A patient admitted to the neurological intensive care unit with a brain stem herniation is exhibiting an altered level of consciousness
The nurse has determined that the patient's mean arterial pressure (MAP) is 60 with an intracranial pressure (ICP) reading of 5 mm Hg. The nurse would be correct in determining the cerebral perfusion pressure (CPP) as which of the following values?
A) Normal
B) High
C) Low
D) Compensating
Ans: C
Feedback: The CPP is 55 mm Hg, which is considered low. The normal CPP is 70 to 100 mm Hg. Patients with a CPP of less than 50 mm Hg experience irreversible neurologic damage. A lower than normal CPP indicates that the cardiac output is insufficient to maintain adequate cerebral perfusion.
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