As medical students we have many friends and colleagues working as first responders and front line workers on a daily basis. We saw many people struggling with masks and feeling insecure despite a face shield and two masks (one surgical the other N95). This inspired us to provide another layer of protection that would increase the safety of health care workers. A PAPR machine provides a constant flow of filtered air across the wearers face in addition to a physical barrier that protects against larger particles and bodily fluids.
First Hygieia PAPR prototype
Hygieia PAPR Helmet second prototype with 3D printed headpiece
We set to work to provide a PAPR device that could be made with inexpensive, readily available supplies and a 3D printer.
The power box places the filter on the "dirty" side and pushes air across the filter. It is then funneled through the hose and into the channels of the head piece. The air is blown directly over the wearers face allowing for constant flow and downward movement that then disperses out through the small gaps around the neck.
The Head Piece
Hygieia helmet air channel ports