the sample consisted of 36 patients who were admitted in alassad and tishreen hospital between 2013-2016 with bacterial arthritis proved by clinical,radiological and laboratory methods. They went uder surgical intervention ,during it,a continuous irrigation system was accomplished according to designed plan. The irrigation period was 12 days (mean) with mean hospitalization period 12 days. Irrigation fluid was considered regarding to culture and susceptibility results in addition to antibiotic qualities .Results were collected depending on joint functional activitiy return regarding to capacity,bearing and stability(after a month-3 months- year),as well as natural laboratory and vlinical features return .we used the criteria healing (irrigation handout). The joint functional activity returned after a month in (70% mean) ,after 3 months in (77% mean), after a year in (89% mean).while the clinical infection signs fell back after a week in (85% mean) ,after a month in (92% mean), after 3 months in ( 97%). The laboratory signs fell back after a month in (91% mean), after 3 months in (97% mean). A comparing was achieved between these results and irrigation period ,hospitalization period by using CHI² test . The use of continuous irrigation system in treatment of bacterial arthritis once it is diagnosed (in regard to designed plan, irrigation fluid qualities and the host condition) improves the joint functional activity and reduces hospitalization period so that ,it lessens economic load and accelerates the return professional activity.