[Results of the surgical treatment of patients with single aneurysms of the middle cerebral artery].

Results are presented of surgical treatment of patients with isolated aneurysms on the middle cerebral artery on the basis of the material of the Department of Neurosurgery, Medical Academy in Warsaw in the years 1975-1981. The material included 161 surgically treated patients out of 179 treated in this time period for diagnosed isolated aneurysm of this artery. The frequency of this aneurysm was 23.2% in this material. The operative mortality was 8.9%, and the results were very good and good in 85.7% of cases. The number of past bleedings from the aneurysm, the clinical state of the patients, the timing of the operation, presence of intracerebral haematoma, intraoperative rupture of the aneurysm and postoperative vasospasm were factors having a significant unfavourable influence on the early postoperative results. Vasospasm was the most frequent postoperative complication observed in 15.2% of cases. The clinical state of the patient and the mode of aneurysm management had a statistically significant effect on the late results of surgical treatment. In 6 cases (6.1%) subarachnoid bleeding appeared after the operation and in 5 of them aneurysm wall had to be strengthened (wrapping).