A neck strap, a crown strap assembly and a headgear for a breathing mask. The neck strap for a headgear includes a one-piece main body adapted to engage a patient's neck, first and second lower connection portions adapted to connect to first and second lower mask connection straps, and first and second upper connection portions adapted to connect to respective first and second lateral crown straps.

A nasal patient interface arrangement is for transporting breathing gas from a pressurized gas supply to a patient. The arrangement provides a first bidirectional gas passage in contact with ambient air and receives nasally expired air. The arrangement includes an inspiratory air conduit connecting to a pneumatic unit. The arrangement also includes a nose adapter for bidirectional gas transport. The nose adapter is connected to a nose of the patient. The arrangement further includes a valve arrangement controlling the passage of gas through the first bidirectional gas passage. The arrangement provides a second bidirectional gas passage which is connected to the inspiratory air conduct, the nose adapter, and the first gas passage. The valve arrangement is substantially enclosed in the first bidirectional gas passage.

A patient interface is configured to deliver a pressurized flow of respiratory gas to a patient's airways. The patient interface includes a cushion and shell assembly with a cushion portion mounted on a shell portion that is more rigid than the cushion portion. The cushion portion is configured to sealingly engage the patient's face and has a vent opening. The shell portion includes a plurality of headgear connectors. The patient interface further includes a gas washout vent assembly configured to be positioned within the vent opening of the cushion portion. The gas washout vent assembly includes a main body configured to be secured to the cushion portion, a porous body, and an outer cover with a plurality of openings. The main body at least partially houses the porous body and the outer cover.

An exhalation valve arrangement (22) for a ventilation apparatus for artificial ventilation of patients is flow-capable in an exhalation flow direction (E) and encompasses: an upstream respiratory gas conduit (54) that extends along a first conduit path (K1) and is connected or connectable to a portion, coming from the patient, of the exhalation line; a downstream respiratory gas conduit (58) that extends along a second conduit path (K2) and is connected or connectable to a respiratory gas sink (U); a valve subassembly (63) which comprises a valve body (64) and a valve seat (66) and which is provided between the upstream and the downstream respiratory gas conduit (54, 58) in such a way that, in the context of a predetermined first respiratory gas overpressure in the upstream respiratory gas conduit (54) relative to the downstream respiratory gas conduit (58), it permits an expiratory respiratory gas flow from the upstream respiratory gas conduit (54) into the downstream respiratory gas conduit (58); and in the context of a predetermined second respiratory gas overpressure in the downstream respiratory gas conduit (58) relative to the upstream respiratory gas conduit (54), it blocks a gas flow from the downstream respiratory gas conduit (58) into the upstream respiratory gas conduit (54). Provision is made according to the present invention that the exhalation valve arrangement (22) comprises a bypass chamber (74) which communicates in terms of flow mechanics with the upstream respiratory gas conduit (54) and which extends, proceeding from the upstream respiratory gas conduit (54), into the region of the downstream respiratory gas conduit (58) and is embodied there for attachment of a gas pressure sensor (80).

A ventilator system including an oxygen delivery cylinder, an air delivery unit, connecting tubes, and a digital display unit. The system further includes a Y connector configured to mix air and oxygen, to form a gas and pass said gas towards an outlet of the system. A water manometer that is configured to monitor a pressure of the gas in the system and blow off the excess pressure of the gas. A solenoid valve that is configured to adjust an end respiratory pressure obtained from a breathing device connected to the outlet of the system. The pressure of the gas being instantly delivered to the breathing device is measured by water manometer from a dead space near the outlet, thereby enabling a dual monitoring of the gas pressure being delivered to the breathing device.

A positive airway pressure device is disclosed herein. The positive airway pressure device includes a blower, a buffer chamber, a gas manifold, a first sensor, a second sensor, and a controller. The buffer chamber is downstream of the blower. The buffer chamber configured to receive gas generated by the blower and output the gas to a patient. The gas manifold is fluidly coupling the blower to the buffer chamber. The first sensor is at least partially disposed in the gas manifold. The first sensor is configured to measure a first pressure in the gas manifold. The second sensor is at least partially disposed in the buffer chamber. The second sensor is configured to measure a second sensor in the buffer chamber.

A medical breathing gas delivery system design employs a manifold delivering gas in a controlled fashion to patients which includes two inhaled gas one-way valves, at least one pressure sensor for patient airway pressure monitoring, and one controlled exhalation pressure proportional control valve which may be overridden by patient exhaled pressure or if there is a power loss. The manifold is connected to a controlled source of breathing gas which may, for example, be a variable-speed fan, or a pressure-based gas flow controller with dynamic self-calibration employing a fast-acting valve and a pressure sensor, either of which yield predictable gas flow control with a minimum of components. The manifold exhalation pressure control valve and gas flow source may, for example, be controlled with a computer system which adjusts the valve power waveforms to attain the time-varying flow and pressure curves required by clinicians, then stores and displays the waveforms to enable long-term trend monitoring and alarm generation. Accurate gas mixing using the pressure-based gas flow control yields automatically calibrated mixes which are of use for patients in, for example, intensive care ventilation and in anesthesia machines for operating rooms.

The present invention relates to a tracheal coupling comprising a patient port 33, an outlet port 36, an inlet port 31 between the patient port and the outlet port, such that flow 34 from the inlet port can go to the patient port or direct to the outlet port, and a flow restriction e.g. 32 between the inlet port and the outlet port, or at the outlet port.

A shroud for a mask system includes a retaining portion structured to retain a frame, a pair of upper headgear connectors each including an elongated arm and a slot at the free end of the arm adapted to receive a headgear strap, and a pair of lower headgear connectors each adapted to attach to a headgear strap. The retaining portion, the upper headgear connectors, and the lower headgear connectors are integrally formed as a one piece structure.

A nasal cannula is described herein for respiratory therapy which includes a first gas supply tub with a distal end terminating in a first connector, and a nasal cannula body which includes a first end rotatably coupled to the first connector, a second end opposite the first end, a longitudinal axis extending from the first end to the second end, and a first nasal prong in fluid communication with the first gas supply tube. The first nasal prong is rotatable relative to the first gas supply tube about the longitudinal axis of the nasal cannula body.