[The complex diagnosis of brain edema--swelling in patients in critical states].

In an intensive care unit, 181 patients were electrophysiologically investigated (impedance measuring, rheoencephalography, echoencephalography) and ophthalmoscopied, their plasma and red blood cells electrolytes, red blood cells ATP, levels of histamine, serotonin, and monoamine oxidase activity measured and the state of the lipid peroxidation system determined. The combined investigation ensured the early detection of brain edema or swelling and assessment of preponderance of either process. Increase in serotonin, histamine levels and activation of lipid peroxidation system were shown to play an important role in the pathogenesis of these disorders.