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42585 Anaesthesia

A 61-year-old alcoholic man presents with severe epigastric pain radiating to his back. His amylase and lipase are elevated, and he is diagnosed with acute pancreatitis. Over the first 48 hours, he is determined to have 6 Ranson’s criteria, including a PaO2 less than 60 mm Hg. His chest x-ray reveals bilateral pulmonary infiltrates, and his wedge pressure is low. Which of the following criteria must be met to make a diagnosis of adult respiratory distress syndrome (ARDS)?

AHypoxemia defined as a PaO2 /FiO2 ratio of less than 200
BHypoxemia defined as a PaO2 of less than 60 mm Hg
CA pulmonary capillary wedge pressure greater than 18 mm Hg
DLack of improvement in oxygenation with administration of a test dose of furosemide
Anaesthesia
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