Res(Uhu)Rge: A Low Cost and Fully Functional Ventilator Indicated for Application in COVID-19 Patients

. 2020 Nov 27;20(23):6774. doi: 10.3390/s20236774

$B F$	breathing frequency (breaths per minute)
$B F_{S e t p o i n t}$	desired breathing frequency (breaths per minute)
$E_{R a t e}$	expiration rate from I/E ratio: APVR mode (1)
$E x p_{T i m e}$	expiration time (s)
$E x p_{T i m e M a x}$	maximum expiration time (s)
$I n s p_{T i m e}$	inspiration time (s)
$I n s p_{T i m e M a x}$	maximum inspiration time (s)
$I_{R a t e}$	inspiration rate from I/E ratio, APVR mode (12)
$I / E r a t i o$	ratio between inspiration and expiration time
$T_{s}$	sample period (s)
$V o L_{i n s p}$	tidal volume or inspired volume in each inspiration (mL)
$V o L_{m i n}$	inspired volume per minute (L/min)