Electrothrombosis of carotid-cavernous fistula.

The author describes a technique for directly closing a carotid cavernous fistula with electrothrombosis while preserving the intracranial arterial circulation. Copper wires are introduced through the superior ophthalmic vein or a frontotemporal craniotomy, and thus directly into the portion of the sinus into which the fistula drains; if posterior, into the posterior segment of Parkinson's triangle, if inferior, into the pterygoid plexus, and if anterior, through the sphenoparietal sinus and/or middle cerebral vein to the anterior-inferior portion of the sinus. A direct current is applied until a thrombus is confirmed angiographically and the wires are left in place. Four patients treated by this method are presented.