To evaluate the establishment and effectiveness of information monitoring  procedure of trocarassociated blood stream  infection, and test the stability, effectiveness and convenience of software.MethodsAccording to hospital information system (HIS), using the database oracle10.0 and programming tool powerbiuld 9.0, based on inserted catheter and project, the objective monitoring sofeware of nosocomial infection were explored and developed.Peripheral venous blood stream infection was included in monitoring system. 2 318 patients with  peripheral vein trocar between September and November, 2008 were studied. The distribution of departments and diseases, complications and retention time, the relationship between hypertonic and general liquids resulting in  complications were analysed.ResultsThe use of HIS realized  the data sharing,comprehensive data about retention trocar were captured from database quickly for  providing basic information  about  infection monitor.The results showed that trocars had been  widely used in patients receiving infusion at different departments and with different diseases; complications were related with retention time (P=0.000); there was significant difference in complications resulted from infusion of hypertonic and general liquid (P=0.000); there was no blood stream infection in this surveillance.ConclusionThis procedure can fully and quickly capture the information about indwelling peripheral vein, provide a basis for judging catheterrelated  infection, and guide  proper retention, strengthen infection control and reduce the incidence of complications.