Findings from a group of 174 patients with mild traumatic brain injury admitted for observation to the Department of Neurosurgery, 1st Faculty of Medicine, Central Military Hospital, Prague, during the last two years are presented. The group was divided into five classes according to the following criteria: class I = GCS 15, no specific clinical factor, no general risk factor, class II = GCS 15 + specific clinical factor,no general risk factor, class III =GCS15 + general risk factor, regardless of the presence of specific clinical factors, class IV = GCS 14, class V = GCS 13. Specific clinical factors represent risk factors related to trauma, clinical risk factors are related to the general health state of the patient. All patients were examined by a neurologist and had a CT scan of the brain. The majority of patients were classified as class II (58.6 %). Classes III, IV and V represented 38.5 % of the whole group. Abnormal brain CT scan was found in 9.2 % cases, most frequently in class V (57.1 %) and least often in class II (3.9 %). In two cases, surgical treatment was required (1 in class IV and 1 in class V). Based on these results,we conclude that admission to neurosurgery is clearly advantageous for patients in classes III.–V. In class II, in-patient observation, after an obligatory brain CT scan, can be carried out in any hospital department.

        Key words: mild traumatic brain injury, CT scan, in-patient observation