结论：异丙酚能有效地减轻插管时心血管应激反应，是高龄癌症患者的良好的全麻诱导药。
Conclusion: Propofol reduced the haemodynamic response effectively in the anesthesia induction in elderly cancer patients.
目的为在气管插管时减轻心血管应激反应和维持血流动力学稳定，选出尼卡地平的理想剂量。
Objective To determine the optical dose of nicardipine(N) for the hemodynamic stability and less cardiovascular stress response during the pre - postintubation period.
结论：HANS可以减轻甲状腺肿瘤患者手术时产生的心血管应激反应，同时有强化麻醉的作用。
Conclusion Cardiovascular stress response can be decreased with HANS in the operation of thyroid tumors and anesthetic effect can be strengthened.
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