What is the purpose of selective cerebral perfusion during CPB?

• A. To deliver targeted cerebral blood flow and protect brain during circulatory arrest.
• B. To increase systemic blood pressure.
• C. To reduce liver perfusion.
• D. To decrease oxygen delivery to brain.

Answer: (A)

While the heart and body are on cardiopulmonary bypass, surgeons may need to stop systemic circulation to repair the aorta. The brain is highly sensitive to lack of blood and oxygen, so selective cerebral perfusion delivers oxygenated blood directly to the brain through dedicated arterial inflow. This provides a targeted cerebral blood flow and maintains brain oxygen delivery during the period of circulatory arrest, helping protect neural tissue from ischemic injury. It’s not about raising systemic blood pressure or reducing blood flow to other organs like the liver; and it also isn’t about lowering oxygen delivery to the brain—the goal is the opposite: to keep the brain well perfused and oxygenated during arrest.