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preoxygenation

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noun pre·ox·y·gen·ation \-ˌäk-si-jə-ˈnā-shən, -äk-ˌsij-ə-\

Medical Definition of preoxygenation

  1. :  inhalation of large quantities of essentially pure oxygen usually as a prelude to some activity or medical procedure in which it is desirable to minimize nitrogen and maximize oxygen in the blood and tissues

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