The invention relates to a breathing assistance device for a patient, the device including: a source of respiratory pressurised gas; a gas transmission duct comprising a distal end coupled to said source and a proximal end coupled to the patient; a gas regulating valve interposed in the gas transmis
The invention relates to a breathing assistance device for a patient, the device including: a source of respiratory pressurised gas; a gas transmission duct comprising a distal end coupled to said source and a proximal end coupled to the patient; a gas regulating valve interposed in the gas transmission duct at a proximal location, comprising a leakage orifice and an obstruction means capable of varying the opening of the leakage orifice upon signal of controlling means and allowing a bidirectional gas flow through the leakage orifice in both expiration and inspiration phases.
대표청구항▼
1. A gas regulating valve for use with a breathing assistance device, adapted to be interposed in a gas transmission duct of the breathing assistance device at a location proximal to a patient, and comprising: a casing having a proximal portion and a distal portion that are coaxially coupled togethe
1. A gas regulating valve for use with a breathing assistance device, adapted to be interposed in a gas transmission duct of the breathing assistance device at a location proximal to a patient, and comprising: a casing having a proximal portion and a distal portion that are coaxially coupled together and comprise a passage therethrough to allow a supply of pressurized gas to circulate from a gas source to a patient in use;a leakage orifice to atmosphere formed in the proximal portion;an obstruction element including a movable element coupled to an obstructing piece capable of varying the opening of the leakage orifice; anda controller to control the movement of the obstruction element,wherein, the movable element surrounds the passage and is constructed to be sealingly separated from the supply of pressurised gas in the passage during use. 2. The valve according to claim 1, wherein the obstructing piece is an elastic membrane. 3. The valve according to claim 2 wherein the elastic membrane is made from rubber or silicone. 4. The valve according to claim 2, wherein the elastic membrane seals the movable element from the passage. 5. The valve according to claim 1 wherein the obstruction element is an electromagnetic obstruction element. 6. The valve according to claim 5, wherein the obstruction element further includes a magnetic element and the movable element is a coil and the coil surrounds the magnetic element. 7. The valve according to claim 6, wherein the obstruction element comprises a metallic armature that is fixed coaxially within the distal portion. 8. The valve according to claim 7 wherein the armature comprises an inner cylindrical portion and an outer cylindrical portion coupled together by an annular portion, the inner cylindrical portion having a diameter smaller than the outer cylindrical portion. 9. The valve according to claim 8, wherein the movable element is located within the outer cylindrical portion of the armature and translatable therein. 10. The valve according to claim 8, wherein a magnetic element is fixed to the inner cylindrical portion of the armature and is configured to control the movement of the moveable element. 11. The valve according to claim 8, wherein the inner cylindrical portion of the armature formed part of the passage for the supply of the pressurized gas. 12. The valve according to claim 8 wherein the proximal end of the outer cylindrical portion includes an annular ridge adapted to couple to the obstruction piece. 13. The valve according to claim 2, wherein the obstructing piece includes a pusher element adapted to deform the membrane to vary the opening of the leakage orifice. 14. The valve according to claim 1 further comprising at least one sensor for sensing flow and/or pressure in the gas passage, the sensor being associated with the controller. 15. The valve according to claim 14, wherein the distal portion includes an external chamber adapted to receive the at least one sensor. 16. The valve according to claim 15, further comprising a processing module configured to connect the sensor to the controller. 17. The valve according to claim 16, wherein the processing module is removably connected to the casing. 18. The valve according to claim 17, wherein the processing module includes a clip for removably coupling the processing module to the casing. 19. The valve according to claim 1 further comprising a breathing assistance device for a patient breathing is successive cycles, each cycle being defined by at least an inspiration phase and at least an expiration phase, said breathing assistance device comprising: a gas source of respiratory pressurized gas;a patient interface device;a gas transmission duct comprising a distal end coupled to said gas source and a proximal end adapted to couple to the patient interface device;a controller to control the operation of the device;wherein the gas regulating valve is interposed in the gas transmission duct near the proximal end of the gas transmission duct. 20. A gas regulating valve for use with a breathing assistance device, adapted to be interposed in a gas transmission duct of the breathing assistance device at a location proximal to a patient, and comprising: a casing including a gas flow duct and a housing;a leakage orifice to atmosphere formed in the housing;an obstruction element within the housing;a protection element within the housing between the leakage orifice and the obstruction element andthe obstruction element being adapted to move in response to control by a controller,wherein the gas flow duct includes a proximal end adapted to couple to the transmission duct in the direction of a patient and a distal end adapted to couple to the transmission duct in the direction of a gas source, the gas flow duct configured to receive a flow of breathable gas between the gas source and the patient;wherein a first side of the housing is in communication with the gas flow duct; andwherein, the obstruction element includes a movable element, the movable element acting on the protection element to vary the opening of the leakage orifice in response to a signal from the controller, the protection element isolating the obstruction element from the gas flow duct. 21. The valve according to claim 20, wherein the protection element is a membrane. 22. The valve according to claim 21, wherein the membrane is made from rubber or silicone. 23. The valve according to claim 22, wherein the housing is mounted transversally relative to the gas transmission duct. 24. The valve according to claim 21, wherein the obstruction element is an electromagnetic obstruction element. 25. The valve according to claim 24, wherein obstruction element further comprises a coil that surrounds the movable element and the movable element includes a magnetic element. 26. The valve according to claim 25, wherein the obstruction element comprises a metallic armature that is fixed within the housing. 27. The valve according to claim 26 wherein the armature comprises a top disc having a top circular opening; a bottom disc having a larger bottom circular opening, the top disc and bottom disc being coaxially coupled together by a peripheral coaxial cylindrical portion having the same diameter as the bottom circular opening; an inner cylindrical passage extending into the bottom circular opening; and a toric space between the inner cylindrical passage and peripheral coaxial cylindrical portion. 28. The valve according to claim 27, wherein the movable element is located within toric space of the armature and translatable therein. 29. The valve according to claim 27, wherein the coil is fixed in a position surrounding the armature to control the movement of the magnetic element. 30. The valve according to claim 27, wherein a peripheral edge of the protection element is coupled to the armature. 31. The valve according to claim 20, wherein the obstruction element further comprises a return means to ensure the leakage orifice is opened in the absence of the signal from the controller. 32. The valve according to claim 31, wherein the return means is a compression spring. 33. The valve according to claim 20 further comprising at least one sensor for sensing flow and/or pressure in the gas passage, the sensor being located in the housing and associated with the controller. 34. The valve according to claim 33, further comprising a processing module configured to connect the sensor to the controller. 35. The valve according to claim 20, further comprising a housing cover coupled to a second side of the housing. 36. The valve according to claim 20 further comprising a breathing assistance device for a patient breathing is successive cycles, each cycle being defined by at least an inspiration phase and at least an expiration phase, said breathing assistance device comprising: a gas source of respiratory pressurized gas;a patient interface device;a gas transmission duct comprising a distal end coupled to said gas source and a proximal end adapted to couple to the patient interface device;a controller to control the operation of the device;and wherein the gas regulating valve is interposed in the gas transmission duct near the proximal end of the gas transmission duct.
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이 특허에 인용된 특허 (31)
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