医院重症监护病房(ICU)是以危重病人为收治对象,研究病人危重期的机体各脏器病生理变化,给予全身加强和监护的单位。随着现代诊疗技术的发展,侵入性诊疗操作增多、抗生素的广泛应用、社会老龄化、免疫功能低下等因素的影响,医院内感染易感人群不断扩大〔1〕。入住ICU的患者多数 Intensive Care Unit (ICU) in hospital is a critically ill patient for the treatment of patients with critically ill patients organ disease physiological changes to give the whole body to strengthen and guard the unit. With the development of modern medical technology, invasive diagnosis and treatment operations increased, the widespread use of antibiotics, social aging, immune dysfunction and other factors, the hospital infected with the growing population of susceptible [1]. The majority of patients admitted to the ICU