Patent ID: 8839791

Claim:
A respiratory assistance system, comprising: a flow generator; a nasal pillows mask including a piloted exhalation valve; and a fluid conduit fluidly coupling the flow generator to the nasal pillows mask, and comprising: a tri-lumen tube defining a gas delivery lumen, a valve pilot lumen and a pressure sensing lumen which are each fluidly coupled to the flow generator; a first bi-lumen tube defining a gas delivery lumen which is fluidly coupled to and extends between the gas delivery lumen of the tri-lumen tube and the nasal pillows mask, and a pressure sensing lumen which is fluidly coupled to and extends between the pressure sensing lumen of the tri-lumen tube and the nasal pillows mask; and a second bi-lumen tube defining a gas delivery lumen which is fluidly coupled to and extends between the gas delivery lumen of the tri-lumen tube and the nasal pillows mask, and a valve pilot lumen which is fluidly coupled to and extends between the valve pilot lumen of the tri-lumen tube and the nasal pillows mask.