professionals, would something like this work?
flow chart in order of components
air source... small home air compressor
breathing control... normally closed air solenoid, and adjustable timer to control rate of valve opening
pressure regulator... LP style regulator to drop supply air pressure to usable air pressure
filter media...P95 filter material to filter out any oil to prevent mechanical pneumonia
clear plastic tubing, connect to nasal pharangeal airway for non ER intubation