qrk
You need to control the pressure and/or volume of air. If you don't, you cause more problems by rupturing the lungs. In theory, you could if you can control the above, but it will be much more involved than just hooking up the output of a shop vac to someone's mouth.
Joseph
Let's hook you up to a 12,000 cfm HV unit and see what happens. If you even knew what a ventilator is you wouldn't be asking this question.
billrussell42
no, easier to build them from scratch
Rick B
Dison is already building ventilators.