观察，认为不存在自发性外淋巴展。外淋巴倭可以发生在术后，特别是横骨切除术后，还可以出现在头部外伤或是气压伤之后。但是这些外淋巴展很好治疗。长期性或间断性疾管在耳科甚为罕见。鼓室探查术中，特别是在局麻下手术时可能、起中耳渗液，这种 240 ears of electrophysiological examination and clinical observation, that there is no spontaneous lymphoid expanse. Peripheral lymphatic Japanese can occur after surgery, especially after transverse osteotomy, can also appear in the head trauma or after barotrauma. However, these extralymphatic lymph nodes are well treated. Long-term or intermittent disease in the ear is very rare. Tympanometry, especially under local anesthesia may be surgery, from the middle ear effusion, this