Carotid-cavernous fistula

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Abstract
Abnormal distribution of cerebral vascular flow was studied in a patient who had a traumatic carotid-cavernous sinus fistula. Serial studies were performed using a method for determining relative cerebral vascular flow: 99mtechnetium-diethylenetriamine pentaacetic acid (99mTc-DTPA) was injected i.v. and flow data were processed by a digital computer. Serial studies documented the occurrence of a vascular steal during temporary carotid occlusion; postoperative studies showed disappearance of the steal and obliteration of the fistula. This method for performing vascular flow studies may have broad applications in detailing arterial structures and capillary filling in the brain, and in demonstrating alterations in the cerebral circulation.