Patent ID: 7779841

Claim:
A device for providing respiratory therapy to a patient during at least a portion of a patient breathing cycle including an inspiratory phase and an expiratory phase, the device comprising: a housing including a patient inlet, an exhaust outlet, a first chamber fluidly disposed between the patient inlet and the exhaust outlet, and a first pressurized fluid supply inlet; and an interrupter valve assembly associated with the housing and including a control port fluidly connecting the patient inlet and the first chamber, and a valve body adapted to selectively obstruct fluid flow through the control port; wherein the device is adapted to: operate in a first, passive mode in which fluid flow to the first pressurized fluid supply inlet does not occur and the interrupter valve assembly interacts with exhaled air to create an oscillatory positive expiratory pressure effect during the expiratory phase via the body selectively obstructing fluid flow from the patient through the control port, and operate in a second, active mode in which fluid flow to the pressurized fluid supply inlet occurs and the interrupter valve assembly interacts with the fluid flow to create a continuous high frequency oscillation effect via the valve body selectively obstructing fluid flow from the first pressurized fluid supply inlet through the control port.