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Review Question - QID 109861

Oxygen Deprivation Hypoxemia Causes of Hypoxemia (↓ PaO2) QID: 109861 (M1.PL.17.4869)
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QID 109861 (Type "109861" in App Search)
A 72-year-old obese man presents as a new patient to his primary care physician because he has been feeling tired and short of breath after recently moving to Denver. He is a former 50 pack-year smoker and has previously had deep venous thrombosis. Furthermore, he previously had a lobe of the lung removed due to lung cancer. Finally, he has a family history of a progressive restrictive lung disease. Laboratory values are obtained as follows:

Oxygen tension in inspired air = 130 mmHg
Alveolar carbon dioxide tension = 48 mmHg
Arterial oxygen tension = 58 mmHg
Respiratory exchange ratio = 0.80
Respiratory rate = 20/min
Tidal volume = 500 mL

Which of the following mechanisms is consistent with these values?
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