Affiliation:
1. Department of Mechanical Engineering City University of Hong Kong Hong Kong Special Administrative Region China
2. Department of Anaesthesiology University of Hong Kong, Queen Mary Hospital Hong Kong Special Administrative Region China
Abstract
SummaryThe amount of aerosol generation associated with the use of positive pressure ventilation via a supraglottic airway device has not been quantified. We conducted a two‐group, two‐centre, prospective cohort study in which we recruited 21 low‐risk adult patients scheduled for elective surgery under general anaesthesia with second‐generation supraglottic airway devices. An optical particle sizer and an isokinetic sampling probe were used to record particle concentrations per second at different size distributions (0.3–10 μm) during use as well as baseline levels during two common activities (conversation and coughing). There was a median (IQR [range]) peak increase of 2.8 (1.5–4.5 [1–28.1]) and 4.1 (2.0–7.1 [1–18.2]) times background concentrations during SAD insertion and removal. Most of the particles generated during supraglottic airway insertion (85.0%) and removal (85.3%) were < 3 μm diameter. Median (IQR [range]) aerosol concentration generated by insertion (1.1 (0.6–5.1 [0.2–22.3]) particles.cm−3) and removal (2.1 (0.5–3.0 [0.1–18.9]) particles.cm−3) of SADs were significantly lower than those produced during continuous talking (44.5 (28.3–70.5 [2.0–134.5]) particles.cm−3) and coughing (141.0 (98.3–202.8 [4.0–296.5]) particles.cm−3) (p < 0.001). The aerosol levels produced were similar with the two devices. The proportion of easily inhaled and small particles (<1 μm) produced during insertion (57.5%) and removal (57.5%) was much lower than during talking (99.1%) and coughing (99.6%). 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.
Subject
Anesthesiology and Pain Medicine
Reference17 articles.
1. Elective surgery cancellations due to the COVID‐19 pandemic: global predictive modelling to inform surgical recovery plans;COVIDSurg Collaborative;British Journal of Surgery,2020
2. ChanA.Infographic for Principles of Airway Management in COVID‐19.https://www.aic.cuhk.edu.hk/covid19/(accessed 22/11/2022).
3. Consensus guidelines for managing the airway in patients with
COVID
‐19
4. Personal protective equipment during the coronavirus disease (COVID) 2019 pandemic – a narrative review
5. A quantitative evaluation of aerosol generation during supraglottic airway insertion and removal
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