How high can you fly without supplemental oxygen?

Importance to Members Sure, everyone knows that you have to use supplemental oxygen if you fly more than 30 minutes at cabin pressure altitudes of 12,500 feet or higher. And that at cabin altitudes above 14,000 feet pilots must use oxygen at all times.



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For operations conducted under Parts 121 and 135, the flight crew must use oxygen when cabin altitudes are above 10,000 up to 12,000 feet after 30 minutes and at all times when above 12,000 feet. The general aviation pilot flying an unpressurized airplane will not normally operate above 25,000 feet.

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For Part 91 General Aviation operations the required flight crew must use supplemental oxygen for any portion of the flight that exceeds 30 minutes above a cabin pressure altitude of 12,500 feet mean sea level (MSL) up to and including 14,000 feet (MSL).

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In aeronautics, hypoxia typically results from a decompression or lack of pressurisation of the aircraft cabin. Hypoxia occurs within a few minutes if the cabin pressure altitude rises to between 5,000-6,000 m (about 16,000 - 20,000 ft).

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For best protection, you are encouraged to use supplemental oxygen above 10,000 feet MSL. At night, because vision is particularly sensitive to diminished oxygen, a prudent rule is to use supplemental oxygen when flying above 6,000 feet MSL. So, when you fly at high altitudes, supplemental oxygen is the only solution.

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Oxygen masks release whenever there's a drop in cabin pressure. Sometimes the flight crew might initiate the release. However, it usually triggers automatically when the cabin altitude gets to 14,000 feet.

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Without oxygen, you will quickly feel drowsy and even euphoric, a phenomenon known as hypoxia, but as time passes, continued lack of oxygen to the brain will lead to blackouts, passing out, and possibly even death.

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Choose a seat in the middle of the plane. As the air circulates across the rows and not up and down the plane, some experts believe the worst air is in the front or the back of the plane. Stay well hydrated by drinking lots of fluids (water or fruit juice) and avoiding caffeine and alcohol, which will dehydrate you.

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For most passengers, even those with respiratory disease, air travel is safe and comfortable. Some patients with COPD may be at risk but, with screening, these patients can be identified and most can travel safely with supplemental oxygen.

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Oxygen masks release whenever there's a drop in cabin pressure. Sometimes the flight crew might initiate the release. However, it usually triggers automatically when the cabin altitude gets to 14,000 feet.

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When you fly on an airplane, the flight attendant instructs you to “put your oxygen mask on first,” before helping others. Why is this an important rule for ensuring survival? Because if you run out of oxygen yourself, you can't help anyone else with their oxygen mask.

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Others will allow you to bring your own Federal Aviation Administration (FAA) approved portable oxygen concentrator (POC) onto the flight, but will often specify the type of device you can use. You should speak to your airline as early as possible to make sure that they are able to accommodate your needs.

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Answer: No. The cabin is pressurized between 6,000 and 8,000 feet on long flights. Adding supplemental oxygen is not necessary, because the percentage of oxygen is the same as being on the ground at those altitudes.

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Treatment of Hypoxia If hypoxia is suspected in yourself or others on board an aircraft, follow these simple steps: Administer supplemental oxygen (don your oxygen mask) Check your equipment for proper operation. Ensure the regulator is turned on.

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Resting Pulse Oximetry
Values >95% on room air suggest that inflight hypoxemia is unlikely and that further evaluation is likely not necessary. Patients with saturations <92% on room air at rest should receive supplemental oxygen inflight, because they are at high risk of hypoxemia at altitude.

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After about 20 minutes without supplemental oxygen, you will be pronounced dead. By the time you get to 35,000 feet, EPT drops to 30 to 60 seconds and it falls to nine to 15 seconds at 45,000.

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Airlines are not required to provide oxygen service and many do not. Passengers may carry portable oxygen concentrators (POCs). See separate entry in this table.

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