A notification system monitors changes in {HEAD ~ air flow} channeled between a positive air pressure generator and {TAIL ~ 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 a positive air pressure generator and { TAIL ~ 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 OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH