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Table 2 Characteristics of thrombectomy procedures and outcomes in the three years

From: Cumulative experience improves the procedures of mechanical thrombectomy

 

Total (n = 222)

1st year (n = 50)

2nd year (n = 68)

3rd year (n = 104)

P

P (1st vs.2nd)

P (2nd vs.3rd)

Door to groin puncture time (min)

122 (92–155)

152 (123–189)

119 (85–149)

106 (84–135)

< 0.001

< 0.001

0.507

Puncture to first recanalization time (min)

66 (51–102)

70 (53–119)

68 (54–103)

60 (45–79)

0.033

0.063

0.079

Door to first recanalization time (min)

197 (163–240)

240 (185–280)

194 (165–227)

177 (145–218)

< 0.001

< 0.001

0.111

Onset to first recanalization time (min)

340 (279–428)

357 (294–420)

352 (285–494)

311 (256–378)

0.005

0.073

0.005

Number of device passes

2 (1–3)

2 (1–4)

1 (1–2)

2 (1–3)

0.013

0.016

0.076

Additional interventionsa

37 (16.7%)

9 (18.0%)

14 (20.6%)

14 (13.5%)

0.367

0.727

0.217

First pass effect

36 (16.2%)

3 (6.0%)

12 (17.6%)

21 (20.2%)

0.035

0.062

0.679

mTICI score

    

< 0.001

0.002

0.736

 3

107 (48.2%)

15 (30.0%)

36 (52.9%)

56 (53.8%)

   

 2b

74 (33.3%)

16 (32.0%)

23 (33.8%)

35 (33.7%)

   

 2a

24 (10.8%)

11 (22.0%)

5 (7.4%)

8 (7.7%)

   

 1

9 (4.1%)

3 (6.0%)

2 (2.9%)

4 (3.8%)

   

 0

8 (3.6%)

5 (10.0%)

2 (2.9%)

1 (1.0%)

   

Successful recanalization

181 (81.5%)

31 (62.0%)

59 (86.8%)

91 (87.5%)

0.001

0.002

0.888

mRS 0–2 at 90 days

85 (38.3%)

17 (34.0%)

25 (36.8%)

43 (41.3%)

0.357

0.758

0.549

Any ICHb

91 (41.4%)

25 (50.0%)

30 (44.8%)

36 (35.0%)

0.062

0.577

0.200

sICH b

18 (8.2%)

6 (12.0%)

6 (9.0%)

6 (5.8%)

0.183

0.593

0.438

Death at 90 days

43 (19.4%)

12 (24.0%)

12 (17.6%)

19 (18.3%)

0.462

0.399

0.918

  1. Abbreviations: mTICI modified thrombolysis in cerebral infarction, mRS modified Rankin scale, ICH intracranial hemorrhage, sICH symptomatic intracranial hemorrhage
  2. aAdditional interventions included aspiration, intra-arterial thrombolysis, balloon dilation, and stent implantation
  3. bAny ICH and sICH were assessed in 220 patients while 1 patient in the 2nd year and 1 patient in the 3rd year died before repeated imaging