Methods A group of patients injected medicine in two steps after setting up the veinous passway compared with the control group of traditional direct injection.

• 方法采用建立静脉通道后再注药的两步注射法与直接注射法进行对比研究。结果在医务人员接触药物时间、药物血管外漏及药物皮肤污染等方面，两种注射方法均有显著性差异。