ArticleJournal of thoracic disease2020
Development of positive/negative pressure booth generating airflow for protection of medical staff from contagious respiratory pathogens.
Article in Journal of thoracic disease, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
2 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundThe pandemic of COVID-19 caused confusion in medical settings because of increased patient load, and caused many infections among medical staff which occurred through exposure to bio-particles discharged from patients. The risk of exposure became maximum at the examination of patients, particularly in the collection of respiratory specimens. Effective interventions to reduce the risk are needed.
methodsA one-person booth consisting of curtain walls, frames, and fan-HEPA filter-unit (FFU) was designed. Using the airstream from/to FFU, it has dual functions as a positive/negative pressure machine to prevent pathogens in patient's cough to reach the medical staff inside/outside the booth, respectively. The curtain walls and positioning of the patient and staff were aerodynamically optimized for the best control of the airstream.
resultsThe positive pressure booth is to isolate a staff inside to safely deal with a surge in the number of patients in situations like influenza pandemics. The negative pressure booth is to isolate a patient inside to protect a staff outside from dangerous contagious respiratory infectious diseases including COVID-19. A calculated airflow of the positive pressure machine efficiently pushed back bio-particles discharged from a person outside the booth. The bio-particles of a cough from a person inside the negative pressure booth was sucked into the FFU for filtration immediately after the discharge. The booth needed a short front curtain of a stair-cut shape, and a patient and a staff facing each other needed to be positioned at an angle 45° to the airstream for optimization of the airflow.
conclusionsThe booth named Barriflow
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