A ventilator includes a bidirectional breath detection airline and a flow outlet airline. The flow outlet airline includes an airline outlet. The flow outlet airline is configured to be connected to an invasive ventilator circuit or a noninvasive ventilator circuit. The breath detection airline includes airline inlet. The airline inlet is separated from the airline outlet of the flow outlet airline. The ventilator further includes a pressure sensor in direct fluid communication with the breath detection airline. The pressure sensor is configured to measure breathing pressure from the user and generate sensor data indicative of breathing by the user. The ventilator further includes a controller in electronic communication with the pressure sensor. The controller is programmed to detect the breathing by the user based on the sensor data received from the pressure sensor.

A passive valve for use as a fixed leak valve. The valve includes a body having an internal chamber, first and second body ports in fluid communication with the chamber with the first port configured for fluid communication with a patient connection and the second body port configured for fluid communication with a ventilator, a body passageway in fluid communication with the chamber and with ambient air exterior of the body, and a check valve seal positioned to seal the body passageway to permit the flow of gas within the chamber through the body passageway to the exterior of the body and to prevent the flow of ambient air exterior of the body through the body passageway into the chamber. In alternative embodiments, the valve is incorporated into the patient connection or constructed as a separate part connectable to the patient connection.

The invention relates to a two-stage method for recovering halogenated hydrocarbons. In a desorption step, steam is passed through an adsorbent comprising adsorbed halogenated hydrocarbons, which produces a secondary flow volume containing halogenated hydrocarbons. The secondary flow volume is converted into a condensate containing halogenated hydrocarbons and water by cooling, from which condensate the halogenated hydrocarbons are separated. In a sterilisation step that precedes the desorption step, the adsorbent comprising adsorbed halogenated hydrocarbons is brought into contact with steam for at least 10 minutes at a temperature of more than 120° C. and at a pressure between 0.15 MPa and 0.4 MPa.

Apparatus, such as a portable oxygen concentrator (100) or other device communicating therewith, may be configured, such as with a processor(s), to estimate a remaining capacity of a sieve bed of the concentrator. Such apparatus may be configured to access a parameter of a measured pressure-time characteristic of the sieve bed for a phase of a pressure swing adsorption cycle of the oxygen concentrator. The apparatus may be configured to access function(s) of the parameter of the pressure-time characteristic and operational characteristic(s) of the sieve bed. The apparatus may be configured to estimate the remaining capacity by applying the function(s) to the parameter of the measured pressure-time characteristic. Such an estimate may then serve as a basis for providing notification, such as on a display or by electronic messaging, to inform of remaining life of the sieve bed, or otherwise promote timely replacement of a depleting component.

A passive valve for use as a fixed leak valve. The valve includes a body having an internal chamber, first and second body ports in fluid communication with the chamber with the first port configured for fluid communication with a patient connection and the second body port configured for fluid communication with a ventilator, a body passageway in fluid communication with the chamber and with ambient air exterior of the body, and a check valve seal positioned to seal the body passageway to permit the flow of gas within the chamber through the body passageway to the exterior of the body and to prevent the flow of ambient air exterior of the body through the body passageway into the chamber. In alternative embodiments, the valve is incorporated into the patient connection or constructed as a separate part connectable to the patient connection.

A controller can be configured to control a system for extracting liquid water from air comprising a thermal unit, a primary desiccant wheel, and a regeneration fluid path. The controller can comprise a sensor, a motor, and a microcontroller coupled to the sensor and the motor. The microcontroller can be configured to determine a water extraction efficiency based on at least one signal received from the sensor, and also can be configured to maximize the water extraction efficiency by adjusting a speed of the motor in response to the determined water extraction efficiency.

Systems and methods are provided for displaying status of a gas concentrator. The systems and methods include, for example, a display having a plurality of illuminable segments. The illuminable segments can be illuminated to form one or more displays indicating system status. The system status includes, for example, warmup, normal operation, low priority alarm(s), high-priority alarms, etc. In one embodiment, the systems and methods also read oxygen values of the gas concentrating system as one basis for determining system status. Other bases are also disclosed.

Systems and methods are provided for managing medical devices. In one embodiment, medical device usage data is stored on the medical device to indicate the usage, health, and alarm or error codes. The usage data is electronically read and assessed against one or more thresholds to determine if the medical device is operating properly and, hence, can be inventoried for reuse, or is need of service or repair. Other embodiments are also disclosed wherein the medical device wirelessly scan its environment to ensure, for example, the device is used with approved accessories or components and personnel. In yet other embodiments, medical devices are provided that can configure themselves for operation by scanning any connected components for component-specific operational data. The operational data is then used to configure the medical device to operate with the component.

An oxygen production system (100) may include a main control module (120) and a molecular sieve module (140). The molecular sieve module (140) may include a molecular sieve and a molecular sieve information unit. The molecular sieve information unit may be configured to store information of the molecular sieve. The main control module (120) may be configured to read, write and/or update the information of the molecular sieve stored in the molecular sieve information unit. When reading, in response to at least part of the information of the molecular sieve exceeding a preset range, the main control module (120) may control the oxygen production system (100) to perform a corresponding operation. The oxygen production system (100) may occupy small space, have good performance and a high oxygen production efficiency, and enable a user to obtain a more user-friendly experience.

A control circuit of an oxygen concentrator maintains pressure within a compressor of the oxygen concentrator. The control circuit includes a microprocessor that controls functioning of a controller based on two or more of: a user-adjustable flow rate of oxygen delivered by the oxygen concentrator to a user, an ambient temperature, and an ambient pressure. The functioning of the controller further controls the adsorption of various gases by sieve beds of the oxygen concentrator to produce oxygen enriched gas.