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. 2020 May 1;12(5):e7914.
doi: 10.7759/cureus.7914.

Personal Protective Equipment N95 Facemask Shortage Quick Fix: The Modified Airway From VEntilatoR Circuit (MAVerIC)

Free PMC article

Personal Protective Equipment N95 Facemask Shortage Quick Fix: The Modified Airway From VEntilatoR Circuit (MAVerIC)

David Convissar et al. Cureus. .
Free PMC article


We are in a crisis where healthcare providers on the frontlines are running out of the appropriate personal protective equipment including N95 masks and power air-purifying respirators. Here, we propose a makeshift filter mask that we call the Modified Airway from VEntilatoR Circuit (MAVerIC) that can be assembled within seconds using widely available supplies routinely utilized by anesthesia providers in the operating room to provide practitioners on the frontlines with the high standard of protection of a N95 mask during the coronavirus disease 2019 (COVID-19) pandemic, and can be easily quantitatively "fit tested" to ensure no significant leak to optimize safety and efficacy.

Keywords: coronavirus; covid-19; facemask; facemask shortage; healthcare worker safety; n-95 mask; n95 mask; patient safety; personal protective equipment; ppe shortage.

Conflict of interest statement

The authors have declared that no competing interests exist.


Figure 1
Figure 1. The Modified Airway from VEntilatoR Circuit (MAVerIC)
The figure illustrates the use of MAVerIC, a makeshift facemask assembled from components readily found in an operating room that is equivalent to N95 mask without (top panels) and with eye protection (bottom panels).
Figure 2
Figure 2. Standard anesthesia ventilator circuit that includes a HEPA filter (blue arrows), elbow (black arrow), and facemask (yellow arrow)
HEPA, high-efficiency particulate air.
Figure 3
Figure 3. Operating room head strap
Figure 4
Figure 4. Step-by-step pictorial instructions to assembling the Modified Airway from VEntilatoR Circuit (MAVerIC)

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