ABSTRACT
Objective To observe air disinfection efficacy of ultraviolet ray,ozone disinfector,and circulating air disinfector in outpatient blood collection room.Methods Air in outpatient blood collection room was disinfected by ultraviolet ray,ozone disinfector,and circulating air disinfector,air specimen was taken before and after air disinfection,as well as after 1,2,3,and 4 hour working condition of staff,efficacy of 3 disinfection methods were compared.Results Under static condition,there was no significant difference in average colony forming unit(CFU) among 3 disinfection methods(P =0.317),the average CFU in air which disinfected by ultraviolet ray and ozone disinfector increased rapidly after the entry of personnel,the number of air colony did not meet the requirements of category Ⅲ environmental sanitation standard after staff worked for 2 hours;circulating air disinfector could continuously disinfect after the entry of personnel,the average CFU met the requirement of category Ⅲ environmental sanitation standard after staff worked for 1,2,3,and 4 hours;there were significant difference in the CFU among different disinfection methods(F =211.00,P＜0.001),there were significant difference in CFU at different sampling time(F =272.95,P＜ 0.001).Conclusion Circulating air disinfector can meet the requirements of category Ⅲ environmental sanitation standard during the working condition of staff,and is suitable for air disinfection in outpatient blood collection room.
ABSTRACT
Objective To compare disinfection efficacy of three different air disinfection methods on the air in blood collection room.Methods Air disinfection in blood collection room was conducted by ultraviolet (UV)light, ozone disinfector (OD)and air purification disinfector respectively ,natural sedimentation method was used to take air specimens before ,after disinfection ,and during working condition of staff ,air disinfection efficacy was detec-ted.Results All three methods could decrease air bacterial count after disinfection ,the total number of bacteria in indoor air after disinfection met the class Ⅲ environmental requirement.Under working condition of staff ,the num-ber of bacteria of OD and UV light group increased rapidly,at 4 hours was (7.53±1.28)CFU/5 min·Φ90petri dish and (8.16±1.57)CFU/5 min·Φ90petri dish respectively;air purification disinfector disinfected for 4 hours under the condition of movement of personnel in blood collection environment,bacteria count still remained <4.0 CFU/5 min·Φ90petri dish.Conclusion Disinfecting continuously by air purification disinfector can ensure the effectiveness of air cleanliness in blood collection room.