[Brain stem auditory evoked potentials in brain death state].

The authors studied auditory brainstem evoked potentials (BAEP) in 27 organ donors aged 40 to 68 years treated in neurosurgery units in Szczecin and Grenoble. Abnormal results were found in all cases. In 63% of cases no evoked action potentials were obtained, in 34% only the 1st wave was obtained, and in two cases evolution was observed with activity extinction.

[Effect of elimination of supratentorial aneurysms by micro- surgical method on early structural and functional changes near the operation site].

On the basis of neurological, psychological and computed tomographic studies of the head early consequences of microsurgical elimination of supratentorial brain aneurysms were analysed in a group of 37 patients. It was shown that this method of aneurysm treatment may lead to brain oedema near the operation site. Oedema development was observed most frequently in cases of prolonged pressure exerted by spatulae on the brain tissue during the operation, aneurysm location in the anterior cerebral artery system and in cases operated on from 4 to 10 days after subarachnoid haemorrhage.

[Diagnosis of progressive open internal hydrocephalus in patients after cranio-cerebral injuries and subarachnoid hemorrhage].

Late internal hydrocephalus has been diagnosed in 68 (44%) out of 154 patients treated for the ruptured cerebral aneurysms, and in 37 (31%) out of 120 patients, who underwent cranio-cerebral trauma. To establish the indications for shunts, CT scans of the skull, tomoventriculography, and infusion tests have been carried out in 38 patients. It has been found, that increased transparency of the areas below cerebral ependyma, the lack of cerebral cortex sulci, and imaging of the temporal horns together with internal hydrocephalus in CT scans indicate an active process and are indications to shunting.

[Effects of classical and microsurgical methods of exclusion of cerebral aneurysms on the structural and functional changes near the operation site].

The effects of classical and microsurgical methods of exclusion of supratentorial intracranial aneurysms on the development of ischaemic changes at the site of approach to the aneurysm were studied. In cases of internal carotid artery aneurysms and middle cerebral artery aneurysms the use of microscope reduced the occurrence of ischaemic changes at the site of approach. In cases of aneurysms of the anterior cerebral artery system the frequency of these changes was similar with both methods.

[Our method of management of the cases of intracranial hematoma--late results of the treatment].

An original method of qualification for surgical treatment of patients with non-traumatic intracerebral haematoma is described. The qualification is based on the main elements of the intracranial volume compensation: 1. function of midline structures (F), 2.