DESIGN: a randomized control study.
设计：随机对照研究。
Methods A randomized control study of 100 cases in ICU was carried out in this hospital, they were divided into control group and intervention group with 50 cases in each group.
方法采用随机对照研究方法，将100例入住ICU患者分为对照组和干预组按常规护理50例。
Study Design. A prospective randomized control trial.
研究设计：一个前瞻性随机试验。
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