A patient with a head injury has a mean arterial pressure of 70 mm Hg and an intracranial pressure of 20 mm Hg. Which cerebral perfusion pressure would the nurse document for this patient?
1. 50 mm Hg
2. 90 mm Hg
3. 70/40 mm Hg
4. 40/70 mm Hg
Answer: 1
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