Patients with multiple rib fractures may develop significant hypoxia because of a ventilation/perfusion mismatch, which occurs when:
A. vascular disruption severely inhibits the adequate exchange of gases in the lungs.
B. the circulatory system is intact but the amount of available oxygen is diminished.
C. alveolar surface area is greatly increased and the pulmonary capillaries are dilated.
Answer: A. vascular disruption severely inhibits the adequate exchange of gases in the lungs.
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