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.

In a first embodiment, a ventilator has a housing with a first fixed port and a rotatable shutter configured to cooperate with the housing to enclose an interior of the housing. The shutter has a first orifice at a first radial distance from its axis of rotation. A stationary plate abuts the shutter and includes a first stationary orifice configured to at least partially align with the first orifice of the shutter over a first rotational distance of the shutter. In this way, the first orifice and the first stationary orifice form a first variable port. The stationary plate may have a second stationary orifice and the shutter may have a second orifice configured to at least partially align with the second stationary orifice over a second rotational distance of the shutter.

A respiratory device provides respiratory support to a patient. The respiratory device includes an expandable bag and a rigid valve housing. The expandable bag has an air inlet valve as well as a first and second sides that are bounded, respectively, by first and second rigid side panels. Each of the first and second rigid side panels includes a biasing member projection. The rigid valve housing is in fluid communication with the expandable bag. The rigid valve housing includes an adjustable tidal volume control device that interfaces with the biasing member projection of each of the first and second rigid side panels to set one of a plurality of predetermined tidal volumes for the expandable bag in an uncompressed or compressed configuration. The rigid valve housing additionally includes a patient breathing interface connection member.

Cartridges for vaporizer devices are provided. In one exemplary embodiment, the cartridge can include a reservoir housing, an airflow tube that extends through the reservoir housing, and a folded mesh that is disposed within the airflow tube and includes a plurality of folds. The airflow tube defines a passageway extending therethrough and at least a portion of the airflow tube is permeable to the vaporizable material, in which the permeable portion of the airflow tube is configured to draw vaporizable material from the reservoir housing into the airflow tube for vaporization. The folded mesh is configured to change from a deactivated state to an activated state in response to receiving an electric current, and when in the activated state, the folded mesh is configured to generate an amount of heat that is sufficient to vaporize at least a portion of the vaporizable material drawn from the reservoir housing. Vaporizer devices are also provided.

A cuff pressure management device (10) for a tracheal breathing tube (54) with an inflatable cuff (90), comprises a volume displacement subsystem (36), a pressure transducer (44), a compliance determination circuit (34), and a cuff pressure controller (24). The volume displacement subsystem provides (i) a measured volume of pressurized gas to and from the cuff and (ii) a cuff gas volume signal. The pressure transducer provides a cuff gas pressure signal. The compliance determination circuit is configured to calculate cuff compliance and an estimated tracheal airway compliance based on the gas volume signal and the gas pressure signal. The cuff pressure controller is in controlling communication with the volume displacement subsystem and the compliance determination circuit to maintain cuff pressure based on the calculated cuff compliance.

Disclosed is a connecting piece for artificial respiration. The connecting piece comprises an opening that faces a ventilation hose, an opening disposed toward a patient interface, and an opening to the atmosphere which can be at least partially closed from the inside by a diaphragm. The connecting piece further has a diaphragm opening for accommodating the diaphragm into the connecting piece, the diaphragm being held via a diaphragm ring that surrounds the connecting piece.

A face mask including a base model of a mask body having a front side and a back side and defining an interior. The back side includes a face opening within which a portion of a user face including a nose and mouth can be inserted and encompassed. The face opening is defined by a perimeter and is modified to substantially correspond to contours of the user face based on scan of topographical facial features of the user face.

There is a ventilator for mechanical ventilation during a breathing cycle including an inhalation cycle and an exhalation cycle. The ventilator is configurable to be in fluid communication with a supply of a first fluid. The ventilator includes an inhalation pathway and an exhalation pathway. A first fluid injector is in fluid communication with the supply of the first fluid for injecting the first fluid. The inhalation pathway receives the first fluid injected by the first fluid injector. A controller is operatively connected with the first fluid injector and programmed to selectively actuate the first fluid injector to inject the first fluid, which is received within the inhalation pathway such that an inhalation pressure in the inhalation pathway is within a predetermined range during the inhalation cycle.

The present invention relates to a device (100) and a system for positive pressure ventilation (PPV) and continuous positive airway pressure (CPAP) treatment comprising a fresh gas flow inlet (2), arranged to receive a fresh gas flow from a fresh gas flow tube (22) connectable thereto; a patient interface end (3), arranged to be connected with a patient interface; an outlet (4) having an open end (5); a variable flow CPAP generator (6) comprising first, second and third connection portions (10, 11, 12), wherein the first connection portion is connected with the fresh gas flow inlet, the second connection portion is connected with the patient interface end, and the third connection portion is connected with the outlet, wherein the generated CPAP level is adjusted by varying the fresh gas flow to the variable flow CPAP generator. The device further comprises an internal leakage channel (9) arranged to extend between the fresh gas flow inlet and at least one of the patient interface end and the outlet, such to create an internal fresh gas leakage flow there between, bypassing the first connection portion of the variable flow CPAP generator, which is added to the fresh gas flow provided by the variable flow CPAP generator in the PPV mode. A simplified device and system is provided, respectively, which is easy to use and allows for a rapid switch between PPV and CPAP treatment without change of equipment.

The present invention relates to a device (100) for positive pressure ventilation (PPV) and continuous positive airway pressure (CPAP) treatment comprising a fresh gas flow inlet (2) arranged to receive a fresh gas flow from a fresh gas flow tube connectable thereto; a patient interface end (3) which is connectable with a patient interface; an outlet (4) having an open end (5); and several variable flow CPAP generators (6), wherein each of the several variable flow CPAP generators is connected with the fresh gas flow inlet, the patient interface end and the outlet of the device. A simplified device and system is provided, respectively, which is easy to use and allows for a rapid switch between PPV and CPAP treatment without change of equipment.