The classification by Barrow et al. is used to classify spontaneous Carotid cavernous fistulas and was published in 1985[^1].
Classification
According to the Barrow classification, carotid-cavernous fistulas are divided into 4 groups:
Barrow type | Characteristics | Flow characteristics |
Type A | Direct shunt connection between the internal carotid artery and the cavernous sinus | High-flow |
Type B | Connection between meningeal branches of the internal carotid artery and the cavernous sinus | Low-flow |
Type C | Connection between meningeal branches of the Arteria carotis externa | Low-flow |
Type D | Connection between meningeal branches of both the external carotid artery and the internal carotid artery and the cavernous sinus | Low-flow |
