30只豚鼠分为三组,每天注射庆大霉素60mg/kg,分别注射14天、21天和28天。间隔两周后处死动物作耳蜗与前庭的切片、铺片与扫描电镜观察。注射14天豚鼠内耳结构无明显变化;注射21天耳蜗底回出现死坏,椭圆 Thirty guinea pigs were divided into three groups. Gentamicin 60 mg / kg was injected daily for 14 days, 21 days and 28 days respectively. Two weeks after the animals were sacrificed for cochlear and vestibular sections, and tablets observed by scanning electron microscopy. There was no significant change in the structure of the inner ear of guinea pigs injected for 14 days. After 21 days of injection, the dead, oval