There are really a lot of those projects. I have been following this one: https://www.oxygen.protofy.xyz/ https://www.oxygen.protofy.xyz/ It's open source and

There are really a lot of those projects. I have been following this one: https://www.oxygen.protofy.xyz/ https://www.oxygen.protofy.xyz/ It's open source and there are two versions: industrial production and 3d printing. I also find the mechanical way it adapts to different patients interesting: the different breathing patterns are codified by different levers in the mechanism that push the AMBU. So, the programming is done changing a piece in the device. There is this cool visualization too: https://protofyteam.github.io/oxygen-visualization/ https://protofyteam.github.io/oxygen-visualization/