초록 ▼

The invention relates to a breathing assistance device for a patient (P), the device including: —a source of respiratory pressurized gas (S), a gas transmission duct (31) comprising a distal end (31d) coupled to said source and a proximal end (31p) coupled to the patient, —a gas regulating valve (32

The invention relates to a breathing assistance device for a patient (P), the device including: —a source of respiratory pressurized gas (S), a gas transmission duct (31) comprising a distal end (31d) coupled to said source and a proximal end (31p) coupled to the patient, —a gas regulating valve (32, 50) interposed in the gas transmission duct at a proximal location, comprising a leakage orifice (531) and an obstruction means (54) capable of varying the opening of the leakage orifice upon signal of controlling means (35) and allowing a bidirectional gas flow through the leakage orifice in both expiration and inspiration phases.

대표청구항 ▼

1. A breathing assistance device for a patient breathing in successive cycles, each cycle being defined by at least an inspiration phase and at least an expiration phase, said breathing assistance device including: a source of respiratory pressurized gas,a gas transmission duct comprising a distal e

1. A breathing assistance device for a patient breathing in successive cycles, each cycle being defined by at least an inspiration phase and at least an expiration phase, said breathing assistance device including: a source of respiratory pressurized gas,a gas transmission duct comprising a distal end coupled to said source and a proximal end coupled to said patient,a gas regulating valve comprising at least a leakage orifice between the inside and outside of said duct, and an obstruction means capable of varying the opening of said leakage orifice upon signal of a controlling means, wherein the gas regulating valve is interposed in said duct at a proximal location, and that the obstruction means is capable of allowing a bidirectional gas flow through said leakage orifice in both expiration and inspiration phases, wherein the breathing assistance device further comprises a return means comprising a magnetic equator, wherein the return means maintains the leakage orifice in an open position in the absence of a signal from the control means. 2. A breathing assistance device according to claim 1, wherein the obstruction means is electrically controlled. 3. A breathing assistance device according to claim 2, wherein the obstruction means is an electromagnetic obstruction means. 4. A breathing assistance device according to claim 1, wherein the electromagnetic obstruction means further comprises a metallic sheath wherein a coil is fixed, said coil being controllable by the controlling means and surrounding a movable magnetic element, the metallic sheath and the movable magnetic element defining the magnetic equator. 5. A breathing assistance device according to claim 4, wherein the magnetic element further comprises a toric magnet, a first polar piece and a second polar piece, said first and second polar pieces being coaxially fixed on either side of the toric magnet and being of different polarities, and said second polar piece comprising an obstruction piece being capable of obstructing the leakage orifice. 6. A breathing assistance device according to claim 5, wherein the magnetic element is translatable along an axis of revolution of the toric magnet. 7. A breathing assistance device according to claim 6, wherein the electromagnetic obstruction means includes two coaxial coils controllable by the controlling means, the first coil substantially surrounding the toric magnet and the first polar piece, and the second coil substantially surrounding the toric magnet and the second polar piece. 8. A breathing assistance device according to claim 7, wherein the electromagnetic obstruction means is mounted coaxially relative to the gas transmission duct. 9. A breathing assistance device according to claim 1, wherein the returns means is a compression spring. 10. A breathing assistance device according to claim 7, wherein the electromagnetic obstruction means includes an armature surrounded by a coil, said coil being controllable by the controlling means, and said armature comprising an inner toric space wherein a magnetic element is translatable. 11. A breathing assistance device according to claim 7, wherein the magnetic element is capable of obstructing the leakage orifice. 12. A breathing assistance device according to claim 10, wherein the magnetic element is constrained by a compression spring. 13. A breathing assistance device according to claim 10, wherein the magnetic element comprises a toric magnet and a magnet guide. 14. A breathing assistance device according to claim 13, characterized in that the electromagnetic obstruction means is mounted transverse to the gas transmission duct. 15. A breathing assistance method for assisting a patient with a breathing assistance device according claim 1, wherein the leakage orifice is at least partially opened in the absence of signal from the controlling means. 16. A breathing assistance method for assisting a patient according to claim 15, wherein the leakage orifice is totally obstructed during inspiration and at least partially opened during expiration. 17. A breathing assistance method for assisting a patient according to claim 16, wherein the leakage orifice, during expiration phases, is opened so that positive expiratory pressure remains equal to expiration pressure of the patient. 18. A breathing assistance method for assisting a patient according to claim 15, wherein the leakage orifice is totally opened in of the event the source of respiratory pressurized gas fails.