Embodiments disclosed herein are directed to ventilation devices, systems, and methods for applying positive end expiratory pressure (PEEP) to the lungs of a patient. For example, applying above atmospheric pressure to the lungs of the patient may mitigate alveolar collapse in the lungs and/or may have other health benefits for the patient.

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.

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.

Embodiments disclosed herein are directed to devices, systems, and methods for mixing and/or blending two or more fluids, such as gases, to produce suitable mixed or blended fluids, such as a breathable gas. For example, the system may control and/or regulate flow from of first fluid from a first source and/or flow of a second fluid from a second source. The system may include a controller that may operate or direct operation of one or more valves to control the flow of the first and second fluids, thereby producing a blended or mixed fluid that has selected concentrations or proportions (or ratios) of the first and second fluids.

A modular monitoring and ventilation system includes a standalone monitor unit for monitoring patient-related parameters that are indicative of the physiological status of a patient, which receives at least one signal indicative of such a patient-related parameter from at least one sensor and that displays information related to that signal on a display, and a standalone, portable pneumatic unit for ventilatory treatment of a patient by supplying breathing gas to the patient. The monitor unit and the pneumatic unit are able to placed in a paired state in which they are communicatively connected to each other for information exchange, and in which those units cooperate to provide ventilatory treatment to the patient, with operation of the portable pneumatic unit being controlled based on the signal that is indicative of the monitored patient-related parameter, received by the monitor unit from the at least one sensor.

A breathing regulator including a first stage regulator, a second stage regulator, a dilution valve, a mixing chamber, and a controller is provided. The first stage regulator is in fluid communication with pressurized source gas. The second stage regulator is in fluid communication with the first stage regulator. The dilution valve is in fluid communication with an ambient gas and includes a size-variable restriction. The mixing chamber is in fluid communication with the second stage regulator, the dilution valve, and a breathing cavity. The controller is in electrical communication with the dilution valve, the second stage regulator, and a plurality of sensors. The controller is configured to: determine a mass flow of the source gas; determine mass flow of the ambient gas; and vary the size-variable restriction of the dilution valve based on the mass flow of the source and/or the mass flow of the ambient gas.

A breathable gas inlet control device permits flow regulation at the inlet of a flow generator for a respiratory treatment apparatus such as a ventilator or continuous positive airway pressure device. The device may implement a variable inlet aperture size based on flow conditions. In one embodiment, an inlet flow seal opens or closes the inlet to a blower in accordance with changes in pressure within a seal activation chamber near the seal. The seal may be formed by a flexible membrane. A controller selectively changes the pressure of the seal activation chamber by controlling a set of one or more flow control valves to selectively stop forward flow, prevent back flow or lock open the seal to permit either back flow or forward flow. The controller may set the flow control valves as a function of detected respiratory conditions based on data from pressure and/or flow sensors.

A ventilator system for providing respiratory support in cases of acute respiratory failure or severe trauma is described. The ventilator system comprises a ventilator and a tubing system. The system is characterized in that the ventilator comprises a continuous bleed valve configured to be open to air flow from the blower at all times when the blower is operating during both inspiration and expiration; thereby providing a minimal amount of pressure within a patient's lungs at the end of each exhalation—positive end expiratory pressure (PEEP). In an embodiment of the invention the system comprises a manifold block configured to hold the main operating elements of ventilator.

A method of providing a pressure support therapy to a patient via a PAP device, includes: providing a flow of a breathing gas at a first pressure to an airway of the patient, receiving a first indication from the patient of an adjustment to the first pressure, responsive to receiving the first indication, providing the flow of breathing gas at a second pressure to the airway of the patient.

A device (102) provides respiratory treatment for SDB (including mild OSA) and other respiratory conditions. A flow generator warms and humidifies gas at controlled flow levels. For example, the device (102) delivers breathable gas to the upper airway at flow rates of about 10-35 Liters/minute. Levels of flow rate, temperature and/or humidification of the device any be automatically adjusted in response to the detection of SDB events. The device may also automatically deliver adjustments of any of the levels in accordance with detected phases of respiratory cycles. In some embodiments, the device automatically delivers distinct levels to either of the nares based on independent control of flow to each nare. A warm-up procedure controls temperature and humidity at a desired target during a ramp-up of flow to the set therapy level. A cool-down procedure controls temperature above the dewpoint to avoid condensation internal to the device and patient interface.