Which agent among the following reduces CSF production?

Which agent among the following reduces CSF production?

• A. Furosemide
• B. Halothane
• C. Etomidate
• D. Hypothermia

Answer: (C)

The main concept is that CSF production is driven by cerebral perfusion and metabolic activity of the brain. When a drug lowers brain metabolism, it tends to reduce cerebral blood flow to a degree and slow the secretory activity of the choroid plexus, leading to less CSF formation and lower intracranial pressure. Etomidate decreases the cerebral metabolic rate for oxygen (CMRO2) with relatively preserved cerebral autoregulation and minimal hemodynamic swings. That drop in brain metabolism translates into reduced cerebral blood flow and diminished choroid plexus secretion, which lowers CSF production. Among the options, this direct metabolic-suppressive effect on the brain makes etomidate the best choice for reducing CSF production.

The main concept is that CSF production is driven by cerebral perfusion and metabolic activity of the brain. When a drug lowers brain metabolism, it tends to reduce cerebral blood flow to a degree and slow the secretory activity of the choroid plexus, leading to less CSF formation and lower intracranial pressure.

Etomidate decreases the cerebral metabolic rate for oxygen (CMRO2) with relatively preserved cerebral autoregulation and minimal hemodynamic swings. That drop in brain metabolism translates into reduced cerebral blood flow and diminished choroid plexus secretion, which lowers CSF production. Among the options, this direct metabolic-suppressive effect on the brain makes etomidate the best choice for reducing CSF production.