SURVEY ON BACTERIAL CONTAMINATION OF CLINICAL OXYGEN HUMIDIFYING BOTTLES IN HOSPITAL

Objective To investigate bacterial contamination of oxygen humidifying bottles and explore the pollution prevention and control measures.Methods Cotton swab smear method was used for on-site sampling and bacterial detection to investigate bacterial contamination of humidified and un-humidified low-mid volume(≤4 liters) oxygen humidifying bottles with oxygen therapy by nasal cannula for more than 24 hours.Results Bacterial contamination rates of in-use oxygen humidified bottles by 8 hours and 24 hours were respectively 49.2% and 57.5% in 120 samples of each timing,while bacterial contamination rates of in-use oxygen un-humidified bottles by 8 hours and 24 hours were 35.0% and 44.2% respectively in 120 samples of each timing.Staphylococcus,Enterobacter,spores,and fungus were the main growth of bacteria.Conclusions Bacterial contamination of in-use oxygen humidifying bottles is serious.The contamination rate was significantly higher in humidified group than that in un-humidified group and the pollution was more serious as the duration extended.