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Fugitive Aerosol Therapy Emissions during Mechanical Ventilation: In Vitro Assessment of the Effect of Tidal Volume and Use of Protective Filters
Aerosol and Air Quality Research ; 20(12), 2020.
Article in English | ProQuest Central | ID: covidwho-1771374
ABSTRACT

Background:

During mechanical ventilation of a patient requiring ventilatory support, bystanders could potentially be exposed to aerosolised drug.

Methods:

Fugitive drug aerosol emissions during simulated adult mechanical ventilation was assessed on a dual limb circuit. Tidal volume was set at 270 mL and 820 mL. The use of a protective filter on the exhalation port of the mechanical ventilator was assessed.

Results:

Higher fugitive aerosol mass concentrations in the local environment were associated with larger tidal volume (0.077 (0.073, 0.091) mg m–3 at Vt = 820 mL vs. 0.062 (0.056, 0.065) mg m–3 at Vt = 270 mL) when no protective filter was used. The range of mass median aerodynamic diameters recorded was from 0.93 to 2.96 µm. When a filter was placed on the exhalation port of the mechanical ventilator, no fugitive emissions were recorded.

Conclusion:

This study confirms that an appropriate filtration protocol mitigates the risk of fugitive emissions being released when patients undergo aerosol therapy during mechanical ventilation. A larger tidal volume resulted in higher fugitive aerosol mass.
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Full text: Available Collection: Databases of international organizations Database: ProQuest Central Type of study: Experimental Studies Language: English Journal: Aerosol and Air Quality Research Year: 2020 Document Type: Article

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Full text: Available Collection: Databases of international organizations Database: ProQuest Central Type of study: Experimental Studies Language: English Journal: Aerosol and Air Quality Research Year: 2020 Document Type: Article