ICU的老年患者,因原发病重,基础病多,且常伴有营养不良或免疫功能低下等特点,加之各种侵入性操作,不合理使用抗生素、肾上腺皮质激素、脱水剂和镇静剂等药物,以及医务人员不规范洗手等因素,因而发生院内感染的机率较其他病室的患者要高出5～10倍。综合上述因素,为了有效控制 ICU elderly patients, due to the primary disease, basic disease and more often accompanied by malnutrition or immune dysfunction and other characteristics, coupled with a variety of invasive operations, unreasonable use of antibiotics, adrenal hormones, dehydration and sedatives and other drugs , And medical staff do not regulate the hand washing and other factors, resulting in nosocomial infections in patients with other wards than the patients to be 5 to 10 times higher. Based on the above factors, in order to effectively control