Acute respiratory distress syndrome Quiz: Ace Your Exams

Get ready to dominate your medical and nursing exams by using our dynamic quizzes to elevate your knowledge and increase your confidence. Whether you're gearing up for the USMLE®, COMLEX®, or your next in-class assessment, Osmosis quizzes tackle key topics in pathology, diagnostics, and treatment approaches. By honing in on clinical readiness and decision-making, we make sure the knowledge you gain empowers you both in the classroom and in real-world practice. Jump in and supercharge your exam prep!

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A 45-year-old man with a history of alcohol abuse is admitted for acute pancreatitis, and he becomes acutely short of breath on day two of his hospitalization. His temperature is 37°C (98.6°F), pulse is 108/min, respirations are 26/min, blood pressure is 110/94 mmHg, and oxygen saturation is 87% on room air. He is given supplemental O2 via non-invasive ventilation, but he later requires intubation due to persistent hypoxemia and concern for airway compromise. Chest x-ray demonstrates new bilateral opacities. His arterial blood gas on 100% FiO2 shows the following:  

 
Laboratory value  Result
Blood Gases, Serum 
pH  7.51 
 PCO2  23 mmHg 
 PO2  54 mm Hg 
Cardiac Enzymes, Serum 
Brain Natriuretic Peptide  (BNP)  <100 ng/dL (N = <100) 
 Troponin  <.03 ng/dL 
Which of the following physiologic parameters best confirms the diagnosis in this patient?

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