Which inhalational agent is a potent cerebral vasodilator and can increase intracranial pressure?

Which inhalational agent is a potent cerebral vasodilator and can increase intracranial pressure?

• A. Isoflurane
• B. Desflurane
• C. Sevoflurane
• D. Nitrous oxide

Answer: (A)

Inhaled anesthetics affect the brain by dilating cerebral vessels, which raises cerebral blood flow and can increase intracranial pressure, especially if ventilation and CO2 levels aren’t tightly controlled. Isoflurane is known for producing strong cerebral vasodilation, so at typical surgical concentrations it can significantly raise intracranial pressure. That makes it the best choice for explaining a potent vasodilator effect that can worsen ICP. Desflurane and sevoflurane also cause cerebral vasodilation and can increase ICP, but their vasodilatory effect is less pronounced than that of isoflurane in this context. Nitrous oxide increases intracranial pressure as well, primarily through cerebral vasodilation and by expanding gas spaces, but it’s not the classic example of the strongest cerebral vasodilator among the volatile anesthetics.

Inhaled anesthetics affect the brain by dilating cerebral vessels, which raises cerebral blood flow and can increase intracranial pressure, especially if ventilation and CO2 levels aren’t tightly controlled. Isoflurane is known for producing strong cerebral vasodilation, so at typical surgical concentrations it can significantly raise intracranial pressure. That makes it the best choice for explaining a potent vasodilator effect that can worsen ICP.

Desflurane and sevoflurane also cause cerebral vasodilation and can increase ICP, but their vasodilatory effect is less pronounced than that of isoflurane in this context. Nitrous oxide increases intracranial pressure as well, primarily through cerebral vasodilation and by expanding gas spaces, but it’s not the classic example of the strongest cerebral vasodilator among the volatile anesthetics.