瑞芬太尼持续输注预防神经外科全麻拔管期不良反应疗效观察

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瑞芬太尼是一种新型的阿片μ受体激动剂,分布容积小,血脑平衡时间短。T1/2 kco 1~2min,因而起效快,又因为结构中含有酯键易被非特异性阻滞和血浆酯酶水解,故而消除速率快。长时间连续输入即时半衰期也仅为3~5min。shajar等研究认为手术结束时静注瑞芬太尼0.1μg/(kg·min)可减弱气管拔管时动脉压和心率的增加。
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