The present invention includes a device for hypoxia training comprising: one or more electrochemical cells each comprising: a cathode and an anode separated by a proton exchange membrane, each of the anode and cathode in communication with an input and an output, wherein the input of the cathode is in fluid communication with ambient air, and wherein the input of the anode is in fluid communication with a source of liquid water; a power supply connected to the one or more electrochemical cells; and a mask in fluid communication with the output from the cathode of the one or more electrochemical cells, wherein oxygen is removed from the ambient air during contact with the cathode when hydrogen ions separated from liquid water by a catalyst on the anode convert oxygen in the ambient air into water.

Disclosed are systems and processes related to cardiopulmonary resuscitation (CPR). One embodiment of the system comprises an inspiration chamber and an expiration chamber, which work cooperatively to provide gas (e.g., Oxygen (O.sub.2)) to a subject (e.g., human patient) during inspiration and extract and expel expired gas (e.g., Carbon Dioxide (CO.sub.2)) from the subject during expiration as a medical professional applies CPR to the subject. In other words, this disclosure provides systems and processes that allow for substantially synchronous chest compressions with positive pressure active inspirations and, also, substantially synchronous chest decompressions with negative pressure active expirations.

A mechanical compressor system is provided for actuating a bag of a bag valve mask. Rotatable track supports are shaped so as to define respective non-circular closed-loop tracks. Each of one or more mechanical compressors includes two pins that protrude from two sides of the mechanical compressor and engage one of the closed-loop tracks. The mechanical compressors are slidingly coupled to one or more vertical sliders configured to limit the movement of the mechanical compressors to a vertical translational pattern. A bag-coupler is configured to couple the bag to the mechanical compressor system in contact with the mechanical compressors. A motor or a manual crank is arranged to rotate the rotatable track supports, such that the pins move along the closed-loop tracks, causing vertical motion of the mechanical compressors along the one or more vertical sliders, which controls a volume of the bag. Other embodiments are also described.

A patient interface may include: a plenum chamber at least partly defining a patient interface chamber, a seal-forming structure constructed and arranged to form a seal with a region of the patient's face, at least one conduit, at least one conduit connector configured to pneumatically connect the at least one conduit to the plenum chamber to provide a flow of air at a therapeutic pressure to the patient interface chamber for breathing by the patient, and a positioning and stabilising structure to provide a force to hold the seal-forming structure on the patient's head, the positioning and stabilising structure comprising at least one tie, wherein the at least one conduit connector includes an anti-asphyxia valve configured to allow the patient to breath from ambient through their mouth in the absence of a flow of pressurised air.

Apparatus permit a delivery of a flow of breathable gas to a patient's airways. In one version, a coupler extension may include a seat portion to permit use of a mask with a nasal cannula. In some versions, the coupler extension is configured to conduct the flow of gas to prongs of a nasal cannula. The seat portion can receive and seal with a cushion of a respiratory mask and may have a sealing bevel to promote sealing between the cushion of the respiratory mask and a facial contact surface of a user. In some versions, a nasal interface may include naris pillows to seal with and conduct a flow of breathable gas into a nares of a user. Each naris pillow may include a nasal projection to conduct a further flow of gas. The nasal projection may extend within the naris beyond the seal of the naris pillow.

A device and method for adjusting a tidal breath delivered to a patient. The device includes a moving frame which is configured to move over a stationary frame that is nested within the moving frame itself. Disposed between the moving frame and the stationary frame is a compressible bellows which delivers a tidal breath to the patient each time the moving frame is passed over the stationary frame. The specific volume of the tidal breath that is delivered may adjusted according to the estimated weight of the patient, thereby preventing over inflation of the patient's lungs while undergoing treatment. To adjust the tidal breath volume, the user quickly changes the relative position of a slide selector which dictates the range of possible movement for the bellows to be compressed, thereby limiting the volume of air/oxygen which may be delivered by the bellows.

The Shared Manifold Ventilator uses low pressure breathing gas manifolds to interface directly with patients in a hospital ward, through solenoid valves in such a way that it achieves lower cost per patient ventilated than prior art methods while still allowing full control of the breathing cycle and oxygen concentration for each individual patient.

A reusable apparatus, such as a medical instrument or tool, is decontaminated by applying at least one of pressure waves, shockwaves, and ultrasound waves in a sufficient dosage to remove contamination but without adversely affecting the ability to reuse the apparatus.

The respirator comprises an air bag that is pressurized to provide air to a user, wherein the air bag is a tubular membrane (2) housed within a pressure chamber (1). Furthermore, the pressure chamber (1) comprises fluid inlets and outlets, the fluid pressurizing the tubular membrane (2) to provide air to a user, and protrusions (9) that pressurize the tubular membrane (2). It provides a respirator with reduced dimensions, number of parts, weight, and cost, as well as reusable after autoclave disinfection of the auto-inflatable bag as a standard element.

A process for monitoring a measuring system (110) for mechanical ventilation of a patient (20) is carried out while a fluid connection (40) is established between the patient (20) and a medical device (100). A gas sample is suctioned from the fluid connection (40) and is sent through a gas sensor fluid-guiding unit (52) to a gas sensor array (50). A time curve of the CO2 concentration and O2 concentration in the suctioned gas sample are determined. A concentration change curve of the change over time of the CO2 concentration and the O2 concentration are calculated. A search is made for a time period in which the two concentration change curves continuously have the same sign. Upon detecting such a time period it is checked whether a predefined first leak criterion is met. When this is the case, an indication of a leak (L) is detected.