You could be fitted having a mask to have air within the ventilator into your lungs. Otherwise you might require a breathing tube if your respiratory dilemma is more major. But they will not breathe if the ventilator is turned off, given that they have no brain action (Mind death). https://techtexsport.cz/optimalizace-vetrani-hal-s-hvls-ventilatory-ucinne-reseni-pro-prumyslove-prostory