Purification effect of air aerosols in digestive endoscope cleaning and disinfection room under different ventilation and disinfection modes
10.11816/cn.ni.2025-241724
- VernacularTitle:消化内镜清洗消毒室不同通风消毒模式下空气气溶胶净化效果
- Author:
Sijin YAN
1
;
Yan SONG
;
Feng LU
;
Shiwen HUANG
;
Jiayan DING
;
Mei HUANG
;
Xiaofang FU
;
Lina ZHAO
;
Yan ZHANG
;
Haiqun BAN
Author Information
1. 上海交通大学医学院附属仁济医院感染管理办公室,上海 200127
- Publication Type:Journal Article
- Keywords:
Digestive endoscope cleaning and disinfection room;
Air conditioning system;
Recirculating air disinfec-tion machine;
PM0.5;
Microorganism
- From:
Chinese Journal of Nosocomiology
2025;35(13):2040-2044
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE To investigate the changes of air aerosols in the digestive endoscope cleaning and disinfec-tion room under real working conditions and observe the purification effects of aerosols under different ventilation and disinfection modes.METHODS Under the real working conditions(with both the air conditioner and recircu-lating air disinfection machine under the working mode),the air samples were collected every 1 hour from 8:00 to 16:00 from the digestive endoscope cleaning and disinfection room of Ren Ji Hospital,Shanghai Jiao Tong U-niversity School of Medicine from May 2023 to Oct.2023;the contents of particulate matters(PM)and microor-ganisms in the air were detected.At the busiest moment of the cleaning and disinfection room,the air was respec-tively sampled from the cleaning and disinfection room with the working condition modes of air condition systems,recirculating air disinfection machine or natural ventilation before the starting of systems and after the work for 0.5 hour,1 hour and 2 hours.The contents of PMs and microorganisms were detected.RESULTS The PM0.5 con-centrations during various time periods met the Grade 9 ISO clean room standard(≤35,200 particles/L)under the real working conditions,and the content of airborne viable particles also conformed to the Class Ⅲ environmental requirements(≤500 CFU/m3).All of the three ventilation and disinfection methods showed certain effects on purification of the con-tents of PM0.5 and microorganisms after the ventilation for 2 hours,the contents of PMs and microorganisms of the air disinfection machine group decreased most remarkably,followed by the air conditioner group,the natural ventilation group the least.There were no significant differences in the PM concentration and the content of microorganisms among the three groups at the time points;there were only significant differences in the PM concentration and the content of mi-croorganisms of the air disinfection machine group after the ventilation for 2 hours,0.5 hour and 1 hour(P＜0.05).CONCLUSIONS Both the air conditioning systems and recirculating air disinfection machine under the working con-dition mode have certain effect on purification of the contents of PM and microorganisms,and the specific effect need to be further studied.The implementation of multicenter dynamic surveillance with the help of intelli-gent techniques may provide reference for the optimization of ventilation and disinfection strategies.
