Table 2.

Summary of afferents in 76 patients with dural carotid cavernous fistulas.

	Affected sinus
Barrow type*	Ipsilateral cavernous sinus	Bilateral cavernous sinus
	(Direct inflow into ICS)
A	—	—
B	3(0)	0(0)
C	3(0)	0(0)
D	13(4)	0(0)
D&D	16(11)	22(17)
D&B	7(3)	4(1)
D&C	2(1)	2(2)
B&B	1(0)	1(0)
C&C	1(1)	1(0)
Total	46(20)	30(20)

Barrow type*.

Type A fistulas are direct shunts between the internal carotid artery and the cavernous sinus.

Type B, C, and D fistulas are dural shunts.

B between meningeal branches of the internal carotid artery and the cavernous sinus.

C between meningeal branches of the external carotid artery and the cavernous sinus.

D between meningeal branches of both internal and external carotid arteries and the cavernous sinus, ICS: inter-cavernous sinus.