Why do they give oxygen on a plane?

Typically, the airplane pressurizes to counteract the drop in air pressure at high altitudes. However, oxygen masks provide redundancy. If anything happens to the pressurization system, or the plane experiences any difficulties while in flight, oxygen masks will deploy.



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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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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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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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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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The primary problem is low oxygen, says Professor Frances Ashcroft, a physiologist at Oxford University. Low pressure would cause little more than discomfort in the ears and eyes, but the associated drop in oxygen levels makes people pass out if they do not put their oxygen masks on within about 15 seconds.

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Traveling by airplane exposes people to decreased air pressure and lower than normal oxygen levels. For most people, these changes are not noticeable. However, for patients with certain underlying lung conditions, small atmospheric changes can have significant and potentially severe effects.

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The only oxygen equipment allowed on an airplane is the portable oxygen concentrator (POC). If you need oxygen in flight, you must take a portable oxygen concentrator with you, and , you must let your airline know ahead of time. They may require a doctor's letter to verify the need for the POC on the plane.

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The air on a plane contains less oxygen than the air we normally breathe in. This leads to lower levels of oxygen in the blood. If you do not have a lung condition, the drop in oxygen is not enough that you would feel the difference.

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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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Airlines are not required to provide oxygen service and many do not. Passengers may carry portable oxygen concentrators (POCs).

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The inner pane basically safeguards the load from the passengers during flight. When both the outer and middle panes break, then all the pressurization in the airplane would escape leading to decompression in the passenger cabin. A plane is pressurized for passengers' comfort as it climbs to a higher altitude.

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Airlines “pressurize” the air in the cabin, but not to sea-level pressures, so there's still less oxygen getting to your body when you fly, which can make you feel drained or even short of breath. The potential dehydration factor and sitting for long periods of time doesn't help.

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The oxygen masks provided to passengers and cabin crew are designed for short-term use (generally up to 20 minutes) and are not intended for extended periods. Passengers only need to use the masks until the aircraft reaches a safe altitude or until the emergency situation has been resolved.

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