A 33-year-old pilot is transported to the emergency department after she was involved in a motor vehicle collision. She is conscious but confused. She has no history of serious illness and takes no medications. Physical examination shows numerous lacerations and ecchymoses over the face, trunk, and upper extremities. The lower extremities are cool to the touch. There is continued bleeding despite the application of firm pressure to the sites of injury. X-rays show pelvic and left femoral shaft fractures. Which of the following findings are most likely present in this patient?

Question

Quizplus · Accepted Answer

Eductional Objective: Low blood pressure results in decreased arterial distension and reduced firing of aortic and carotid baroreceptors. This leads to an increase in sympathetic outflow and decrease in parasympathetic outflow, stimulating vasoconstriction and increased heart rate and contractility in order to help maintain blood pressure. Hypovolemia reduces atrial stretch, causing decreased atrial natriuretic peptide secretion.

A 33-Year-Old Pilot Is Transported to the Emergency Department After