Table 2 Anatomic severity grading scoring system
Attribute | 0 | 1 | 2 | 3 | |
|---|---|---|---|---|---|
Proximal Landing Zone | Whole lumen cross-sectional area contour change (CC1) | <200 mm2 | 200 - 450 mm2 | 450 - 700 mm2 | >700 mm2 |
Maximum whole lumen cross-sectional area (mCSA1) | <1000 mm2 | 1000 - 1100 mm2 | 1100 - 1400 mm2 | >1400 mm2 | |
Left common carotid to left subclavian distance (L1) | >18 mm | 18 - 12 mm | <12 mm | ||
Left common carotid to entry tear distance (L2) | >100 mm | 100 - 25 mm | <25 mm | ||
Calcification and thrombus index (CT) | <0.3 | 0.3 - 0.5 | >0.5 | ||
Curvature and Tortuosity | Thoracic aorta tortuosity index (TT) | <1.25 | 1.25 - 1.35 | >1.35 | |
Intraaortic distance (ID) | >28 mm | 28 - 23 mm | <23 mm | ||
Arch type | Type I | Type II | Type III | ||
Dissection | False lumen cross-sectional area index (FCI) | <0.2 | 0.2 - 0.5 | 0.5 - 0.65 | >0.65 |
False lumen length (FLL) | <300 mm | >300 mm | |||
Tear length | <5 mm | 5 - 17 mm | >17 mm | ||
Number of observable tears | 0 | >0 | |||
Tear circumferential location | Not at outer curvature of arch | At outer curvature of arch | |||
Branch Vessels | Location (BVL) | 0 | 1 - 3 | 4 | >4 |
Patency (BVP) | 0 | 1 - 2 | >2 | ||
Supraceliac Aorta Anatomy | Whole lumen cross-sectional area contour change (CC2) | <300 mm2 | 300 - 400 mm2 | 400 - 600 mm2 | >600 mm2 |
Maximum whole lumen cross-sectional area (mCSA2) | <650 mm2 | 650 - 850 mm2 | 850 - 925 mm2 | >925 mm2 |