To establish animal model of guinea pig with gentamicin ototoxicity, judging by checking of auditory brainstem response(ABR)before and after being injected. 2.

• 目的 1.；建立庆大霉素耳中毒的药物性耳聋的豚鼠动物模型，检测用药前后听性脑干反应（ABR）的变化，判断模型是否建立成功。