The controller detects {HEAD ~ transitions} between inspiration and {TAIL ~ expiration} via a flow signal to discriminate between the respiratory phases of the patient 
The controller detects { HEAD ~ transitions } between inspiration and { TAIL ~ expiration } via a flow signal to discriminate between the respiratory phases of the patient
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH