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Supply filtered breathing air through approved anesthesia ventilator circuit virus filter.

Use non-permeable, yet readily available barrier (plastic bag) as air tight hood protecting entire user head.

Provide protection against not only splash, but also highly dangerous aerosolized virus generated during airway manipulations.

Use positive pressure gradient rather than material perfection to exclude contaminated room air.

No tight fit requirement.

Unlike a completely 3D printed mask, does NOT rely on printing perfection to create safety barrier.

Preserve cleanliness of 3D parts inside PAPR to facilitate re-use and extended life.

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