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Q768

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1. A three-year-old child is brought to the emergency room after inhaling a peanut. The peanut has lodged in the right mainstem bronchus, largely occluding it. The child is cyanotic, and non-invasive transcutaneous monitoring reveals a PO2 of 60 mm Hg. Which of the following mechanisms best accounts for the child's hypoxemia?
A.
B.
C.
D.
E.


 

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