Size of multibed patient room and airborne infection risk

Masayuki Ogata, Masakazu Suzuki, Shin Ichi Tanabe, Satoshi Hori, Shoichi Morimoto, Hitomi Tsutsumi

Research output: Contribution to conferencePaperpeer-review

Abstract

The objective of this research is to investigate the relationship between the size of a multibed patient room and the risk of airborne infection. Computational fluid dynamics simulations were used to address a number of room sizes with two types of ventilation systems. Assuming that one patient was infected and that infectious agents were contained in exhaled air, the risk of airborne infection was evaluated by the respirable concentration of each patient and the concentration distribution. The results of the simulations show that the airborne infection risk reduced with an increase in the room area, and that the risk of airborne infection tended to increase when the distance between the source of infectious agents and the exhaust outlet was larger than 2.3 m under personal ventilation conditions. In ceiling cassette type conditions, an increase in the room area may increase the risk of airborne infection because the decline in ventilation efficiency and the increase in the ventilation rate decrease the risk of airborne infection.

Original languageEnglish
Pages52-57
Number of pages6
Publication statusPublished - 2014 Jan 1
Event13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014 - Hong Kong, Hong Kong
Duration: 2014 Jul 72014 Jul 12

Conference

Conference13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014
CountryHong Kong
CityHong Kong
Period14/7/714/7/12

Keywords

  • CFD
  • Infection control
  • Multibed patient room
  • Simulation

ASJC Scopus subject areas

  • Pollution
  • Building and Construction
  • Health, Toxicology and Mutagenesis
  • Computer Science Applications

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