Correlation between intracranial pressure (ICP) and changes in CT images of cerebral hemorrhage.

The relationship between intracranial pressure and CT images was investigated in 80 cases of cerebral hemorrhage that occurred between 1984 and 1990. In traumatic intracerebral hematoma, positive correlation was found between intracranial pressure and both shift of midline structures and volume of hematoma except in the occipital lobe or at the base of the frontal lobe. In nontraumatic intracerebral hematoma, increased intracranial pressure was found to correlate with changes in the configuration of the lateral ventricles, intraventricular hemorrhage, and compression of the basal cisterns and cortical sulci. No correlation between intracranial pressure and hematoma volume was observed, most likely due to the number of elderly patients in the subject population. In nontraumatic subarachnoid hemorrhage, positive correlation existed between increased intracranial pressure and intraventricular hemorrhage as well as Evans' ratio calculated using repeat CT images that were obtained due to disturbances in cerebrospinal fluid circulation. These results suggest that the degree by which intracranial pressure increases in patients with cerebral hemorrhage can be estimated by the changes in CT images.