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A member asked:
How is the air in the drop down masks on commercial airlines different from the air in the cabin?
3 doctors weighed in across 2 answers
Higher O2: Drop down masks flow oxygen at higher concentration than cabin air. Same principle as when oxygen is given to a patient to breathe. Higher oxygen concentrations deliver more purified oxygen at higher concentrations than ambient air has, with less impurities also.
Answered 12/30/2011
6.1k views
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More oxygen: there is a higher concentration of oxygen in the air source in the mask.
Answered 11/12/2018
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