层流洁净系统对支气管镜室内医护人员防护的效果评价

Evaluation of effect of laminar flow cleaning system on protection of health care workers in bronchoscopy room

    摘要
  • 摘要:
    目的 评价层流洁净系统对支气管镜室空气菌落的消毒效果和医护人员的防护效果。
    方法 2024年7月—2024年9月于温州医科大学附属第二医院进行实验采样，根据有无人员活动和采取的消毒系统不同，将实验分成四组：静态对照组、静态研究组、动态对照组和动态研究组，使用浮游菌法对静态和动态环境下支气管镜室空气菌落数进行采样，使用棉拭子采样医护人员体表菌落。
    结果 静态研究组0 h为(19.75±9.89)CFU/0.3 m3，1 h为(7.95±4.08)CFU/0.3 m3(P=0.012)，动态研究组0 h为(87.50±30.07)CFU/0.3 m3，4 h为(51.05±18.94)CFU/0.3 m3(P < 0.001)，静动态环境下研究组空气菌落数均下降。动态环境下两组在0 h(F=0.312，P=0.582)，在4 h(F=15.229，P=0.001)，除0 h外其余时刻研究组空气菌落数均低于对照组。0 h两组医护人员体表菌落均值比较无统计学差异，对照组4 h为(1.23±1.19)CFU/cm2，研究组4 h为(0.19±0.24)CFU/cm2(P=0.007)，对照组差值为(-0.77±0.99)CFU/cm2，研究组差值为(-0.09±0.16)CFU/cm2(P=0.032)，研究组医护人员体表菌落数增速小于对照组。
    结论 层流洁净系统能显著降低支气管镜室内空气菌落数，且能有效控制医护人员体表菌落的增加，能够为医护人员提供更好的职业防护。

     

    Abstract:
    OBJECTIVE To observe the effects of laminar flow cleaning system on disinfection of bacterial colonies 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/cm 2at 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.

     

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