The 5 pathophysiologic mechanisms (VQ mismatch, shunting, impaired diffusion, low FiO2, and hypoventilation) to hypoxemia is not a practical approach to a patient with hypoxemia.

In this video, we discussed a practical approach that can be used at the bedside which incorporates the lung exam and response to oxygen therapy.

These videos are purely for education.

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Image of petechial rash from James Heilman, MD, CC BYSA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons