In ICP management, which of the following should be given to support brain oxygenation?

• A. Administer supplemental oxygen
• B. Oxygen withheld
• C. Administer high-flow air only
• D. Do not provide oxygen

Answer: (A)

Preventing hypoxemia is essential to protect brain tissue when ICP is a concern. The brain relies on a steady delivery of oxygen, and when arterial oxygen is low, cerebral ischemia can worsen injury and complicate management. Providing supplemental oxygen increases the fraction of inspired oxygen, raises PaO2 and overall oxygen content in the blood, and helps ensure that brain tissue receives the oxygen it needs. Keeping oxygen saturation in the normal range (roughly in the mid-to-high 90s) supports cerebral oxygen delivery and helps minimize secondary brain injury.

Oxygen withheld would allow hypoxemia to develop, which is harmful for brain tissue. Relying on high-flow air would still expose the patient to only about 21% oxygen, which may be insufficient to correct low oxygen levels. Not providing oxygen at all would likewise worsen hypoxemia and brain oxygenation.