ABSTRACT
Carotid cavernous sinus fistula is abnormal communication between the carotid artery and the cavernous sinus. It can be classified according to three criteria : 1) pathologically into spontaneous or traumatic ; 2) hemodynamically into high flow or low flow fistula ; 3) angiographically into direct or dural fistula. We studied the regional cerebral blood flow changes in traumatic carotid cavernous sinus fistula. Regional cerebral blood flow checked 7 times during trapping procedure. The results are as follows ; 1) regional cerebral blood flow decreased in normal side than in lesion side hemisphere in the state of carotid cavernous fistula. 2) After compression of lesion side common carotid artery over 10 minutes, cerebral blood flow increased in both side. 3) Cerebral blood flow decreased temporary after operation on both side but normalized 2 or 3 weeks later.