Approach to acute kidney injury 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 19-year-old man presents to clinic with swelling around his eyes and dark-colored urine for three days. He reports a sore throat two weeks ago for which he did not seek treatment. He has no fever, rash, abdominal pain, or joint swelling. He has no significant past medical history and takes no medication. Temperature is 36.8°C (98.2°F), blood pressure is 155/95 mmHg, heart rate is 84 beats per minute, and respiratory rate is 16 breaths per minute. Periorbital edema is present bilaterally. Cardiopulmonary examination is normal. No rash is present, and joint examination is within normal limits. No costovertebral angle tenderness is noted. Laboratory results are shown below. Which of the following is the most likely diagnosis? 

 Laboratory Test     Result     Reference range    
 Serum creatinine     2.1 mg/dL (baseline 0.7 mg/dL 6 months ago)     0.6-1.2 mg/dL   
 Blood urea nitrogen (BUN)     38 mg/dL     7-18 mg/dL   
 C3 complement level     Low     Normal   
 C4 complement level     Normal     Normal   
 Urinalysis     Mild proteinuria, hematuria with red blood cell (RBC) casts     Negative   
 Anti-streptolysin O (ASO) titer     Elevated     Normal    

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