The Surgical Treatment of Bleeding Intracranial Aneurysms

operative approaches have been tried-carotid ligation and a direct intracranial exposure of the aneurysm. Carotid ligation is efficacious when the aneurysm is situated on the internal carotid artery itself, but is of less certain value when the aneurysm is situated on the circle of Willis or on one of its distal branches, for it then becomes supplied with blood from the opposite carotid artery, and may once more cause symptoms. Furthermore, in cases of intracranial aneurysm 153 Protected by copyright.