The system further provides for detecting changes in {HEAD ~ air pressure} in {TAIL ~ the air flow} supplied to a mask adapted to supply positive airway pressure to a patient undergoing treatment for a sleep disorder 
The system further provides for detecting changes in { HEAD ~ air pressure } in { TAIL ~ the air flow } supplied to a mask adapted to supply positive airway pressure to a patient undergoing treatment for a sleep disorder
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH