Calculation of air change rates and post-aerosol pause times for a COVID-19 airway management enclosure

Milne, Andrew D.; d’Entremont, Matthew I.; Law, J. Adam

doi:10.1007/s12630-020-01748-8

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Technological Principles and Viability1

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2020

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“…After the addition of the vacuum regulator, collection canister, and standard suction tubing, the airflow drops to 47.6 Lmin-1 [12]. Within other COVID-19 airway management enclosures, air exchange rates of 35-37 Lmin-1 have been calculated, while the high-volume extraction suction was calculated at 118 Lmin-1, with the decreased air exchange rate compared to previously published data likely due to the addition of the viral filter [13]. This corresponds to an air change per hour of 10.6 when using the standard filtered suction and 34.8 with the high volume extraction suction.…”

Section: Technological Principles and Viabilitymentioning

confidence: 99%

Use of Disposable Clear Plastic Elastic Band-Rimmed Bag to Limit Infectious Aerosol during Airway Instrumentation

Wong

Abramowicz

2020

Cureus

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The coronavirus disease 2019 (COVID-19) pandemic has highlighted the need for appropriate protective measures for health care providers, particularly for those involved in aerosol-generating procedures. We report the use of the banded bag for extubation to contain infectious aerosols. The banded bag is a clear and disposable shower-cap style image intensifier cover which is commonly used as a sterile cover for mobile Xray systems. With the addition of a filtered suction, safe air exchange rates can be obtained. We anticipate that the banded bag, which is economical, convenient, and highly practical, can be used as a safetyenhancing device for COVID-19 extubations.

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Section: Technological Principles and Viabilitymentioning

confidence: 99%