| abstract |
A respiratory gas delivery system ( 10 ) is disclosed. The respiratory gas delivery system ( 10 ) comprises a wearer interface ( 16 ) through which respiratory gas is supplied to a wearer's airway and a gas conditioning device ( 24 ) for conditioning the respiratory gas upstream of the interface ( 16 ) in a direction of gas flow to the wearer, the gas conditioning device ( 24 ) comprising a controller ( 78 ), wherein the interface ( 16 ) comprises a sensor for measuring an operating variable in use such that the controller ( 78 ) controls the operation of the conditioning device ( 24 ) based on said sensor measurement. |