Crucial Exams

BCEN CFRN Practice Question

A 45-year-old man with a severe traumatic brain injury is intubated and ventilated for rotor-wing transport to a level I trauma center. Shortly after lift-off and climb through 2,000 ft AGL, his pupillary response slows and his intracranial pressure monitor rises from 18 mm Hg to 30 mm Hg despite unchanged ventilator settings. Which factor related to the flight environment is the most likely cause of this acute increase in ICP?

  • Positive G-forces during climb impeding cerebral venous outflow

  • Hyperventilation failure leading to hypercarbia and cerebral vasodilation

  • Lower barometric pressure at altitude causing expansion of trapped intracranial gas

  • Rotor-blade vibration and cabin noise stimulating sympathetic discharge

BCEN CFRN
General Principles of Flight Transport Nursing Practice
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