An air delivery system includes an air flow generator to provide a pressurized flow of air, a patient interface to provide a seal with the patient's face in use, an air delivery conduit to interconnect the air flow generator and the patient interface, and a controllable vent valve to control venting from the patient interface. The vent valve is controlled to maintain a substantially constant air flow in the air delivery conduit and the air flow generator.

Embodiments of the present invention provide systems and methods for delivering respiratory treatment to a patient. For example, a treatment system may include a mechanism for delivering a positive pressure breath to a patient, and one or more limb flow control assemblies which modulate gas flow to and from the patient. Exemplary treatment techniques are embodied in anesthesia machines, mechanical ventilators, and manual ventilators.

Gas flow reversing element (1) for the use of a gas supply (14) under excess pressure, in particular inspiratory gases, for selectively generating a gas flow (8) from or to a line connector (6) which can in particular be connected to an airway of a patient, said gas flow reversing element (1) being designed as a main piece (2), the main piece (2) at least comprising an inflow region (9), a nozzle region (15) and a mixing region (16), and further a branching piece (3), the inflow region (9) connecting a pressure connector (4), for connection to the gas supply (14), to at least one closable outlet opening (5) arranged in the mixing region (16), and the branching piece (3) connecting the nozzle region (15) of the main piece (2) to the line connector (6), wherein a nozzle (7), particularly an injector nozzle, is configured and arranged in the nozzle region (15) in such a way that, a gas flow (8) flowing along a first flow path (20) through the main piece (2) from the pressure connector (4) subsequently through the inflow region (9), the flow region (28), the nozzle region (15) and through the nozzle (7) into the mixing region (16) to the outlet opening (5), with the outlet opening (5) opened, can generate a gas flow (8) in the branching piece (3) flowing along a second flow path (21) from the line connector (6) and subsequently through the branching piece (3), through the nozzle region (15) and through the mixing region (16) to the outlet opening (5), wherein the gas flow reversing element (1) further comprises a bypass (18) connecting the pressure connector (4) and the line connector (6) so that a gas flow (8) can flow along a third flow path (22) via the inflow region (9), the bypass (18) and the branching piece (3), wherein at least the bypass (18) and the flow region (28) are closable by at least one closing element (19), so that the gas flow (8) can bypass the nozzle (7) in the nozzle region (15) via the bypass (18) along the third flow path (22). The invention further relates to method for controlling expiration of a patient.

A respiratory assistance device (1) for a patient, includes a tubular element forming a main channel (5) (207) which is to be connected via the distal end (7) thereof to an airway of the patient, the main channel connecting to the exterior of the respiratory system of the patient via the proximal end (6) thereof, the device further including at least one auxiliary channel (8) (209) allowing the injection of jets of breathable gas for ventilation of the patient via the distal outlet openings (17) of the auxiliary channel(s), the outlet openings opening out into the main channel in the vicinity of the distal end thereof, deflection elements (14b) (14a) allowing the deflection of gas jets to the interior of the main channel, and an internal jet separator, coaxial and central to the main channel, which further ensures diversion of the flow for expired gases.

A respiratory assistance apparatus includes a conduit connecting a flow generator and an outlet. The conduit includes a venture formation. The apparatus further includes an oxygen inlet in fluid communication or selective fluid communication with an oxygen outlet. The oxygen outlet is directed into the conduit and toward a mouth of the venture formation. The flow generator provides a flow path for air to enter the conduit when the flow generator is not operating.

Medical techniques include systems and methods for administering a positive pressure ventilation, a positive end expiratory pressure, and a vacuum to a person. Approaches also include treating a person with an intrathoracic pressure regulator so as to modulate or upregulate the autonomic system of the person, and treating a person with a combination of an intrathoracic pressure regulation treatment and an intra-aortic balloon pump treatment.

The percussive ventilation breathing head is adapted to be supplied with a flow of pulsatile gas fed to an elongated breathing head body at a proximal end thereof. The breathing head body defines an interior passageway therein. A reciprocating injector shuttle is movably mounted in the breathing head passageway. The shuttle moves distally due to the pulsatile gas, assisted by a diaphragm and a venturi-like jet nozzle which nozzle pulls nebulized aerosol from a depending plenum and a nebulizer attached below the depending plenum. A depending body defines the plenum. The generally cylindrical nebulizer is attached below the depending body. The shuttle is also biased in a proximal direction within the interior passageway and moves proximally due to the bias. The shuttle defines an internal flow passage from a proximal shuttle input port to a distal shuttle output port at the distalmost mouth of the percussive ventilation breathing head body.

A respiratory assistance apparatus includes a conduit connecting a flow generator and an outlet. The conduit includes a venturi formation. The apparatus further includes an oxygen inlet in fluid communication or selective fluid communication with an oxygen outlet. The oxygen outlet is directed into the conduit and toward a mouth of the venturi formation. The flow generator provides a flow path for air to enter the conduit when the flow generator is not operating.

For a ventilating appliance (1) consisting of a ventilating device (2) having an air outlet channel (3) and an air inlet channel (4), two hoses (5, 6) which are connected to one of the two channels (3, 4) of the ventilating device (2), an air distributor (7), on which three openings (8, 9, 10) are provided, which are coupled to one of the two hoses (5, 6) of the ventilating device (2) and to a tube (11) which can be inserted into the mouth or nose space (22) of a living being (21), shall the ventilating appliance (1) be improved that a patient to be ventilated undergoes a release of mucus and its removed from the lung area with cost-effective measures, without the need for foreign objects or switching off the ventilating appliance (1). This is solved in that a respiratory tract therapy device (31) is inserted in the inhalation hose (5), in that an air flow (12) is generated by the ventilating device (2), through which an intermittent air pressure fluctuation arises with the respiratory tract therapy device (31), and in that the air pressure fluctuations generated in this way are passed on or transmitted in the lung region (23) of the living being (21).

A gas flow reversing element is provided comprising a main piece defining at least one closable outlet opening, a branching piece extending from the main piece, a line connector connected to the distal end of the branching piece, a pressure connector connected to the main piece, the pressure connector being structured to be fluidly connected to a pressurized gas supply; and a nozzle being configured and arranged in the main piece in such a way that a gas flow flowing in the main piece from the pressure connector through the nozzle to the at least one outlet opening, with the at least one outlet opening being disposed in the second open position, a gas flow can also be generated in the branching piece in a direction toward the at least one outlet opening.