Patent ID: 7165547

Claim:
A high frequency pressure oscillation device comprising: a patient circuit defining a closed path between a single source of breathing gas and an airway of a patient; a valve disposed in the patient circuit such that in an open position the path between such a source of breathing gas and an airway of a patient is substantially unobstructed, and, in a closed position, the path between such a source of breathing gas and an airway of a patient is at least partially obstructed; an actuating system associated with the valve that alternatively places the valve in the open position and the closed position at a predetermined oscillation rate independent of patient effort, wherein the valve is disposed in the patient circuit and configured such that rotating the valve in a first direction alternatively places the valve in the open position and the closed position, and wherein the actuating system comprises a rotating drive assembly operatively coupled to the valve to rotate the valve in the first direction; and a pulmonary measurement means associated with the patient circuit that measures a characteristic associated with a pulmonary function of a patient, wherein the device includes a secretion clearance mode and a spirometer mode.