The primary endpoint of our study is to determine whether neurological symptoms (aphasia, paresis, loss of consciousness, numbness) occur after clamping the internal carotid artery, and if so, changes showed by transcranial Doppler or INVOS monitor is more sensitive regarding the symptoms? Secondary endpoint: the degree of change in the measured parameters after the internal carotid artery is clamped, and if there is any difference between the operated and non-operated sides?
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to determine the changes in MCA flow velocity in patient with intraoperative neurological symptoms
Timeframe: 15 month
to determine the changes in cerebral O2 saturation in patient with intraoperative neurological symptoms
Timeframe: 15 month