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  2. High altitude breathing apparatus - Wikipedia

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

    At very high altitude, from 3,500 to 5,500 metres (11,500 to 18,000 ft) arterial oxygen saturation falls below 90% and arterial P O 2 is reduced to the extent that extreme hypoxemia may occur during exercise and sleep, and if high altitude pulmonary edema occurs. In this range severe altitude illness is common. [2]

  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. Effects of high altitude on humans - Wikipedia

    en.wikipedia.org/wiki/Effects_of_high_altitude...

    At high altitude, in the short term, the lack of oxygen is sensed by the carotid bodies, which causes an increase in the breathing depth and rate . However, hyperpnea also causes the adverse effect of respiratory alkalosis , inhibiting the respiratory center from enhancing the respiratory rate as much as would be required.

  5. Oxygen tank - Wikipedia

    en.wikipedia.org/wiki/Oxygen_tank

    medical breathing (oxygen therapy) at medical facilities and at home (high pressure cylinder) breathing at altitude in aviation, either in a decompression emergency, or constantly (as in unpressurized aircraft), usually in high pressure cylinders; oxygen first aid sets, in small portable high pressure cylinders [1]

  6. Breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Breathing_apparatus

    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 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 by ...

  7. Nepal government begging Everest climbers to return used ...

    www.aol.com/news/nepal-government-begging...

    As hospitals deal with an influx in cases, oxygen supply is drastically reduced forcing the Nepal Mountaineering Association (NMA) to urge climbers of Mount Everest to return used oxygen canisters ...

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