Article Figures & Data
Figures
- Fig 1.
First and second columns (patients 1 and 2) show pre- (a) and postprocedural (b) angiograms of patients with a proximal M1 occlusion as well as schematics of the vessel anatomy (c). The thrombus site is hatched red and yellow. In patient 1, the ICA/M1 was 53° and the M1/M1 was 18°, and he was successfully recanalized (TICI 3). Patient 2 presented with an ICA/M1 of 140° and an M1/M1 of 105°. In this patient, thrombectomy was unsuccessful (TICI 0). Third and fourth columns (patients 3 and 4) show pre- (a) and postprocedural (b) angiograms of patients with a proximal M2 occlusion as well as vessel schematics (c). While patient 3 presented with an M1/M2 angle of 51° and was successfully recanalized (TICI 3), in patient 4, an M1/M2 angle of 128° was measured and thrombectomy was unsuccessful (TICI 1).
Tables
- Table 1:
Epidemiologic, clinical, and technical parameters for all patients and a comparison between subgroups, depending on recanalization success
Parameter All Patients TICI 0–2a TICI 2b/3 P Value Group/subgroup size 159 24 (15.1%) 135 (84.9%) Female sex (No., % of subgroup) 79 (49.7%) 11 (45.8%) 68 (50.4%) .825 Age (yr, mean) 70 ± 12.8 70 ± 10.7 70 ± 13.2 .964 Wake-up (No., % of subgroup) 30 (18.9%) 3 (12.5%) 27 (20%) .572 Time symptom onset to puncture (min, mean)a 230 ± 80.0 232 ± 82.6 230 ± 79.9 .902 Procedure time (min, mean)b 55 ± 35.1 69 ± 38.2 53 ± 34.3 .058 Time onset to recanalization (min, mean)c 285 ± 86.9 303 ± 96.7 283 ± 85.4 .349 NIHSS score at admission (median, range) 15 (4–27) 16 (7–24) 14 (4–27) .198 IV rtPA administered (No., % of subgroup) 112 (70.4%) 15 (62.5%) 97 (71.9%) .345 General anesthesia applied (No., % of subgroup) 127 (79.9%) 20 (83.3%) 107 (79.3%) .787 Passages of device (No., median, range) 2 (1–12) 4 (1–10) 2 (1–12) .008d <1 Device used (No., % of subgroup) 55 (34.6%) 14 (58.3%) 41 (30%) .011d - Table 2:
Angles, P values, AUCs for ROC analyses, and optimal cutoff values to differentiate TICI subgroups and Youden indices for different vessel anglesa
Occlusion Pattern Group Size Angle TICI 0–2a (mean) TICI 2b/3 (mean) P ROC AUC Cutoff and Youden index Proximal (carotid T or proximal M1 segment) 125 ICA/M1 110 ± 23.8 69 ± 28.7 .000b .872d 100° (J = 0.69) 125 M1/M1 56 ± 29.2 29 ± 26.6 .001b .759d 36° (J = 0.40) Distal (distal M1 or proximal M2 segment) 36 M1/M2 117 ± 34.3 67 ± 29.5 .006c .865d 97° (J = 0.64)
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