Table 3

Radiographic information

Cohort 1
Aspiration success (n=44)
Cohort 2
Aspiration failure (n=32)
CharacteristicsNo%No%p Value
Site of occlusion0.599
 ICA1125.0928.1
 MCA (M1)2863.61753.1
 MCA (M2)36.8515.6
 Basilar24.513.1
Side of occlusion0.919
 Right1943.21546.9
 Left2352.31650.0
 N/A24.513.1
Dense vessel sign*2259.51250.00.721
Arch type†0.457
 11753.11361.9
 21031.3419.0
 3515.6419.0
Reverse curves (mean)‡1.72.30.107
Severe stenosis (>70%)§36.813.10.820
Catheter diameter (mm), mean1.551.550.713
Vessel diameter (mm), mean¶2.883.260.184
Vessel to catheter ratio (mean)1.872.090.192
Clot length (mm), mean**12.5914.910.268
Clot burden score, mean††6.685.380.104
  • *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.