Which statement best describes the physiologic status when intracranial pressure is 12 mm Hg?

Which statement best describes the physiologic status when intracranial pressure is 12 mm Hg?

• A. The body will stop functioning.
• B. Brain tissue will rapidly swell.
• C. The body will function normally.
• D. Vital signs will be unstable.

Answer: (C)

ICP of 12 mm Hg is within the normal range for adults (roughly 0–15 mm Hg). When pressure stays in this range, cerebral perfusion pressure (CPP) is typically adequate because CPP equals mean arterial pressure minus ICP. With normal ICP, brain tissue isn’t compressed enough to impair blood flow, so brain function can be maintained and vital signs are not inherently unstable due to ICP alone. This level does not cause rapid swelling or indicate that the body will stop functioning; those outcomes would be linked to higher, sustained ICP or other injuries.

ICP of 12 mm Hg is within the normal range for adults (roughly 0–15 mm Hg). When pressure stays in this range, cerebral perfusion pressure (CPP) is typically adequate because CPP equals mean arterial pressure minus ICP. With normal ICP, brain tissue isn’t compressed enough to impair blood flow, so brain function can be maintained and vital signs are not inherently unstable due to ICP alone. This level does not cause rapid swelling or indicate that the body will stop functioning; those outcomes would be linked to higher, sustained ICP or other injuries.