The most rapid means of decreasing cerebral oedema is via osmotherapy. Mannitol is used clinically to reduce acute raised intracranial pressure by drawing water out of the brain by an osmotic gradient and to decrease blood viscosity.
Mannitol is thought to decrease brain volume by decreasing overall water content, to reduce blood volume by vasoconstriction, and to reduce CSF volume by decreasing water content.
Which of the following statements about mannitol is FALSE?
Extra info: Mannitol stimulates water flow from intracellular towards extracellular space by increasing osmolality.