Purpose: This study aimed to compare the efficacy and safety of a direct aspiration first-pass technique (ADAPT) and stent retriever thrombectomy (SRT) technique in embolism-related acute basilar artery occlusion (EMB-ABAO).
Methods: We collected data from patients with EMB-ABAO in multiple stroke centers from January 2017 to February 2024. We defined two groups of enrolled patients, the ADAPT group and the SRT group. The primary outcome was the first attempt recanalization (FAR) rate. Secondary outcomes were the puncture to recanalization (PTR) time and the 90-day favorable functional outcome. The safety outcome was 90-day all-cause mortality rate.
Results: A total of 406 patients were screened for endovascular treatment (EVT) of ABAO ischemic stroke, and 108 patients were identified with EMB-ABAO stroke. Among these, 96 patients were included in the final analysis. Among them, 58 (60.42%) were in the ADAPT group, and 38 (39.58%) were in the SRT group. Compared with the SRT group, the ADAPT group achieved FAR more frequently (60.34% versus 39.47%; p = 0.045) and a higher 90-day favorable functional outcome rate (44.83% versus 36.84%; p = 0.438). The median PTR time of the ADAPT group was significantly shorter than that of the SRT group (42 versus 105 min; p < 0.001).
Conclusion: In cases where EMB-ABAO is suspected, ADAPT was superior to SRT in terms of FAR rate and PTR time, but the 90-day mRS scores had no statistical significance. Given the reduced time to recanalization with ADAPT, an initial attempt at recanalization with ADAPT may be necessary before stent retriever. However, due to the study limitations, these findings should be interpreted as preliminary and require further study.
Keywords: Acute basilar artery occlusion; aspiration thrombectomy; embolism; stent retriever thrombectomy.