双盲实验是指被试和实验者都不知道哪些被试接受哪一处理的实验技术。
设计：完全随机双盲实验对照研究。
DESIGN: a completely randomized, double blind controlled trial was conducted.
该装置可以用于在双盲实验，并也由单个操作员操作。
The device can be used in double-blind experiments, and also operated by individual operator.
方法针对88例慢性阻塞性肺疾病稳定期合并营养不良的患者进行了随机非双盲实验。
Methods A randomized controlled unblined trial was performed in 88 patients with COPD who were malnutrition.
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