USMLE Question of the Week

How to Understand Shock Physiology in an Infant

In Episode 34 of Med School Question of the Week for USMLE, Faustine Ramirez, MedSchoolCoach expert tutor, answers this medical school question:

A 10-month-old boy is brought to the emergency department with one day of fever, irritability, and poor feeding. Temperature is 40 C, heart rate is 190/min, respiratory rate is 60/min, and blood pressure is 60/30. Extremities are warm, pulses are bounding, capillary refill is 4 seconds, and mucous membranes are dry. Blood cultures grow S. Aureus. Which of the following is the most likely mechanism for these findings?

  • Increased hydrostatic pressure
  • Decreased systemic vascular resistance
  • Increased pulmonary vascular resistance
  • Decreased cardiac output
  • Increased pulmonary capillary wedge pressure
  • Decreased oncotic pressure

Watch to find out!

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