Which term represents elevated pressure in the skull that reduces brain perfusion?

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Study for the CIEMT Trauma and Assessment Exam. Utilize comprehensive flashcards and multiple choice questions with detailed hints and explanations. Enhance your preparedness and confidence for your upcoming exam!

Multiple Choice

Which term represents elevated pressure in the skull that reduces brain perfusion?

Explanation:
Elevated intracranial pressure is the pressure build-up inside the skull that directly reduces the brain’s blood supply. The brain relies on a pressure gradient to receive blood, and the cerebral perfusion pressure (CPP) is the difference between mean arterial pressure and intracranial pressure (CPP = MAP − ICP). When ICP rises, that gradient narrows, CPP falls, and brain tissue can become ischemic. Normal ICP is about 0–15 mmHg; values above 20 mmHg are concerning and require intervention. Injuries or conditions that can raise ICP include brain swelling, hematomas, and excess CSF. The other terms describe different concepts: a basilar skull fracture is a fracture at the base of the skull; raccoon eyes are periorbital bruising associated with facial or skull injuries; Cushing triad (high blood pressure, slow heart rate, irregular breathing) is a sign that ICP is severely elevated, not the label for the pressure itself.

Elevated intracranial pressure is the pressure build-up inside the skull that directly reduces the brain’s blood supply. The brain relies on a pressure gradient to receive blood, and the cerebral perfusion pressure (CPP) is the difference between mean arterial pressure and intracranial pressure (CPP = MAP − ICP). When ICP rises, that gradient narrows, CPP falls, and brain tissue can become ischemic.

Normal ICP is about 0–15 mmHg; values above 20 mmHg are concerning and require intervention. Injuries or conditions that can raise ICP include brain swelling, hematomas, and excess CSF.

The other terms describe different concepts: a basilar skull fracture is a fracture at the base of the skull; raccoon eyes are periorbital bruising associated with facial or skull injuries; Cushing triad (high blood pressure, slow heart rate, irregular breathing) is a sign that ICP is severely elevated, not the label for the pressure itself.

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