Which of the following events occurs with prolonged cerebral edema?
A. Fluid leakage from damaged capillaries
B. Arterial dilation with increased capillary pressures
C. Lack of blood flow and O2 delivery
D. All of the above
ANS: D
Rationale: In cerebral edema, fluid leaks from damaged capillaries and accumulates in the brain. This increased fluid pressure often results in ischemia, which causes the arterioles to dilate, increasing the capillary pressure and producing further edema. A lack of O2 also makes the capillaries more permeable, allowing more fluid to escape into the extracellular compartment.
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