Evaluation of effect of laminar flow cleaning system on protection of health care workers in bronchoscopy room
10.11816/cn.ni.2025-246779
- VernacularTitle:层流洁净系统对支气管镜室内医护人员防护的效果评价
- Author:
Jing HU
1
;
Lizheng GE
;
Songjia ZHANG
;
Ming SHEN
;
Ye CHEN
;
Zhongyan ZHAO
;
Chun CHEN
;
Chenchen CHEN
Author Information
1. 温州医科大学附属第二医院内镜中心,浙江温州 325000
- Publication Type:Journal Article
- Keywords:
Bronchoscopy room;
Laminar flow cleaning system;
Medical protection;
Bacterial colony count;
Effect evaluation
- From:
Chinese Journal of Nosocomiology
2025;35(21):3330-3333
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE To observe the effects of laminar flow cleaning system on disinfection of bacterial colo-nies in the air of bronchoscopy room and on protection of the health care workers.METHODS The specimens were collected for laboratory test from the Second Affiliated Hospital of Wenzhou Medical University between Jul.2024 and Sep.2024 and were divided into four groups according to the status of personnel activity and the disinfection system:the static control group,the static study group,the dynamic control group and the dynamic study group.The bacterial colonies were collected from the air of bronchoscopy room under the static and dynamic state by planktonic bacteria method,and the bacterial colonies were collected from the body surfaces of health care workers with the use of cotton swab.RESULTS The bacterial colony counts were(19.75±9.89)CFU/0.3 m3 in the static study group at 0 h,(7.95±4.08)CFU/0.3 m3 at 1 h(P=0.012);the bacterial colony counts were(87.50±30.07)CFU/0.3 m3 in the dynamic study group at 0h,(51.05±18.94)CFU/0.3 m3 at 4h(P＜0.001);the bacterial colony counts declined in the study groups under both static and dynamic state.The bacteria colony counts of the two groups were(F=0.312,P=0.582)at 0 h under the dynamic state,(F=15.229,P=0.001)at 4 h;the bacterial colony counts were lower in the study group than in the control group at the rest of time points except for 0 h.There was no significant difference in the average bacterial colony counts on body surfaces of health care workers between the two groups at 0h;the bacterial colony counts of the control group were(1.23±1.19)CFU/cm2at 4 h,the study group(0.19±0.24)CFU/cm2(P=0.007);the difference value was(-0.77±0.99)CFU/cm2 in the control group,(-0.09±0.16)CFU/cm2(P=0.032)in the study group;the bacterial colony counts on body surfaces of the health care workers were increased less remarkably in the study group than in the control group.CONCLUSION The laminar flow cleaning system can remarkably reduce the bacterial colony counts in the air of bronchoscopy room,effectively control the increase of bacterial colonies on the body surfaces of health care workers,and offer better occupational protection of health care workers.
