Analysis on air microbial monitoring and influencing factors in clean operating rooms of 4 hospitals in Zibo city,Shandong province from 2016 to 2020
Objective To understand the status of air microbial load and its influencing factors in clean operating room of Zibo hospital,so as to provide a basis for improving the air quality of clean operating room in the next step.Methods In 2016 to 2020,202 laminar flow clean operating rooms in 4 monitoring point hospitals were selected for infection disinfec-tion monitoring in healthcare institutions in Zibo city,Shandong province,including 94 times under static conditions and 108 times under dynamic conditions.The sedimentation method and the plankton method were used to monitor the laminar flow clean operating room in 4 medical institutions in Zibo city under static and dynamic conditions for 5 consecutive years to detect the total number of bacterial colonies in the air,and analyze the influencing factors of unqualified air quality in clean operating rooms.Results The air quality compliance rates for clean operating rooms in healthcare facilities from 2016 to 2020 were 97.50％,92.50％,89.29％,92.50％,and 100.00％,respectively.Except for 100-grade operating rooms,statistically significant differences were observed in the total number of bacterial colonies detected by the sedimen-tation method and the planktonic method in 100,1 000,and 10 000-grade clean operating rooms under both static and dy-namic conditions(Z=-1.821,P=0.069).The results of the 2 sampling methods were correlated,but the correlation was weak(r=0.436,P＜0.05).The average qualified rate of air in 100 1000 and 10 000 clean operating rooms in medi-cal institutionswas 85.00％(51/60),95.00％(57/60)and 98.21％(55/56),respectively.The results of multiple linear stepwise regression analysis showed that the total number of bacterial colonies in 10 000 grade operating room was 10.65 times that of 100 grade operating room(OR=10.649,P=0.009),and the total number of bacterial colonies in plankton-method was 31.61 times that of sedimentation method(OR=31.609,P=0.000).Conclusion The air quality qualification rates of operating rooms in medical institutions in Zibo city varied across years and cleanliness levels from 2016 to 2020.The cleanliness level of operating rooms and the sampling method used are significant influencing factors for the air quality qualification rates of these facilities.
万方数据
维普
