[Results of rheoencephalographic studies in chronic subdural hematoma].

In cases of chronic subdural haematomas rheoencephalographic investigations were carried out before the operation finding changes indicating increased tension of the walls of the cerebral arteries, venous stasis and reduced cerebral blood flow. In the light of a survey of the literature and own investigations the author believes that these changes are a response to increased vascular resistance in the brain in the process of compensation of increasing intracranial pressure. The author believes that the causes of localization of the changes mostly on the side of haematoma is the local action of the non-invasive brain compressing process.