OBJECTIVE To explore the etiological characteristics of nosocomial infections in the patients with chronic obstructive pulmonary disease(COPD)and analyze the risk factors so as to provide guidance for clinical treatment and prevention.METHODS The clinical data of 350 COPD patients who were treated in the hospital from May2010 to May 2014 were retrospectively analyzed,then the incidence of nosocomial infections,infection sites,and distribution of pathogens were recorded,and the independent risk factors for t...