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全麻诱导插管期常诱发体内交感活性增高，致使病人产生一过性的心率和血压增高，使心肌耗氧量增加，对一些病人存在着心肌缺血和脑血管意外的潜在危险。近年来，曾探讨过多种方法在不同程度上减轻了此副反应，但都存在一定的不足［’。盐酸文司洛尔是超短效的pl受体阻滞剂，它
General anesthesia induced intubation often induces increased sympathetic activity in vivo, resulting in a transient heart rate and blood pressure in patients with increased myocardial oxygen consumption, for some patients there is a potential risk of myocardial ischemia and cerebrovascular accidents. In recent years, many methods have been explored to reduce the side effects to varying degrees, but there are some shortcomings [’. Wendolol hydrochloride is an ultra-short-acting pl receptor blocker