Combined microneurosurgical and endovascular "trapping-evacuation" technique for clipping proximal paraclinoidal aneurysms.

A method is described in which a combined endovascular and microneurosurgical approach is used for clipping aneurysms of the proximal paraclinoidal segment of the internal carotid artery. By temporary occlusion of the cervical carotid artery and continuously retrograde sucking of blood from the distal vessel via a double lumen ballon catheter, clip application to large and critically located aneurysms is facilitated applying decompression to the trapped arterial segment under intraoperative somatosensory-evoked potential (SEP) monitoring.