[Determination of normal rheoencephalographic parameters in childhood].

Being a non-invasive method rheoencephalography (in combination with other supplementary methods) is particularly recommended for objective estimation of changes of the cerebral hemodynamics in children. Normal parameters are the basis for discovering and estimating abnormalities. A standardized program was used for examining 677 healthy children aged 0 to 16 years. The children were examined in the sitting, standing, and lying positions, as well as after hyperventilation. After calculating the mean values for one age group and comparing these values in all groups the children were divided into six age groups. For each group the mean values of the amplitude, the anacrotic phase duration, the total duration of the pulse wave, the relative pulse volume, and the height and amplitude of the dicrotic wave were determined. Besides that functional rheographic relations were found: their use facilitated the acquisition of information on individual reactive peculiarities of the cerebral hemodynamics under loads of the blood circulation system.