醫院重癥監護病房細菌氣溶膠濃度水平影響因素研究
Influencing factors of bacterial aerosol concentration level in hospital intensive care units
摘要：
為研究影響醫院重癥監護病房(ICU)內細菌氣溶膠濃度水平的影響因素，對若干醫院ICU內的細菌氣溶膠濃度和粒子數進行了監測和分析。結果表明：在實際使用過程中，設置凈化器的萬級凈化室內環境中細菌氣溶膠濃度水平在萬級和十萬級凈化要求之間；無論是否設置凈化器，有人員活動組的細菌氣溶膠濃度均高于無人員活動組，在有人員活動情況下，凈化器可快速有效降低細菌氣溶膠濃度水平；有人員活動組的細菌中值直徑大于無人員活動組，有人員活動會增加大顆粒物數量；ICU環境中細菌氣溶膠濃度與粒徑≥0.5 μm粒子數、粒徑≥5 μm粒子數之間均有顯著關聯性。
Abstract：
In order to study the environmental factors that affect the concentration of bacterial aerosol in the hospital intensive care unit (ICU), the concentration and particle number of the bacterial aerosol in the ICUs of several hospitals are monitored and analysed. The results show that the bacterial aerosol concentration level in the 10 000-level purification indoor environment of the purifier during actual use is between the 10 000-level and 100 000-level purification requirements. Regardless of whether a purifier is installed, the concentration of bacterial aerosol in the group with personnel activities is higher than that without personnel activities. In the case of personnel activities, the purifier can quickly and effectively reduce the concentration level of bacterial aerosol. The median diameter of bacteria in the group with personnel activities is larger than that in the group without personnel activities, and the activities of personnel will increase large particles. There is a significant correlation between the bacterial aerosol concentration and the number of particles ≥0.5 μm and ≥5 μm in the ICU environment.
Keywords:hospital;intensivecareunit(ICU);purifier;bacterialaerosol;concentration;particlenumber;personnelactivity