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