Patent ID: 8371300

Claim:
A system, comprising: a respiratory delivery arrangement adapted to cover at least one respiratory orifice of a patient, the respiratory delivery arrangement comprising a leak port; a first conduit having a first end and a second end, the second end connected to the respiratory delivery arrangement, a positive pressure being provided to the respiratory orifice via the first conduit; a second conduit having a third end and a fourth end, the third end being separated from the first end, the fourth end connected to the respiratory delivery arrangement; and a valve located in the first conduit, the valve having a first position and a second position, wherein when the valve is in the first position, (a) a positive pressure flows through the first and second conduits and (b) exhaled gas from the respiratory orifice exits through the leak port, wherein, when the valve is in the second position, (a) a positive pressure flows through only the second conduit, (b) a first portion of exhaled gas from the respiratory orifice exits the leak port and (c) a second portion of exhaled gas exits through the valve.