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An improved CDC isolation room ventilation method for infection control.

Author(s) : XIE X. J., QIAN H., LI Y. G.

Summary

With possible high concentration of pathogen-loaded bio aerosols, hospitals require the ventilation not only to provide a comfortable environment, but also to remove efficiently the pathogen-loaded bio aerosols for minimizing cross infection. Different ventilation strategies may be required for different rooms. As to isolation room for controlling infectious diseases, our previous studies with gaseous pollutant and solid particles showed that existing CDC downward ventilation system could not produce a "laminar" flow to push the respiratory pollutants downward and remove them from the bottom exhaust due to human exhalation and human body plume. Gaseous pollutants and fine particles would follow the upward thermal plume and widely spread in the room, while large particles could not efficiently be removed from bottom exhaust but deposit on beds, floor and patient's skin. A ceiling level exhaust may be useful for pollutant removal. In this study, numerical simulations of air flow pattern and pollutant transport and dispersion were conducted in a six-bed isolation room, in which liquid droplets containing solid matters were used as respiratory droplets. Understanding of dispersion characteristics of respiratory droplets in ventilated isolation rooms would be helpful to improve the CDC ventilation system.

Details

  • Original title: An improved CDC isolation room ventilation method for infection control.
  • Record ID : 2009-0320
  • Languages: English
  • Source: Cryogenics and refrigeration. Proceedings of ICCR'2008.
  • Publication date: 2008/04/05

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