preoxygenation
C2CEFR level
90/100Rarity: very rare
TechnicalRegister
Administration of high-concentration oxygen before induction to build an alveolar reservoir and prolong safe apnoea.
Meticulous preoxygenation to an end-tidal oxygen of ninety per cent bought precious time during the difficult airway.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
Get words like preoxygenation on your lock screen, a few a day, with review that makes them stick.
Download on the App Store Lexfall puts a new word on your home and lock screen through widgets, so you learn without opening an app. Free to download. After a free trial, a subscription unlocks every field. Built for iPhone, iOS 15.1 or later.
On a computer?Scan with your iPhone camera.