Respiratory disorders · Physiology

A decreased PaO2 with normal or low PaCO2 is commonly seen in:

  1. Hypoventilation
  2. Diffusion impairment
  3. Opioid overdose
  4. Neuromuscular paralysis
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Correct answer: Diffusion impairment

Diffusion impairment affects oxygen transfer more than carbon dioxide. This results in hypoxemia without hypercapnia.

Difficulty: Medium Question 7 of 20

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