Apparatus for {HEAD ~ the supply} of breathable gas cyclically at {TAIL ~ an inspiratory pressure} and a lower expiratory pressure substantially in synchronism with a patients respiration 
Apparatus for { HEAD ~ the supply } of breathable gas cyclically at { TAIL ~ an inspiratory pressure } and a lower expiratory pressure substantially in synchronism with a patients respiration
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH