[Osmolality and ion concentration in the cerebrospinal fluid and blood serum in epilepsy and ischemic stroke].

A sharp (16.4%) increase of blood serum osmolality very close to the critical values was found in acute period of ischemic stroke, while sodiumemia exceeded the normal levels by 50 mmol/l and more. Meanwhile, the concentrations of Na ions in liquor of such patients was not significantly increased.