A notification system monitors changes in {HEAD ~ air flow} channeled between {TAIL ~ a positive air pressure generator} and a CPAP mask supplying positive airway pressure to a patient during treatment of sleep apnea 
channeled between
A notification system monitors changes in { HEAD ~ air flow } channeled between { TAIL ~ a positive air pressure generator } and a CPAP mask supplying positive airway pressure to a patient during treatment of sleep apnea
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH