Objective To analyze the clinical anesthesia effect of sevoflurane in elderly patient by the monitoring of Nacotrend. Methods Randomly divide 80 ASAI-III elderly patient which were carried out surgery in general anesthesia into experimental group and control group. The sevoflurane quality of 40 patients in experimental group were monitored by Nacotrend, and the quali-ty of sevoflurane of 40 patients is not monitored. Contrast the anesthesia induction period, lasting period, awakening time, the sevoflurane quality, the Bispectral Index, etc of the two groups. Results The nesthesia induction period and awakening time of ex-perimental group is much shorter than that of control group, the Bispectral Index of experimental group is higher, and the sevoflu-rane quality of experimental group is less than that of control group. P<0.05, The difference is statistically significant. Conclusion Narcotrend monitoring the general anesthesia inducing progress of elderly patient can control the intaking sevoflurane quality ex-actly, and avoid the overanesthesia.%目的：对Narcotrend监测下七氟醚用于老年患者全麻诱导的临床效果进行研究。方法将我院80例ASAI-III级于全麻下进行手术的老年患者分为实验组和对照组，实验组40例，实验组采用Narcotrend监测七氟醚的吸入量，对照组全凭患者吸入。对比两组的麻醉诱导时间、持续时间、苏醒时间，以及麻醉结束后的呼气未稳态、脑电电测指数以及七氟醚用量。结果实验组患者的麻醉诱导时间为（0.79±0.11）min苏醒时间为（31.4±7.90）min，对照组分别为（0.88±0.12）min与（30.8±9.4）min，实验组对照组患者有明显缩短，呼气未稳状态明显低于对照组，脑电监测指数明显高于对照组，七氟醚用量明显少于对照组， P<0.05，差异具有统计学意义。结论 Narcotrend应用于老年患者全麻诱导过程中能够准确控制七氟醚吸入量，有效减少七氟醚用量，以免出现过度麻醉现象。
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