Aerosol generation with the use of positive pressure ventilation via supraglottic airway devices: an observational study
Authors' conclusion
These results suggest that the use of supraglottic airway devices in low-risk patients, even with positive pressure ventilation, generates fewer aerosols than speaking and coughing in awake patients.
Study context
- Population
- Low-risk adults scheduled for elective surgery under GA with second-generation supraglottic airway devices
- Participants
- 21 adults
- Exposure
- Aerosol generation during SAD insertion and removal with positive pressure ventilation vs conversation and coughing
- Outcome
- Aerosol particle concentrations (0.3-10 μm) during SAD use vs conversation and coughing
Methodological detailstwo-group, two-centre, observational
- Two-group
- Two-centre
- Observational
Main finding
As reported in the abstract
Aerosol concentration
P < 0.001
Observational data: associations, not effects.
Further findings
Proportion of small particles (<1 μm)
| Outcome | Insertion | Removal | Talking | Coughing |
|---|---|---|---|---|
| Peak increase vs background concentrations | median 2.8 (IQR [range] 1.5-4.5 [1-28.1]) times background | median 4.1 (IQR [range] 2.0-7.1 [1-18.2]) times background | — not stated in the abstract | — not stated in the abstract |
| Proportion of particles < 3 μm diameter | 85.0% | 85.3% | — not stated in the abstract | — not stated in the abstract |
— not stated in the abstract
Aerosol levels by device
- Aerosol levels similar with the two devices
Original publication
Aerosol generation with the use of positive pressure ventilation via supraglottic airway devices: an observational study. Anaesthesia. Published 28 June 2023. doi:10.
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