Cohort 1 Aspiration success (n=44) | Cohort 2 Aspiration failure (n=32) | ||||
---|---|---|---|---|---|
Characteristics | No | % | No | % | p Value |
Site of occlusion | 0.599 | ||||
ICA | 11 | 25.0 | 9 | 28.1 | |
MCA (M1) | 28 | 63.6 | 17 | 53.1 | |
MCA (M2) | 3 | 6.8 | 5 | 15.6 | |
Basilar | 2 | 4.5 | 1 | 3.1 | |
Side of occlusion | 0.919 | ||||
Right | 19 | 43.2 | 15 | 46.9 | |
Left | 23 | 52.3 | 16 | 50.0 | |
N/A | 2 | 4.5 | 1 | 3.1 | |
Dense vessel sign* | 22 | 59.5 | 12 | 50.0 | 0.721 |
Arch type† | 0.457 | ||||
1 | 17 | 53.1 | 13 | 61.9 | |
2 | 10 | 31.3 | 4 | 19.0 | |
3 | 5 | 15.6 | 4 | 19.0 | |
Reverse curves (mean)‡ | 1.7 | 2.3 | 0.107 | ||
Severe stenosis (>70%)§ | 3 | 6.8 | 1 | 3.1 | 0.820 |
Catheter diameter (mm), mean | 1.55 | 1.55 | 0.713 | ||
Vessel diameter (mm), mean¶ | 2.88 | 3.26 | 0.184 | ||
Vessel to catheter ratio (mean) | 1.87 | 2.09 | 0.192 | ||
Clot length (mm), mean** | 12.59 | 14.91 | 0.268 | ||
Clot burden score, mean†† | 6.68 | 5.38 | 0.104 |
*Graded on non-contrast CTH (80.3% available for review).
†Graded on CTA or DSA (69.7% adequate for review).
‡Graded on CTA or DSA (89.5% adequate for review).
§Graded on CTA or DSA (100%).
¶Measured on CTA (60.5% adequate for review).
**Measured on CTA (44.7% adequate for review).
††Measured on CTA (57.9% adequate for review).
CTA, CT angiogram; CTH, CT head; ICA, internal carotid artery; MCA, middle cerebral artery.