Oscillating positive expiratory pressure device
A respiratory treatment device comprising at least one chamber, a chamber inlet configured to receive air into the at least one chamber, at least one chamber outlet configured to permit air to exit the at least one chamber, and a flow path defined between the chamber inlet and the at least one chamber outlet. A restrictor member positioned in the flow path is moveable between a closed position, where a flow of air along the flow path is restricted, and an open position, where the flow of air along the flow path is less restricted. A vane in fluid communication with the flow path is operatively connected to the restrictor member and is configured to reciprocate between a first position and a second position in response to the flow of air along the flow path.
1. A respiratory treatment device comprising:
a housing enclosing a plurality of chambers;
a first opening in the housing configured to transmit air exhaled into the housing and air inhaled from the housing;
a second opening in the housing configured to permit air exhaled into the first opening to exit the housing;
a third opening in the housing configured to permit air outside the housing to enter the housing upon inhalation at the first opening;
an exhalation flow path defined between the first opening and the second opening, and an inhalation flow path defined between the third opening and the first opening;
a restrictor member positioned in the exhalation flow path and the inhalation flow path, such that the restrictor member is movable between a closed position, where a flow of air along the exhalation flow path or the inhalation flow path is restricted, and an open position, where the flow of exhaled air along the exhalation flow path or the inhalation flow path is less restricted than in the closed position;
a fourth opening in the housing configured to permit the flow of air along the exhalation flow path to exit the housing prior to the position of the restrictor member in the exhalation flow path;
a fifth opening in the housing configured to permit air outside the housing to enter the inhalation flow path upon inhalation at the first opening subsequent to the position of the restrictor member in the inhalation flow path; and,
a switch positioned relative to the fourth opening and the fifth opening such that one or both of the fourth opening and the fifth opening is configured to be closed by the switch.
2. The respiratory treatment device of claim 1 , further comprising a vane in fluid communication with the exhalation flow path and the inhalation flow path, the vane being operatively connected to the restrictor member and configured to repeatedly reciprocate between a first position and a second position in response to the flow of air along the exhalation flow path or the inhalation flow path.
3. The respiratory treatment device of claim 2 , wherein the restrictor member is positioned in a first chamber of the plurality of chambers, and the vane is positioned in a second chamber of the plurality of chambers.
4. The respiratory treatment device of claim 3 , wherein the first chamber and the second chamber are connected by an orifice.
5. The respiratory treatment device of claim 4 , wherein the vane is positioned adjacent the orifice, the vane being configured to move the restrictor member between the closed position and the open position in response to an increased pressure adjacent the vane.
6. The respiratory treatment device of claim 1 , wherein the exhalation flow path and the inhalation flow path form an overlapping portion.
7. The respiratory treatment device of claim 6 , wherein the flow of air along the exhalation flow path and the inhalation flow path along the overlapping portion is in the same direction.
8. The respiratory treatment device of claim 6 , wherein the restrictor member is positioned in the overlapping portion.
9. The respiratory treatment device of claim 1 , wherein the flow of air through an inlet to a first chamber is restricted when the restrictor member is in the closed position, while the flow of air through the inlet is less restricted than in the closed position when the restrictor member is in the open position.
10. The respiratory treatment device of claim 1 , wherein the second opening includes a one-way exhalation valve configured to permit air exhaled into the housing to exit the housing upon exhalation at the first opening.
11. The respiratory treatment device of claim 1 , wherein the third opening includes a one-way inhalation valve configured to permit air outside the housing to enter the housing upon inhalation at the first opening.
12. The respiratory treatment device of claim 1 , wherein the device is configured to provide oscillating pressure therapy upon both inhalation and exhalation when the switch is positioned relative to the fourth opening and the fifth opening such that both of the fourth opening and the fifth opening are closed by the switch.
13. The respiratory treatment device of claim 1 , wherein the device is configured to provide oscillating pressure therapy upon exhalation when the switch is positioned relative to the fourth opening such that the fourth opening is closed by the switch.
14. The respiratory treatment device of claim 1 , wherein the device is configured to provide oscillating pressure therapy upon inhalation when the switch is positioned relative to the fifth opening such that the fifth opening is closed by the switch.
15. The respiratory treatment device of claim 1 , further comprising a one-way valve positioned along the exhalation flow path between the first opening and the second opening, the one-way valve being configured to open in response to air exhaled into the first opening, and close in response to air inhaled through the first opening.
16. The respiratory treatment device of claim 1 , further comprising a one-way valve positioned along the inhalation flow path between the third opening and the first opening, the one-way valve being configured to open in response to air inhaled through the first opening, and close in response to air exhaled into the first opening.