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Efficacy of a surgical mask during high-flow nasal oxygen therapy in preventing aerosol dispersion: a randomized controlled study.
- Source :
-
Journal of Anesthesia . Oct2023, Vol. 37 Issue 5, p787-793. 7p. - Publication Year :
- 2023
-
Abstract
- Purpose: It is not clear whether or not high-flow nasal oxygenation used in patients with severe respiratory tract infection, or coughing, increases the risk of infection to the healthcare personnel, and whether or not applying a surgical mask to the patient's face or treating the patient in a negative-pressure room can reduce the risk. Methods: In a randomized crossover design, we compared in 50 participants receiving high-flow nasal oxygenation, the aerosol counts measured at approximately 20 cm above the participant's mouth in 32 different circumstances (with or without coughing, with or without wearing a surgical mask, at four different flow rates of oxygenation, in a positive- or negative-pressure operating room). Results: In a positive-pressure room, a surgical mask significantly decreased the aerosol counts during coughing (P = 0.0005), or during no coughing (P = 0.009), under high-flow nasal oxygenation (at 60 l.min−1). In the negative-pressure room, the aerosol count was significantly lower than in the positive-pressure room, for all the circumstances (all P < 0.001), and a surgical mask significantly decreased the aerosol counts during coughing (P = 0.047) but not during no coughing (P = 0.60). Conclusion: In conclusion, treating a patient in a negative-pressure room, or applying a surgical mask, during high-flow nasal oxygenation (with the flow rate of 60 l.min−1) would inhibit, but would not completely prevent, dispersion of aerosols by coughing. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09138668
- Volume :
- 37
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of Anesthesia
- Publication Type :
- Academic Journal
- Accession number :
- 172442818
- Full Text :
- https://doi.org/10.1007/s00540-023-03237-w