Direct Angio Suite Acute Stroke Intervention With CT/DSA Hybrid Emergency Stroke Unit

Acute Ischemic Stroke, Large Vessel Occlusion

Sliding CT/DSA, One-stop Management, Mechanical Thrombectomy, Emergency Stroke Care

This study investigates whether direct transfer to an emergency stroke unit equipped with NeuAngio-CT reduces time to endovascular reperfusion in patients with acute ischemic stroke and suspected intracranial large-vessel occlusion.Those aged 18-60 years with acute ischemic stroke who are eligible for endovascular thrombectomy within 24 hours of symptom onset will be enrolled. Participants will be randomly assigned to one of two groups. In the intervention group, participants will undergo femoral or radial artery puncture, followed by intracranial and cervical CT angiography with intra-arterial contrast injection (iacCTA) performed using the sliding-rail NeuAngio-CT, and subsequent thrombectomy guided by fused CTA-DSA images. In the control group, participants will receive intracranial and cervical CT angiography with intra-venous contrast injection and the thrombectomy will guided by standard DSA imaging without use of the sliding-rail CT. The primary endpoint is puncture-to-successful-reperfusion time (PRT); if successful reperfusion is not achieved, the end-of-procedure time will be used.

Timely reperfusion is critical for acute ischemic stroke. Current workflows require participants to undergo intracranial and cervical CTA in a CT suite before transfer to the catheterization laboratory, which adds significant delays. Furthermore, conventional intracranial and cervical CTA has limited sensitivity for detecting medium vessel occlusions due to venous contamination and calcification artifacts. We established an emergency stroke unit with NeuAngio-CT, which is sited within the emergency department and integrates clinical assessment, brain imaging, and initial treatment for patients with suspected stroke. It optimizes the thrombectomy workflow by providing a onestop, multimodal diagnostic and therapeutic solution that eliminates patient transfers between CT and the angiography suite. The system enables rapid switching and integration between CT and digital subtraction angiography (DSA) with real-time acquisition and fusion of CT and DSA datasets, yielding more comprehensive and accurate imaging information to support treatment decisions.This is a multicenter, open-label, randomized, parallel-controlled, non-inferiority trial. Those aged 18-60 years with acute ischemic stroke who are eligible for endovascular thrombectomy within 24 hours of symptom onset will be enrolled. Participants must have completed a venous head and neck CTA confirming a treatable vessel occlusion. They will be randomly assigned in a 1:1 ratio to the experimental group or the control group.In the intervention group, participants will undergo femoral or radial artery puncture, followed by intracranial and cervical CT angiography with intra-arterial contrast injection (iacCTA) performed using the sliding-rail NeuAngio-CT, and subsequent thrombectomy guided by fused CTA-DSA images. In the control group, participants will receive intracranial and cervical CT angiography with intra-venous contrast injection and the thrombectomy will guided by standard DSA imaging without use of the sliding-rail CT. The primary endpoint is puncture-to-successful-reperfusion time (PRT); if successful reperfusion is not achieved, the end-of-procedure time will be used. Safety endpoints include total contrast agent volume, cumulative radiation dose, rate of serious surgical complications within 7 days or before discharge, and incidence of adverse events and serious adverse events. All participants will be assessed on the day of enrollment and at postoperative day 7 or hospital discharge.

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