Late Thrombectomy in Clinical Practice : Retrospective Application of DAWN/DEFUSE3 Criteria within the German Stroke Registry

Clin Neuroradiol. 2021 Sep;31(3):799-810. doi: 10.1007/s00062-021-01033-1. Epub 2021 Jun 7.


Background and purpose: To provide real-world data on outcome and procedural factors of late thrombectomy patients.

Methods: We retrospectively analyzed patients from the multicenter German Stroke Registry. The primary endpoint was clinical outcome on the modified Rankin scale (mRS) at 3 months. Trial-eligible patients and the subgroups were compared to the ineligible group. Secondary analyses included multivariate logistic regression to identify predictors of good outcome (mRS ≤ 2).

Results: Of 1917 patients who underwent thrombectomy, 208 (11%) were treated within a time window ≥ 6-24 h and met the baseline trial criteria. Of these, 27 patients (13%) were eligible for DAWN and 39 (19%) for DEFUSE3 and 156 patients were not eligible for DAWN or DEFUSE3 (75%), mainly because there was no perfusion imaging (62%; n = 129). Good outcome was not significantly higher in trial-ineligible (27%) than in trial-eligible (20%) patients (p = 0.343). Patients with large trial-ineligible CT perfusion imaging (CTP) lesions had significantly more hemorrhagic complications (33%) as well as unfavorable outcomes.

Conclusion: In clinical practice, the high number of patients with a good clinical outcome after endovascular therapy ≥ 6-24 h as in DAWN/DEFUSE3 could not be achieved. Similar outcomes are seen in patients selected for EVT ≥ 6 h based on factors other than CTP. Patients triaged without CTP showed trends for shorter arrival to reperfusion times and higher rates of independence.

Keywords: Endovascular therapy; Late thrombectomy; Outcome; Stroke.

Publication types

  • Multicenter Study

MeSH terms

  • Brain Ischemia*
  • Humans
  • Registries
  • Retrospective Studies
  • Stroke* / diagnostic imaging
  • Stroke* / therapy
  • Thrombectomy
  • Treatment Outcome