Study On Particle Counting Characteristics Of Aerosols In Hospital Clean Operating Department

Authors

  • Ningbo Zhan, Feng Chen, Taihu Wu , Binfang Ling, Zhen Yang, Xiaobo Zhan, Zhi Cheng

Abstract

We conducted the counting detection of scattered particles and biological fluorescent particles in the operating room, clean corridor, buffer zone, office and outdoor environment, analyzed the counting concentration and evaluated particle size distribution, biological particle and total particle consistency in order to illuminate the aerosol counting characteristics of hospital clean operating department. The results showed that: ?The scattered particle counting concentration at each sampling point was consistent with that of biological particle counting (P<0.05), and the former is generally an order of magnitude higher than the latter. ?There was a significant correlation between scattered particle counts and biological particle counts over time at each sampling point (P <0.05), and counting results were highly sensitive to environmental changes, especially to human activities. ?Scattered particles decrease significantly with the increase of particle size in unclean environments, among which 0.5?m (>89.0%) was the most and 10?m (<0.1%) was the least. There were significant correlations among clean corridor, buffer zone and unclean environments (P <0.05). The operating room showed more particles of 2?m (25.7%) and 0.5?m (25.6%), and the least of 5?m (5.6%). ?There was a significant correlation between the biological particle size distribution in clean corridor and operating room(P <0.05), among which 2?m (>27.5%) was the most and 10?m (<7.1%) was the least. The biological particle size distribution was significantly correlated with that of scattered particle in unclean environments (P <0.05). The buffer zone showed a transitional state, among which 0.5?m (55.8%) was the most and 2?m (15.6%) followed. ?The proportion of biological particles in clean environments was higher than that of unclean environments, among which operating room (24.6%) was the highest and outdoor environment (5%) was the least. The proportion of biological particles in large channels was higher than that of small channels. Particle counting characteristics of aerosols can provide a new method for the air quality standards establishment and risk assessment of clean operating department.

Published

2020-12-29

Issue

Section

Articles