[Assessment of cerebral blood flow velocity changes by transcranial Doppler examination in patients with closed craniocerebral trauma].

24 patients after minor or moderate, closed isolated head injuries and 10 patients of control group were included to this study. Right after admission blood flow velocities of both middle cerebral arteries (MCAs) by using transcranial Doppler method (TCD) and blood flow velocities of both extracranial parts of internal carotid arteries (ICAs) by "duplex-scan method" were examined. Changes in mean flow velocities (MFVs) in MCAs and ICAs, VMCA/VICA ratio were analysed. 40% of patients who had minor or moderate head injury demonstrated increase of MCA velocity homolateral to the trauma or bilateral. We observed cerebral hyperemia in 16.7% of patients and posttraumatic vasospasm (TVSP) in 25% of patients. There is a high risk of occurring TVSP in patients with CT shows evidence of subdural or intracerebral hematoma.