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