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London, UK – A new study published in Aerosol Science & Technology has raised concerns about the potential for hospital ventilation and air purification systems to inadvertently increase the spread of airborne particles, potentially carrying viral infections. Researchers at University College London Hospitals (UCLH) have found that while these systems are intended to mitigate viral transmission, they can sometimes have the opposite effect.
The study focused on how built-in mechanical ventilation and portable air cleaners (PACs) influence the movement of aerosols, which are tiny particles similar to those exhaled by individuals infected with respiratory viruses like SARS-CoV-2 or influenza. The research team conducted experiments in a hospital outpatient clinic, meticulously tracking aerosol movement under various conditions.
Their findings revealed a complex picture. While ventilation and PACs did reduce particle spread in some scenarios, they also significantly increased it in others. Notably, the use of PACs was observed to elevate aerosol spread between neighboring rooms by as much as 29%. Furthermore, the hospital’s built-in ventilation system amplified particle migration by up to 5.5 times in certain configurations.
One of the most effective methods to limit aerosol spread, according to the study, was simply closing doors. Researchers found that closing doors significantly reduced particle movement, with a dual-door closure achieving a remarkable 97% reduction in spread.
The study underscores the critical importance of careful airflow management in hospital settings. The researchers emphasize that the implementation of ventilation and air purification systems must be meticulously planned to avoid inadvertently exacerbating airborne transmission risks. This highlights the need for a nuanced understanding of how these systems interact with the specific architecture and layout of hospital spaces.
The implications of this study are significant for infection control protocols in healthcare facilities. It suggests that a one-size-fits-all approach to ventilation and air purification may not be effective and that a thorough assessment of each facility’s unique characteristics is essential.
Disclaimer: This news article is based on information provided in the referenced study. The findings represent the results of a specific study and may not be universally applicable. Further research is necessary to fully understand the complexities of airborne particle transmission in hospital settings. This article is for informational purposes only and should not be considered medical advice. Consult with healthcare professionals for guidance on infection control and prevention.
