What is the normal intracranial pressure (ICP) range the nurse tries to maintain?

Rationale: A. 5–15 mm Hg – Normal intracranial pressure (ICP) in adults is typically 5–15 mm Hg. Maintaining ICP within this range ensures adequate cerebral perfusion while preventing brain injury from elevated pressure. B. 5–20 mm Hg – Values above 15 mm Hg are considered elevated and may indicate intracranial hypertension, which can compromise cerebral perfusion. C. 0–15 mm Hg – ICP rarely drops to 0 mm Hg in a normal adult and the lower boundary is usually considered 5 mm Hg. D. 0–20 mm Hg – Pressures above 15 mm Hg are considered abnormal and may require intervention.