A device and a process for mixing at least a first gas component with a second gas component is suitable for mixing gases in a portable respirator. The gas mixer device makes it possible to bring about the particularly necessary concentration of the first gas component at different volume flows of the gas mixture generated. The gas mixer device has a plurality of ejectors (1, 2) of different sizes, which are designed according to the principle of a venturi nozzle. The ejectors have respective propellant gas connections (3, 9) for feeding the first gas component from a propellant gas container (4) and suction channels (5, 10) for feeding the second gas component from a mixing chamber (6), as well as gas outlets (8, 11) to a respiration connection (7). An evaluating and control unit (17) evaluates the signals of two volume flow sensors (15, 16) and correspondingly actuates proportional valves (13, 14) arranged in the propellant gas connections (3, 9) for feeding the first gas component. For small respiration flows, the proportional valve (13) in the propellant gas connection (3) for the smaller ejector (1) is actuated by the evaluating and control unit (17) for opening, the proportional valve (14) in the propellant gas connection (9) for the larger ejector (2) is actuated for opening in the case of medium respiration flows, and both proportional valves (13, 14) are actuated by the evaluating and control unit (17) for opening for high respiration flows.

Apparatus for delivery of humidified gases therapy includes a humidifier. A recorder records. An output interface allows for outputting of the recorded data. The recorder may also record data indicative of patient compliance with the humidified gases therapy. The apparatus may determine patient compliance from sensed delivered flow.Recorded humidity and compliance data retrieved from the apparatus are useful in methods for improving the efficacy of humidified gases therapy or diagnosing problems with the efficacy of humidified gases therapy.

A device for reducing dead space in a ventilator system has a first tube connectable to the dead space in the ventilator system for producing a flow path for the transport of gas from dead space in the ventilator system, a suction device connected to the first tube for generating an adjustable negative pressure in the first tube, a second tube connectable to dead space in the ventilator system, for producing a flow path for the transport of gas to dead space in the ventilator system, a pump connected to the second tube for generating an adjustable positive pressure in the second tube, and a control unit which regulates the suction device and the pump. The suction device and the pump are formed by a first chamber and a second chamber, respectively, in an enclosure, separated by a gas-tight, moving partition. The control unit regulates the moving partition to regulate the suction device and the pump for achieving simpler and more reliable operation.

A nitric oxide delivery device is provided that can be formed as a module that is insertable in a mating equipment bay in a gas delivery system found in one location, removed and used in conjunction with a transport gas delivery system when the patient is transported, and thereafter inserted in the equipment bay of a gas delivery system located at a second location. In a preferred embodiment, the device includes a housing having an NO supply port, an NO delivery port, a flow sensor port, and a conduit pneumatically connected to the NO supply port and the NO delivery port. A selector valve is positioned in the conduit and selectively moves between a first position wherein the NO supply port is pneumatically connected to the NO delivery port and a second position wherein the NO delivery port is pneumatically connected to a temporary supply of NO. The housing further has a power supply port, a temporary power source and a switch being selectively movable between a first position wherein power is provided to the NO delivery device via the power supply port and a second position wherein power is provided to the device from the temporary power source.

A purge valve includes an aperture, a member, and an actuator. The aperture defines a portion of a vapor flow path that extends between a first port that communicates vapor with a fuel vapor collection canister and a second port that communicates vapor with an intake manifold. The member is displaced with respect to the aperture between a first configuration wherein the member occludes the aperture and a second configuration that permits vapor flow along the vapor flow path. The actuator displaces the member between the first and second configurations and includes an armature and a stator. The stator includes a winding that extends along an axis. And the armature, which is coupled to the member, surrounds the winding and includes a permanent magnet.