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