...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Indoor Air >Dispersion of exhaled droplet nuclei in a two-bed hospital ward with three different ventilation systems
【24h】

Dispersion of exhaled droplet nuclei in a two-bed hospital ward with three different ventilation systems

机译：带有三种不同通风系统的两病床病房中呼出的液滴核的扩散

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Effective ventilation in general hospital wards is important for controlling the airborne transmission of infectious respiratory diseases. Experiments have been carried out to increase our understanding of the interaction of the breathing flows of two individuals in a full-scale experimental hospital ward with three ventilation systems, i.e. mixing, downward and displacement ventilation. Two life-size breathing thermal manikins were used to simulate a source patient and a receiving patient. The exhalation jet from a bed-lying manikin was visualized using smoke. N_2O was used as tracer gas to simulate the droplet nuclei exhaled by patients; and the spatial distribution of its concentrations was measured. Our experimental results show that for both mixing and downward ventilation, the exhaled jet penetrates a short distance and is diluted quickly by ventilation air. The exhaled droplet nuclei are well mixed in the ward. Bed distance does not affect the personal exposure of the receiving patient. For displacement ventilation, the exhaled jet can penetrate a long distance. A high concentration layer of exhaled droplet nuclei because of thermal stratification locking has also been observed with displacement ventilation. This work is useful for identifying an appropriate ventilation method that can remove droplet nuclei more effectively and minimize the risk of cross-infections in a hospital ward environment.
机译：综合医院病房的有效通风对于控制传染性呼吸道疾病的空气传播很重要。已经进行了实验以增加我们对具有三个通风系统（即混合通风，向下通风和置换通风）的大型实验医院病房中两个人的呼吸流之间相互作用的了解。使用两个真人大小的呼吸热人体模型来模拟源患者和接收患者。使用烟雾将来自卧床人体模型的呼气喷流可视化。 N_2O被用作示踪气体以模拟患者呼出的液滴核。并测量其浓度的空间分布。我们的实验结果表明，对于混合通风和向下通风，呼出的射流可穿透一小段距离，并被通风空气迅速稀释。呼出的液滴核在病房中充分混合。床位距离不会影响接收患者的个人暴露。对于置换通风，呼出的射流可以穿透很长的距离。由于热分层锁定，在置换通气中也观察到了高浓度的呼出的液滴核。这项工作对于确定合适的通气方法是有用的，该方法可以更有效地去除液滴核，并使在医院病房环境中发生交叉感染的风险最小化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号