Shock 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 24-year-old female presents to the emergency department with shortness of breath. She is accompanied by her college-roommate, who reports she found the patient wheezing in her room. The patient is unable to provide additional history due to her labored work of breathing. Temperature is 37.0°C (98.6°F), pulse is 115 min, respirations are 28/min, blood pressure is 90/60 mmHg, and O₂ saturation is 90% on room air. On physical exam, the patient has diffuse wheezing throughout the lung fields as well as a diffuse erythematous macular rash over the chest wall. The posterior pharynx is not visualized due to severe lip and tongue swelling. Which of the following is the most likely cause of this patient’s clinical presentation?

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Paraneoplastic serotonin secretion

Bacterial histidine decarboxylase conversion of histidine to histamine

Bacteremia due to a Gram-negative diplococci

Systemic release of histamine and bradykinin

C1 esterase inhibitor deficiency