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  2. High altitude breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/High_altitude_breathing...

    High altitude breathing apparatus is used for unpressurised (ambient pressure) aeronautical and mountaineering activities where the oxygen content of the natural atmosphere is insufficient for maintaining physical activity, consciousness, or life, but the atmospheric pressure is sufficient that a pressure suit is not needed.

  3. Emergency oxygen system - Wikipedia

    en.wikipedia.org/wiki/Emergency_oxygen_system

    Most commercial aircraft that operate at high flight altitudes are pressurized at a maximum cabin altitude of approximately 8,000 feet. On most pressurized aircraft, if cabin pressurization is lost when the aircraft is flying at an altitude above 4,267 m (14,000 feet), compartments containing the oxygen masks will open automatically, either above or in front of the passenger and crew seats ...

  4. Oxygen mask - Wikipedia

    en.wikipedia.org/wiki/Oxygen_mask

    An oxygen mask is a mask that provides a method to transfer breathing oxygen gas from a storage tank to the lungs. Oxygen masks may cover only the nose and mouth (oral nasal mask) or the entire face (full-face mask). They may be made of plastic, silicone, or rubber. In certain circumstances, oxygen may be delivered via a nasal cannula instead ...

  5. Breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Breathing_apparatus

    People can become acclimatised to an altitude of 5,200 to 5,500 metres (17,000 to 18,000 ft) if they remain at high altitude for long enough, but for high altitude rescue work, rescue teams must be rapidly deployed, and the time necessary to acclimatise is not available, making oxygen breathing equipment necessary above approximately 3,700 ...

  6. Glossary of breathing apparatus terminology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_breathing...

    See: venturi mask air-filtering respirator An air-filtering respirator is a breathing apparatus which removes particulates from the ambient air by passing it through a filter. air-purifying respirator An air-purifying respirator is a respirator which uses a filter, cartridge, or canister to remove specific air contaminants by passing ambient air through the air-purifying component ...

  7. Armstrong limit - Wikipedia

    en.wikipedia.org/wiki/Armstrong_limit

    At 11,900 m (39,000 ft), breathing pure oxygen through an unsealed face mask, one is breathing the same partial pressure of oxygen as one would experience with regular air at around 3,600 m (11,800 ft) above sea level [citation needed]. At higher altitudes, oxygen must be delivered through a sealed mask with increased pressure, to maintain a ...

  8. Hypobaric chamber - Wikipedia

    en.wikipedia.org/wiki/Hypobaric_chamber

    Hypobaric chamber at the Biopol'H, in Catalonia (), used with patients and athletes who need treatment or training with reduced atmospheric pressure. A hypobaric chamber, or altitude chamber, is a chamber used during aerospace or high terrestrial altitude research or training to simulate the effects of high altitude on the human body, especially hypoxia (low oxygen) and hypobaria (low ambient ...

  9. Pressure suit - Wikipedia

    en.wikipedia.org/wiki/Pressure_suit

    A pressure suit is a protective suit worn by high-altitude pilots who may fly at altitudes where the air pressure is too low for an unprotected person to survive, even when breathing pure oxygen at positive pressure. Such suits may be either full-pressure (e.g., a space suit) or partial-pressure (as used by aircrew). Partial-pressure suits work ...

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