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Evaluation of ICP Changes

Elevated ICP will result in a decrease in the cerebral perfusion pressure, and ultimately in cerebral perfusion. Therefore, controlling ICP from increasing too much is critical to prevent brain ischemia.

With TCD, qualitative assessment of ICP changes can be made. Since elevated ICP increases significantly the distal resistance, typically the effect on the TCD signals will be reduced velocities, coupled with a sharp increase in the pulsatility indices.

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