Which of the following is true to the immediate postoperative period in a young patient with previously normal lungs having upper abdominal surgery ?

A. Arterial oxygen tension will typically be reduced by an average of 10 mm Hg when breathing room air

B. Arterial oxygen tension will normalize after 15 minutes

C. Diffusion hypoxia is the major determinant of arterial hypoxaemia

D. The CXR will typically reveal no abnormalities

Correct Answer: Arterial oxygen tension will typically be reduced by an average of 10 mm Hg when breathing room air

Description: None

Category: Anaesthesia

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