An abnormal ventilation-perfusion ratio is a common cause of hypoxemia.

Question

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Hypoxemia results from problems with one or more of the major mechanisms of oxygenation.
Hypoxemia results from problems with one or more of the major mechanisms of oxygenation.
1. Oxygen delivery to the alveoli
a. Oxygen content of the inspired air (FiO₂)
b. Ventilation of the alveoli
2. Diffusion of oxygen from the alveoli into the blood
a. Balance between alveolar ventilation and perfusion ( / match)
b. Diffusion of oxygen across the alveolocapillary barrier
3. Perfusion of pulmonary capillaries

An Abnormal Ventilation-Perfusion Ratio Is a Common Cause of Hypoxemia