Visual analogue scale(VAS) was used to observe analgesic time and effect during treatment in each group.
分组治疗中采用视觉模拟评分法观察止痛时间和止痛效果。
Methods the analgesic effect was compared with hot board method and the toxicity was compared with fatal time.
方法热板法比较镇痛效果，致死时间比较毒性。
Two groups were compared with the rate of tracheotomy, ICU stay time, mechanical ventilation, ventilator-associated pneumonia incidence, the time of analgesic use and other indicators.
比较两组气管切开率、入住icu时间、机械通气时间、呼吸机相关性肺炎发生率、镇痛剂使用时间等指标。
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