小儿气管异物是耳鼻喉科的常见病,病情较危急,需行支气管镜检异物取出术。此手术有以下特点:①婴幼儿为主,不能配合;②必须保留自主呼吸,又需一定程度的肌松;③麻醉和手术共用同一气道。因此对麻醉要求较高。同时,此类手术时间一般较短,为此需要一种具有诱导起效快、苏醒快、插 Pediatric tracheal foreign body is a common disease of otolaryngology, the condition is more critical, the need for bronchoscopy foreign body removal. The surgery has the following characteristics: ① infants and young children mainly can not cooperate; ② must keep spontaneous breathing, but also to a certain degree of muscle relaxation; ③ anesthesia and surgery share the same airway. Therefore higher requirements for anesthesia. At the same time, such surgery time is generally shorter, for which a need to have a fast onset of induction, wake up fast, plug