Table 1 O’Kelly-Marotta grading scale used to assess the degree of angiographic filling and contrast stasis when using flow diverter stents to treat aneurysms
Stasis Phase | ||||
|---|---|---|---|---|
1: no stasis (arterial phase clearance prior to capillary phase) | 2: moderate stasis (arterial phase clearance prior to venous phase) | 3: significant stasis (persistent contrast at venous phase) | ||
Aneurysm Filling | A: total filling (> 95%) | A1 | A2 | A3 |
B: subtotal filling (5–95%) | B1 | B2 | B3 | |
C: entry remnant (1–5%) | C1 | C2 | C3 | |
D: no filling (0%) | D | N/A | N/A | |