Nakai Y, Sakashita T, Kubo T, Yamane H, Masutani H, Kato A, Iguchi H, Takayama M, Ito J
Department of Otolaryngology, Osaka City University Medical School, Japan.
ORL J Otorhinolaryngol Relat Spec. 1997 Jul-Aug;59(4):230-4. doi: 10.1159/000276943.
A 66-year-old man with profound total deafness received a 22-channel cochlear implant. After surgery, his hearing improved and the postoperative course was uneventful except transient vertigo. The patient died of lung cancer after 2.5 years. Twelve hours after death, the temporal bone was harvested for histological and electron microscopic examination. The mastoid air cells were preserved, although a few mucosal folds were present. The Dacron mesh tie had largely been absorbed, but part remained embedded in fibrous tissue. No inflammation was noted in the tympanic cavity or the round window through which the electrodes were inserted. In the cochlea, the scala tympani was filled with fibrous tissue at the site of electrode insertion. The scala media had collapsed, while the organ of Corti and stria vascularis showed degeneration. Osseous spiral bundles and spiral ganglion cells were noted, though reduced in number.
一名66岁的完全性重度耳聋男性接受了22通道人工耳蜗植入手术。术后，他的听力有所改善，除了短暂性眩晕外，术后过程平稳。该患者在2.5年后死于肺癌。死亡12小时后，取出颞骨进行组织学和电子显微镜检查。乳突气房得以保留，尽管存在一些黏膜皱襞。涤纶网带大部分已被吸收，但部分仍嵌入纤维组织中。在插入电极的鼓室或圆窗未发现炎症。在耳蜗中，鼓阶在电极插入部位充满了纤维组织。中阶塌陷，而柯蒂氏器和血管纹显示退变。可见骨螺旋束和螺旋神经节细胞，但其数量减少。
