A safety breathing apparatus has a sensor for measuring the difference in pressure between two point 1a, 1b in the gas delivered to a head unit 9. The sensor is used to measure the difference in the pressure of the gas supplied through the apparatus between the two points in the gas flow, and the pressure difference is then used to calculate the gas flow rate.

Disclosed is a port connector for respiratory gases tubes. The port connector having a port extending from the port connector, the port providing for a passageway into a lumen of the port connector. The port having a connection mechanism, and a port sealing surface. The port connector may further comprise a connector elbow having an accessory end configured to connect with an accessory, a connector elbow sealing surface, and a collar located at a port end of the connector elbow. The collar may be configured to engage with the connection mechanism of the port connector to urge a connector elbow sealing surface into engagement with a port sealing surface.

Disclosed is a port connector for respiratory gases tubes. The port connector having a port extending from the port connector, the port providing for a passageway into a lumen of the port connector. The port having a connection mechanism, and a port sealing surface. The port connector may further comprise a connector elbow having an accessory end configured to connect with an accessory, a connector elbow sealing surface, and a collar located at a port end of the connector elbow. The collar may be configured to engage with the connection mechanism of the port connector to urge a connector elbow sealing surface into engagement with a port sealing surface.

A sedation device has a housing divided internally into a ventilator chamber and an associated evaporator chamber which overlap and are separated by a filter mounted between the chambers and forming a common gas-permeable dividing wall between the chambers. An inlet port is provided at one end of the ventilator chamber at a top of the housing for connection to a patient ventilator in use. An outlet port on the evaporator chamber can be connected via a breathing tube to a patient. An evaporator is mounted within the evaporator chamber for delivery of a volatile sedative into the evaporator chamber during use.

A medical tube is provided which can reduce the acoustic power level therein when air is supplied through the tube. The medical tube includes: a reference side bellows tube portion configured to be a flexible bellows-like tube including a plurality of reference rings in series in an axial direction, the reference rings each extending annularly or helically to form a ring; and a deformed side tube portion configured to be a tube shaped differently from the reference side bellows tube portion. Here, a plurality of the reference side bellows tube portions and a plurality of the deformed side tube portions are alternately arranged in the axial direction. At least one of the reference side bellows tube portions has an axial length less than 112 mm.

A heated conduit is configured to connect to and receive pressurized breathable gas from a respiratory unit. The heated conduit includes a first cuff that includes an air inlet portion and an electrical connector portion that is adjacent the air inlet portion and comprises three electrical terminals that are configured to engage a respiratory unit electrical connector. The heated conduit also includes a second cuff comprising an air outlet and a flexible tube portion with a first end connected to the first cuff, a second end connected to the second cuff, and a spiral rib structure wrapped around a central lumen. A grouping of wires is supported within the spiral rib structure of the flexible tube portion and include a pair of heating wires and a signal wire. A sensing device extends into the gas flow path from an interior surface of the second cuff and is configured to output a signal indicative of the condition inside the heated conduit.

A system for preventing cross-contamination in single-limb ventilators is described. In one embodiment, the system includes an airflow generator connected in-line to a humidifier, a first check valve and a patient interface by a gas flow circuit. A controller is electrically coupled to the airflow generator, and a cartridge is connected to the gas flow circuit between a first point downstream of the humidifier and a second point upstream of the patient interface. The cartridge includes a bacteria filter and the first check valve. A method for preventing cross-contamination in single-limb ventilators and a method for providing gaseous flow through a single-limb ventilator are also described.

A device is provided that humidifies breathing gas. The device has a chamber with an inlet and an outlet. A chemical heater is positioned within the chamber and a trigger activates the heater. The chamber can be a conduit with an inner wall and an outer wall with a reservoir defined therebetween. The chemical heater can be positioned within the reservoir.

This disclosure describes systems and methods for managing a move of a patient being monitored or treated by a medical system, such as a medical ventilator. The disclosure describes a novel approach for preventing a patient from being moved from a first location to second different location that is connected to a monitoring and/or treatment system, before all of the necessary hoses have been disconnected from the patient. Further, the disclosure describes a novel approach of ensuring that all of the necessary hoses are reconnected to a patient being monitored or treated by a monitoring and/or treatment system after being moved from the first location to the second different location.

An interface for positive pressure therapy includes a mask assembly and a headgear assembly. The mask assembly comprises a mask seal that is adapted to underlie the nose. The mask seal extends up the lateral sides of the nose. The mask seal has a primary seal below the nose and a secondary seal alongside the nose.