How long does flight deck oxygen last?

Generally used on large aircraft in case of an emergency to provide a 10 minute supply of oxygen. Activated by a lanyard on the oxygen mask, as the user pulls the mask to their face, a chemical reaction with sodium chlorate is triggered. Once this system is activated, it must burn out, requiring replacement.



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Oxygen production cannot be shut off once a mask is pulled, and oxygen production typically lasts at least 15 minutes, sufficient for the plane to descend to a safe altitude for breathing without supplemental oxygen.

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If oxygen deficiency continues over a long enough period of time, it can cause unconsciousness, permanent brain damage or even death. So, in order to keep everyone maintained with enough oxygen, the masks fall down and provide a personal flow.

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Q: What medical equipment do airlines carry for emergencies? -- Kevin H., Tracy, Minn. A: There is a basic first-aid kit, an enhanced first-aid kit and an automatic defibrillator on board most airline flights. Supplemental oxygen is also available.

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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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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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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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