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This study presents the development and evaluation of a mobile local exhaust ventilation (LEV) unit designed to protect healthcare workers (HCWs) during aerosol-generating procedures (AGPs) in infectious disease scenarios. The newly developed horn-shaped hood was optimized for intake velocity uniformity and particle capture efficiency. Computational Fluid Dynamics (CFD) simulations and experimental analyses demonstrated a 22% reduction in particle concentration in the HCW’s breathing zone compared to conventional designs. The integration of supply airflow significantly enhanced the Air Curtain effect, effectively blocking particle dispersion and maintaining stable indoor airflow. The experimental setup included airflow visualization, intake velocity measurement, and Particle Image Velocimetry (PIV) to assess the hood’s performance under varying conditions, such as hood height, coughing angles, and supply airflow rates. Results showed that the improved hood minimized particle recirculation and provided a consistent airflow pattern, addressing limitations of conventional hoods. The LEV unit’s mobile design ensures adaptability in various medical environments, offering effective containment of infectious aerosols while maintaining patient comfort. This system represents a viable engineering solution to enhance infection control measures and safeguard HCWs during pandemics and emergencies, highlighting the importance of integrated supply-and-exhaust systems in healthcare settings.

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Development of a Mobile Local Exhaust Ventilation Unit for Protecting Healthcare Workers Responding to Infectious Diseases

  • 会议论文

  • 发表日期：

    2026年

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  • Jinkyun Cho,
  • Wonseok Oh,
  • Joo Hyun Moon,
  • Jeongan Park,
  • Sanghyun Park

摘要

This study presents the development and evaluation of a mobile local exhaust ventilation (LEV) unit designed to protect healthcare workers (HCWs) during aerosol-generating procedures (AGPs) in infectious disease scenarios. The newly developed horn-shaped hood was optimized for intake velocity uniformity and particle capture efficiency. Computational Fluid Dynamics (CFD) simulations and experimental analyses demonstrated a 22% reduction in particle concentration in the HCW’s breathing zone compared to conventional designs. The integration of supply airflow significantly enhanced the Air Curtain effect, effectively blocking particle dispersion and maintaining stable indoor airflow. The experimental setup included airflow visualization, intake velocity measurement, and Particle Image Velocimetry (PIV) to assess the hood’s performance under varying conditions, such as hood height, coughing angles, and supply airflow rates. Results showed that the improved hood minimized particle recirculation and provided a consistent airflow pattern, addressing limitations of conventional hoods. The LEV unit’s mobile design ensures adaptability in various medical environments, offering effective containment of infectious aerosols while maintaining patient comfort. This system represents a viable engineering solution to enhance infection control measures and safeguard HCWs during pandemics and emergencies, highlighting the importance of integrated supply-and-exhaust systems in healthcare settings.