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2. Resuscitator - Wikipedia

   en.wikipedia.org/wiki/Resuscitator

   A resuscitator is a device using positive pressure to inflate the lungs of an unconscious person who is not breathing, in order to keep them oxygenated and alive. [citation needed] There are three basic types: a manual version (also known as a bag valve mask) consisting of a mask and a large hand-squeezed plastic bulb using ambient air, or with supplemental oxygen from a high-pressure tank.

3. Bag valve mask - Wikipedia

   en.wikipedia.org/wiki/Bag_valve_mask

   Bag valve mask. Part 1 is the flexible mask to seal over the patients face, part 2 has a filter and valve to prevent backflow into the bag (prevents patient deprivation and bag contamination) and part 3 is the soft bag element which is squeezed to expel air to the patient

4. Self-contained breathing apparatus - Wikipedia

   en.wikipedia.org/wiki/Self-contained_breathing...

   An open circuit SCBA typically has three main components: a high-pressure gas storage cylinder, (e.g., 2,216 to 5,500 psi (15,280 to 37,920 kPa), about 150 to 374 atmospheres), a pressure regulator, and a respiratory interface, which may be a mouthpiece, half mask or full-face mask, assembled and mounted on a framed carrying harness. [2]

5. Face masks with valves don’t stop COVID-19 from spreading - AOL

   www.aol.com/face-masks-valves-don-t-160000078.html

   Mask valves might make you breathe a little easier, but when it comes to fighting COVID, wearing one is a bad move. When shopping for face masks to prevent the spread of COVID-19, you don’t need ...

6. Rebreather - Wikipedia

   en.wikipedia.org/wiki/Rebreather

   5 Automatic make-up valve; ... Anaesthetic machines can be configured as rebreathers to provide ... This is a particular issue around the edge of a full-face mask ...

7. Dräger (company) - Wikipedia

   en.wikipedia.org/wiki/Dräger_(company)

   The standard unit provides a simple dive/surface valve (DSV) with mouthpiece, but an optional DSV connects to the Dräger Panorama full-face mask using the standard Dräger P-port connection system which is also used for the connections between the breathing hoses and counterlungs, and between the counterlungs and scrubber canister. The back ...