TABLE 2:
Collateral pathways
Type of Collateral Flow
No. of Patients (%)
No. after Intervention
Ophthalmic
9(26.5)
0
Anterior cross-flow
16(47.1)
1
Posterior
10(29.4)
0
Leptomeningeal
6(17.6)
0
None or insufficient bone window
7(20.6)
0