Abstract: A respiratory system drug applicator for a patient is disclosed which may include a number of features to enhance the administration of the aerosolized drug to the patient. For instance, an adjustable flow regulator may be utilized which regulates the air flow during inhalation by the patient (during which the aerosolized drug is also administered to the patient's respiratory system), and thus affects the patient's breathing pattern. Moreover, a distensible drug reservoir which changes shape during inhalation and exhalation by the patient may be utilized. This may be used to provide biofeedback to the patient regarding the patient's breathing pattern.

Abstract: An inhalation therapy device has a first conduit joining a nebulizer to a patient breathing port, having a one way check valve. An expandable reservoir for receiving medication from the nebulizer joins the first conduit. A second conduit connected to the first conduit has a filter in a filter housing and a restricted orifice through which both inhalation from, and exhalation to, the atmosphere occurs.