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Iconographies supplémentaires de l'article : Factors involved in the aerosol transmission of infection and control of ventilation in healthcare premises

TLDR
Recommendations are made to improve the control of aerosol-transmitted infections in hospitals as well as in the design and construction of future isolation facilities.
Abstract
Summary The epidemics of severe acute respiratory syndrome (SARS) in 2003 highlighted both short- and long-range transmission routes, i.e. between infected patients and healthcare workers, and between distant locations. With other infections such as tuberculosis, measles and chickenpox, the concept of aerosol transmission is so well accepted that isolation of such patients is the norm. With current concerns about a possible approaching influenza pandemic, the control of transmission via infectious air has become more important. Therefore, the aim of this review is to describe the factors involved in: (1) the generation of an infectious aerosol, (2) the transmission of infectious droplets or droplet nuclei from this aerosol, and (3) the potential for inhalation of such droplets or droplet nuclei by a susceptible host. On this basis, recommendations are made to improve the control of aerosol-transmitted infections in hospitals as well as in the design and construction of future isolation facilities.

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Citations
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Journal ArticleDOI

A Review of the Research Literature on Evidence-Based Healthcare Design

TL;DR: This review found a growing body of rigorous studies to guide healthcare design, especially with respect to reducing the frequency of hospital-acquired infections and the state of knowledge of evidence-based healthcare design has grown rapidly in recent years.
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Transmission of COVID-19 virus by droplets and aerosols: A critical review on the unresolved dichotomy.

TL;DR: It is demonstrated that the nosocomial transmission by airborne SARS-CoV-2 viral-laden aerosols in healthcare facilities may be plausible and clearly defined, science-based administrative, clinical, and physical measures are of paramount importance to eradicate the COVID-19 pandemic from the world.
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Violent expiratory events: on coughing and sneezing

TL;DR: In this paper, the authors present the results of a combined experimental and theoretical investigation of the fluid dynamics of such violent expiratory events, which reveals that such flows are multiphase turbulent buoyant clouds with suspended droplets of various sizes.
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Recognition of aerosol transmission of infectious agents: a commentary

TL;DR: This review considers the commonly used term of ‘aerosol transmission’ in the context of some infectious agents that are well-recognized to be transmissible via the airborne route, and discusses other agents, like influenza virus, where the potential for airborne transmission is much more dependent on various host, viral and environmental factors, and where its potential for aerosol transmission may be underestimated.

The fluid mechanics of natural ventilation

TL;DR: In this paper, two forms of ventilation are discussed: mixing ventilation and displacement ventilation, where the interior is at an approximately uniform temperature and there is strong internal stratification, respectively, and the effects of wind on them are examined.
References
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Journal Article

Investigation into airborne transport characteristics of airflow due to coughing in a stagnant indoor environment

TL;DR: In this article, the airborne transport characteristics of airflow due to coughing are investigated in a stagnant indoor environment using transient computational fluid dynamics (CFD) analysis on the dispersion of coughed airflow.
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The role of airborne bacteria in the contamination of fine particle nebulizers and the development of nosocomial pneumonia

TL;DR: Data from these studies indicate that contamination of fine particle nebulizers can be produced by the airborne route; and the incidence of nosocomial respiratory infections is significantly related to airborne bacterial levels.
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Effect of a circulating nurse walking on airflow and bacteria-carrying particles in the operating room: An experimental and numerical study

TL;DR: Although the walking of the circulating nurse made no difference to the airflow above the operating table, the BCP concentration above nearby instrument tables increased as the circulating nurses passed, resulting in an increased risk of SSI.
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Universal decontamination of hospital surfaces in an occupied inpatient room with a continuous 405 nm light source.

TL;DR: Prolonged exposure to the HINS-light EDS causes a cumulative decontamination of the surfaces within a burns unit and the importance of exposure time and possible airborne effect over irradiance levels is emphasized.

Environmental Control Including Ventilation In Hospitals

Vipin Kaushal
TL;DR: The engineering, architectural or medical communities have put very little emphasis on designing facilities for maximum infection control, often those who built the facility did so on criteria that was more concerned with cost and aesthetics than reliability, serviceability, or asepsis.