Which value is considered normal for intracranial pressure (ICP)?

Which value is considered normal for intracranial pressure (ICP)?

• A. 0 to 15 mm Hg
• B. 25 mm Hg
• C. 35 to 45 mm Hg
• D. 120/80 mm Hg

Answer: (A)

Normal intracranial pressure is the pressure inside the skull that supports adequate cerebral perfusion, and it typically stays around 0 to 15 mm Hg. Values within this range mean the brain is receiving blood flow without undue pressure. When ICP rises, as seen with values like 25 mm Hg or higher, brain tissue can become compressed and cerebral perfusion can drop, leading to potential injury. Extremely high pressures (35–45 mm Hg) indicate severe intracranial hypertension and require urgent management. The option 120/80 mm Hg is a blood pressure reading, not ICP, so it doesn’t describe the pressure inside the skull.

Normal intracranial pressure is the pressure inside the skull that supports adequate cerebral perfusion, and it typically stays around 0 to 15 mm Hg. Values within this range mean the brain is receiving blood flow without undue pressure. When ICP rises, as seen with values like 25 mm Hg or higher, brain tissue can become compressed and cerebral perfusion can drop, leading to potential injury. Extremely high pressures (35–45 mm Hg) indicate severe intracranial hypertension and require urgent management. The option 120/80 mm Hg is a blood pressure reading, not ICP, so it doesn’t describe the pressure inside the skull.