11. A 69 year-old woman is admitted with a severe left lower lobe pneumo-nia. Measurements in the intensive care unit showed her shunt fractionto be 20%. Assuming that she had a normal shunt fraction prior toadmission, which of the following would you expect to see as a result ofthe change in her shunt fraction?A. Decreased alveolar Po2B. Increased arterial Pco2C. Increased physiologic dead spaceD. No change in the alveolar-arterial oxygen differenceE. Suboptimal response to supplemental oxygen administration

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