A gas valve system adapted for controlling the flow of a gas for a user is disclosed. The gas valve system comprises a housing, at least one sensor, one or more electronic and/or mechanical components for controlling the gas flow, and a manifold comprising one or more channels for guiding the gas between an input and an output of the gas valve system and to which the at least one sensor and one or more electronic and/or mechanical components can be coupled.

The invention relates to a gas delivery apparatus (1) having an internal gas passage (100), a deformable reservoir (27), a valve device (22), and a control unit (50) with microprocessor (51) controlling the valve device (22) in order to set or adjust the flow rate of gas passing through said valve device (22). A flow rate determination device (60) makes it possible to perform measurements of pressure or flow rate in the internal gas passage (100) and to transmit these measurements to the control unit (50). A pressure sensor (55) performs gas pressure measurements (P.sub.55) on the therapeutic gas feeding the deformable reservoir (27) and supplies them to the control unit (50). A breathing mask (10) is in fluidic communication with the internal gas passage (100) in order to be fed with therapeutic gas coming from the deformable reservoir (27).

The invention relates to an installation (40) for supplying therapeutic gas, comprising a source (3) of therapeutic gas, a gas delivery apparatus (1) and a respiratory interface (10). The gas delivery apparatus (1) comprises a deformable reservoir fed with gas, a control unit with microprocessor which controls a valve device for controlling the flow rate of gas, a pressure sensor configured to perform gas pressure measurements at the respiratory interface (10) and to supply the gas pressure measurements to the control unit, a flow rate sensor to measure the flow rate of gas supplied and to supply the gas flow rate measurements to the control unit, and alarm means. The control unit is configured to estimate the leaks at the respiratory interface on the basis of the measurements of pressure and of flow rate, in order to ensure a correct concentration of the therapeutic gas in the respiratory interface.

A pulsed oxygen delivery system is disclosed for a closed breathing environment, which includes a source of gaseous oxygen, a phase dilution type oronasal dispensing mask worn by a user in a closed breathing environment defined by a pressure suit, and a pulse control module for delivering a timed and metered bolus of oxygen from the source of gaseous oxygen to the oronasal dispensing mask upon inhalation by the user.

A ventilator includes a ventilation drive configured to drive ventilation gas from a gas source to a patient and a patient interface section configured to guide inspiratory gas from the ventilation drive to a patient connection, receive expiratory gas from the patient connection, and expel the expiratory gas out of the ventilator. The ventilation drive and patient interface section are configured to removably connect to at least one host comprising a ventilation path portion so as to divert the inspiratory gas through the ventilation path portion of the host when connected thereto.

A ventilator system includes a ventilator and a host. The ventilator comprises a ventilation drive configured to drive ventilation gas from a gas source to a patient and a patient interface section configured to guide inspiratory gas along an inspiratory path from the ventilation drive to a patient connection, and guide expiratory gas along an expiratory path from the patient connection out of the ventilator. The patient interface section is configured to releasably connect to the ventilation drive. The ventilator is configured to removably connect to the host such that at least one of the inspiratory path and the expiratory path are diverted through the host when the ventilator is removably connected to the host.

A portable ventilator includes a ventilation drive configured to drive ventilation gas from a gas source to a patient, wherein the portable ventilator is configured to removably connect to a host such that when the portable ventilator is connected to the host the ventilation drive drives ventilation gas from a host gas source to the patient and when the portable ventilator is not connected to the host the ventilation drive drives ventilation gas from a portable gas source to the patient.

A system for artificial ventilation including a convertible ventilator circuit having at least one inspiratory filter and at least one expiratory filter. The convertible ventilator circuit compatible with and configured to be used with either a manual ventilator or a mechanical ventilator. The convertible ventilator circuit configured to convert between manual ventilation use and mechanical ventilation use. The system including a patient manifold having one or more sensor ports and a data acquisition unit having one or more sensors configured to interface with the one or more sensor ports of the patient manifold. The data acquisition unit configured to receive electronic data associated with transmission of respiratory gases through the convertible ventilator circuit.

Apparatus, systems and methods are described, such as for providing, or controlling mechanical ventilation provided to, a patient. A controller may control a gas delivery system to deliver gas to the patient according to a FiO2 setting and a PEEP setting. The controller may adjust the FiO2 setting to an updated FiO2 setting based at least in part on a determined oxygen concentration of the patient's blood and may update the PEEP setting based at least in part on the updated FiO2 setting. Furthermore, the controller may update the PEEP setting based at least in part on the updated FiO2 setting and the current PEEP setting. An updated PEEP setting may be based at least in part on PEEP change eligibility rules and PEEP selection rules. The FiO2 setting may be adjusted so as to relatively rapidly increase the FiO2 setting in response to a rapidly decreasing patient SpO2.

A fluid delivery system provides fluid, such as supplement oxygen, to a patient in response to inhalation. The fluid delivery system includes a valve assembly that is triggered by sensing onset of inspiration by measuring a change in temperature of air flow in a nasal or oral cannula, mask or helmet.