MIT E-Vent: A Low Cost Emergency Ventilator Controller

Volume Control Mode Definitions

The following waveform diagram is a visual explanation of the key cycle parameters used in e-vent.ino.

  |                                                                    
  |     |<- Inspiration ->|<- Expiration ->|                           
P |                                                                    
r |     |                 |                |                           
e |             PIP -> /                                  /            
s |     |             /|                   |             /|            
s |                  / |__  <- Plateau                  / |__          
u |     |           /     \                |           /     \         
r |                /       \                          /       \        
e |     |         /         \              |         /         \       
  |              /           \                      /           \      
  |     |       /             \            |       /             \     
  |            /               \                  /               \    
  |     |     /                 \          |     /                     
  |          /                   \              /                      
  |     |   /                     \        |   /                       
  |        /                       \          /                        
  |       /                         \        /                         
  | _____/                  PEEP ->  \______/                          
  |___________________________________________________________________ 
         |             |  |          |      |                          
         |<- tIn ----->|  |          |      |                   Time   
         |<- tHoldIn ---->|          |      |                          
         |<- tEx ------------------->|      |                          
         |<- tPeriod ---------------------->|                          
         |                                                             
                                                                       
     tCycleTimer