Effects of circulated air disinfection and ultraviolet radiation on disinfection of air in burn unit

OBJECTIVE To probe into the effects of air disinfection in burn unit made by circulating wind and ultraviolet radiation so as to provide basis for the safe,highly effective,and convinient air disinfection and to reduce the air pollutior.METHODS The spot experiments were carried out in the burn unit to test the air disinfection effects made separately by circulating wind machine and ultraviolet lamp,which were two implements for air disinfection,the air was sampled in the burn unit to analyze and compare the bacteria-killing rates of the two methods at three stages immediately after disinfection,30 minutes and 60 minutes in the room where a person stayed.RESULTS As compared with the bacterial colony counts of the circulating wind(856±99)CFU/m3 and ultraviolet(860±100)CFU/m3 before the disinfection,the difference was not statistically significant.The bacterial colony counts of the circulating wind(102±35)CFU/m3 was significantly less than that of the ultraviolet(134±42)CFU/m3,the difference was statistically significant(P0.05).The difference in the bacterial colony counts before and after the disinfection between the two groups was statistically significant(P0.05).CONCLUSION Both of the two disinfection methods can achieve the disinfection effect,and the circulating wind can achieve more lasting disinfection effect and thus is more suitable for the disinfection of air in the burn unit.