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