Revalida Kinesiología UChile Practice Questions - Examen De Reválida De Título De Kinesiólogo(a) (Universidad De Chile) Exam

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What is the primary physiological mechanism of High-Flow Nasal Cannula (CNAF / HFNC) oxygen therapy in acute hypoxemic respiratory failure?
Correct Answer:
Delivers heated, fully humidified gas up to 60 L/min, flushes anatomical nasopharyngeal dead space (reducing work of breathing), matches patient peak inspiratory flow, and generates a modest positive airway pressure (2–5 cmH2O)

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