Passive respiratory therapy device
View Patent ↗A respiratory therapy device including a housing and an interrupter valve assembly. The housing is sized for handling by a patient and defines a patient breathing passage extending from a patient end and through which a patient inhales and exhales air. The interrupter valve assembly is carried by the housing and includes a control port, a valve body, and a drive mechanism. Expiratory airflow is released from the patient breathing passage through the control port. The valve body is sized to at least partially obstruct fluid flow through the control port. The drive mechanism moves the valve body relative to the control port in response to the expiratory airflow such that the valve body repeatedly transitions between a position of maximum obstruction and a position of minimum obstruction relative to the control port to create an oscillatory positive expiratory pressure effect.
1. An oscillating positive expiratory pressure therapy device for use by a patient, the device comprising:
a housing sized for handling by a patient and defining a patient breathing passage extending from a patient end and through which a patient to be treated inhales and exhales air; and
an interrupter valve assembly carried by the housing and including:
a control port through which expiratory airflow is released from the patient breathing passage,
a valve body sized to at least partially obstruct fluid flow through the control port,
a drive mechanism operating in response to expiratory airflow, the drive mechanism configured to rotate the valve body relative to the control port,
wherein the interrupter valve assembly is configured such that with rotation, the valve body repeatedly transitions between a position of maximum obstruction and a position of minimum obstruction relative to the control port.
2. The device of claim 1 , wherein the interrupter valve assembly includes two control ports through which expiratory airflow is released from the patient breathing passage.
3. The device of claim 1 , wherein the valve body includes two valve plates segments arranged to selectively obstruct the control port.
4. The device of claim 1 , wherein the interrupter valve assembly further includes a drive shaft connecting the valve body and the drive mechanism such that rotation of the drive shaft causes the valve body to selectively obstruct the control port.
5. The device of claim 4 , wherein the drive mechanism is adapted to rotate the shaft.
6. The device of claim 5 , wherein drive mechanism includes first and second lobe bodies.
7. The device of claim 6 , wherein the housing further includes a first chamber separated from the patient breathing passage by a wall in which the control port is formed, and further wherein the valve body is maintained within the first chamber.
8. The device of claim 7 , wherein the housing further includes a second chamber adjacent the first chamber, and wherein the lobe bodies are maintained within the second chamber.
9. The device of claim 8 , wherein the first and second chambers are fluidly connected by an aperture such that fluid flow from the first chamber to the second chamber acts upon the lobe bodies to cause rotation thereof.
10. The device of claim 9 , wherein the second chamber forms an outlet opening fluidly connected to an exhaust outlet.
11. The device of claim 9 , wherein the housing further forms a relief port arrangement in the first chamber apart from the control port, the device further including a valve structure controlling fluid flow through the relief port arrangement such that when a fluid pressure within the first chamber exceeds a predetermined level, the valve structure fluidly opens the relief port arrangement.
12. The device of claim 11 , wherein the housing further forms an exhaust chamber defining the exhaust outlet and fluidly connected to the first chamber via the relief port arrangement.
13. The device of claim 12 , wherein the exhaust chamber is fluidly connected to the second chamber via an outlet opening.
14. An oscillating positive expiratory pressure therapy device for use by a patient, the device comprising:
a housing sized for handling by a patient and defining a patient breathing passage extending from a patient end and through which a patient to be treated inhales and exhales air; and
an interrupter valve assembly carried by the housing and including:
a control port though which expiratory airflow is released from the patient breathing passage,
a valve body sized to at least partially obstruct fluid flow through the control port,
a member having a first end attached to the valve body and a second end opposite the first end, the member being assembled to control a position of the valve body relative to the control port;
wherein the interrupter valve assembly is configured to operate in response to expiratory airflow from the patient to selectively move the valve body relative to the control port in creating an oscillatory positive expiratory pressure effect, a distance between the second end of the member and the control port remaining fixed during operation of the interrupter valve assembly.
15. The device of claim 14 , wherein the member is rotatably maintained within the housing, and further wherein rotation of the member causes the valve body to selectively obstruct the control port.
16. The device of claim 15 , wherein the interrupter valve assembly further includes a drive mechanism for rotating the member.
17. The device of claim 16 , wherein the drive mechanism includes first and second lobe bodies.
18. The device of claim 17 , wherein the housing includes a first chamber separated from the patient breathing passage by a wall in which the control port is formed, and further wherein the valve body is disposed within the first chamber.
19. The device of claim 18 , wherein the housing further includes a second chamber adjacent the first chamber, and further wherein the lobe bodies are maintained within the second chamber.
20. The device of claim 19 , wherein the first and second chambers are fluidly connected by an aperture such that fluid flow from the first chamber to the second chamber acts upon the lobe bodies to cause rotation thereof.
21. The device of claim 20 , wherein the second chamber forms an outlet opening fluidly connected to an exhaust outlet.
22. The device of claim 14 , wherein the second end of the member is fixed relative to the housing to define a cantilever beam.
23. The device of claim 22 , wherein the valve assembly is configured such that a distance of travel of the valve body relative to the control port is solely a function of a force constant of the beam and a pressure of expiratory airflow at the control port.
24. The device of claim 14 , wherein the valve body defines a contact face positioned to interact with the control port, the contact face being flat.
25. An oscillating positive expiratory pressure therapy device for use by a patient, the device comprising:
a housing sized for handling by a patient and defining a patient breathing passage extending from a patient end and through which a patient to be treated inhales and exhales air; and
an interrupter valve assembly carried by the housing and including:
a control port through which expiratory airflow is released from the patient breathing passage,
a valve body sized to at least partially obstruct fluid flow through the control port,
a drive mechanism including a component configured to rotate in response to expiratory airflow, wherein the drive mechanism is operable to move the valve body relative to the control port,
wherein the interrupter valve assembly is configured such that with rotation of the drive mechanism component, the valve body repeatedly transitions between a position of maximum obstruction and a position of minimum obstruction relative to the control port.
26. A method of providing respiratory therapy to a patient comprising:
providing a respiratory therapy device including:
a housing sized for handling by a patient and defining a patient breathing passage extending from a patient end and through which a patient to be treated inhales and exhales air,
an interrupter valve assembly carried by the housing and including:
a control port through which expiratory airflow is released from the patient breathing passage,
a valve body sized to at least partially obstruct fluid flow through the control port,
a drive mechanism for rotating the valve body relative to the control port in response to expiratory airflow,
placing the patient end into a mouth of the patient;
breathing by the patient through the patient end, including inhaling and exhaling,
wherein expiratory airflow from the patient into the device to acts upon the drive mechanism;
rotating the valve body relative to the control port by the drive mechanism in response to the expiratory airflow; and
creating an oscillatory positive expiratory pressure effect on the patient with rotation of the valve body.
27. A method of providing respiratory therapy to a patient comprising:
providing a respiratory therapy device including:
a housing sized for handling by a patient and defining a patient breathing passage extending from a patient end and through which a patient to be treated inhales and exhales air,
an interrupter valve assembly carried by the housing and including:
a control port through which expiratory airflow is released from the patient breathing passage,
a valve body sized to at least partially obstruct fluid flow through the control port,
a drive mechanism for moving the valve body relative to the control port in response to expiratory airflow,
placing the patient end into a mouth of the patient;
breathing by the patient through the patient end, including inhaling and exhaling;
actuating the drive mechanism to create a rotational movement in response to expiratory airflow from the patient;
moving the valve body relative to the control port with operation of the drive mechanism; and
creating an oscillatory positive expiratory pressure effect on the patient with movement of the valve body.