A patient ventilator secretion management system is disclosed. The system has a valve (26) with an input in pneumatic communication with a therapeutic breathing gas source (18). The valve (26) has variable positions, each of which corresponds to a specific flow rate of gas being output therefrom. A patient ventilation interface (12) is in pneumatic communication with the valve over a gas delivery circuit. A controller (30) in communication with the valve (26) regulates the position thereof. The controller (30) sequentially switches the valve from one of the variable positions to another to output a first range of fluctuating flow rates of gas for delivery to the patient ventilation interface during at least a selected one of patient expiratory and inspiratory phases.
