I’m still pretty scornful. There’s an existing satisfactory and easy to manufacture design (Manley ventilator) that addresses issues of controlling tidal volum

I’m still pretty scornful. There’s an existing satisfactory and easy to manufacture design (Manley ventilator) that addresses issues of controlling tidal volume and operating on whatever supply and even allowing manual operation. DIY could make thousands in a cottage industry if desired. Here we are instead with people designing devices and then asking for doctors to give them a pat on the back.