RESEARCH ON THE DISINFECTION EFFICACY AND SAFETY OF A DISINFECTION MACHINE FOR INTERNAL RESPIRATORY PIPELINE OF ANESTHESIA MACHINE

Objective To observe the germicidal efficacy and safety of a disinfection machine for internal respiratory pipeline of anesthesia machine.Methods Physicochemical analytic method and carrier quantitative germicidal test were used to observe the germicidal efficacy and safety of the disinfection machine.Results The concentrations of hydrogen peroxide and ozone in the disinfection pipeline were 304 mg/m3 and 135 mg/m3 respectively after the disinfection were performed for 15 min.In the whole program,the concentration ranges of hydrogen peroxide and ozone were 209 mg/m3 to 303 mg/m3,95 mg/m3 to 134 mg/m3,respectively.The average killing logarithm values of Bacillus subtitle var.niger spores on stainless steel carrier and silica gel carrier exposed to disinfection for 60 min were both over 4.00.The average concentrations of hydrogen peroxide and ozone in the environment were 0.16 mg/m3 and 0.03 mg/m3 respectively.Conclusion The disinfection machine applied with combined hydrogen peroxide and ozone can kill Bacillus subtitle var.niger spores on different carrier,and the doses of residual disinfectants are in the safe range.