An apparatus for humidifying a flow of pressurised, breathable air includes varying a first pressure of the flow of breathable gas to vary a level of thermal engagement between the conductive portion of the reservoir and the heater plate, varying a height of the variable portion varies a level of thermal engagement between the conductive portion of the reservoir and the heater plate, use of a humidifier reservoir base component with a maximum water capacity substantially equal to the predetermined maximum volume of water of the humidifier reservoir or the use of intersecting inlet and outlet axes.

Sound-proofing housing (31), which comprises a first housing part (41) having an intake opening (44) and comprises a second housing part (51) having a discharge opening, wherein a shaped part (61) arranged in the housing (31) is also provided, of which the flange seal (63) comes to rest between the housing parts (41, 51) when the housing (31) is put together. The acoustic emission generated by the fan is considerably reduced by a specific embodiment of the shaped part (61) with air passage openings and air-guiding devices.

Start-up protocols for a device and method for administering NO is described.

An apparatus for humidifying a flow of pressurised, breathable air includes varying a first pressure of the flow of breathable gas to vary a level of thermal engagement between the conductive portion of the reservoir and the heater plate, varying a height of the variable portion varies a level of thermal engagement between the conductive portion of the reservoir and the heater plate, use of a humidifier reservoir base component with a maximum water capacity substantially equal to the predetermined maximum volume of water of the humidifier reservoir or the use of intersecting inlet and outlet axes.

A compressor (1), or ventilator/anesthesia device with the compressor, includes a housing, a rotatable impeller (6) connected via a drive shaft (4) to an electric motor (5) to deliver gas from an inlet (8), upstream on a suction side (7) through a flow duct (11) to a downstream outlet (10) on a delivery side (9). The compressor impeller is partially enclosed by the housing, as a collection housing (2) on the delivery side, and a cover element (12), on the suction side separated in sections from the compressor impeller by a gap (13). An uncoupling element (15) is arranged, for vibration damping and for at least partial sealing of the housing interior against a surrounding area (16), between the cover element and the collection housing and between a functional component (14) connected at least indirectly to the compressor impeller and/or to the electric motor and the collection housing.

A valve with an internal member is disclosed which allows exhaled carbon dioxide to escape from a breathing circuit when the circuit gas pressure drops below a threshold pressure. The valve operates by occluding one or more ports under a relatively high pressure and opening the one or more ports under a relatively low pressure. The internal member is attached to the body of the valve at two or more locations on the internal member. The internal member moves in a direction perpendicular to the gas flow through the valve.

A pump device as may be used in a breast pump assembly including a pump configured to put fluid in motion, a housing accommodating the pump, at least one fluid transporting conduit connected to the pump, the at least one conduit extending between the pump and the housing, thereby connecting the pump to a position at the housing where the housing is provided with at least one opening for allowing fluid to pass, and a mounting arrangement for mounting the pump in the housing. The at least one conduit is part of the mounting arrangement and has flexible properties to reduce an extent to which vibrations of the pump are transferred to the housing through the mounting arrangement during operation of the device.

A drive mechanism for a drug delivery device with a reduced operating loudness includes a dose selector, a housing, and a ratchet with a gear element comprising a plurality of gear teeth connected with the dose selector and a pawl element rotationally constrained to the housing comprising at least one pawl tooth. The at least one pawl tooth engages with the gear teeth and is located opposite to the gear teeth. One of the gear element and the pawl element moves forth and back relative to the other element of the gear and pawl elements along a first direction for de-engagement and re-engagement of the opposite gear teeth and at least one pawl tooth when the gear element rotates relative to the housing during dose setting using the dose selector. The pawl element and/or gear element comprises a noise reduction characteristic at a surface which dampens the noise produced.

A reservoir configured to retain a volume of liquid for use in an apparatus for humidifying a flow of pressurised air comprises a base portion and a lid portion. The reservoir may be configured to improve its level of thermal contact to the heater plate using the flow of pressurised air. The reservoir may be configured to improve thermal contact between the reservoir and the heater plate by pre-compression upon engagement of the reservoir with the humidifier. The reservoir may comprise a removable intermediate portion, which may include the inlet tube and/or the outlet tube, for improved access for cleaning. The reservoir may also be configured to prevent overfilling. Overfill prevention features in the reservoir may include defined flow egress paths and/or formation of air locks.

A PAP system for delivering breathable gas to a patient includes a flow generator to generate a supply of breathable gas to be delivered to the patient; a humidifier including a heating plate to vaporize water and deliver water vapor to humidify the supply of breathable gas; a heated tube configured to heat and deliver the humidified supply of breathable gas to the patient; a power supply configured to supply power to the heating plate and the heated tube; and a controller configured to control the power supply to prevent overheating of the heating plate and the heated tube.