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 55-year-old woman with a history of type 2 diabetes and hypertension is brought to the emergency department for severe shortness of breath. She has been experiencing a worsening cough and fever over the past 5 days. Temperature is 39.3°C (102.7°F), heart rate is 110/min, blood pressure is 89/54 mm Hg, respiratory rate is 28/min, and oxygen saturation is 89% on 60% FiO2 via a non-rebreather mask. Physical examination reveals bilateral crackles on lung auscultation. There is no jugular venous distension and no lower extremity edema. Chest X-ray shows diffuse bilateral infiltrates. Results from the laboratory evaluation are shown below. A bedside echocardiogram reveals normal left ventricular systolic function and preserved ejection fraction. Arterial blood gas and FiO2 are used to calculate a PaO2/FiO2 ratio ≤ 300. Arterial blood gas analysis is most likely to show which of the following findings in this patient? 

 Complete Blood Count    
 Hemoglobin (Hb)     12.5 g/dL   
 White Blood Cells (WBC)     17,000/µL   
 Platelets     400,000/µL   
 General Chemistry    
 Sodium     140 mEq/L    
 Potassium     4.2 mEq/L    
 Chloride     102 mEq/L    
 CRP     40 mg/L    

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