Abstract T P22: Intra-Aortic Cone-Beam CT Can Shorten Puncture To Treatment Time In Acute Thrombectomy For Acute Ischemic Stroke Patients

Background and purpose: Conventional angiographic assessment of collateral blood flow for internal carotid artery (ICA) or basilar artery (BA) occlusion requires contralateral ICA angiography and posterior circulation angiography. The angiography of other vessels may cause time delay for endovascular therapy (EVT) in acute ischemic stroke patients. In this study, we performed intra-aortic cone-beam CT (Ao-CBCT) for assessment of collateral blood flow and analyzed visualization of collateral flow and elapsed time in EVT compare with conventional angiographic assessment. Methods: From July 2010 to July 2014, patients with ICA or BA occlusion among fifty seven acute ischemic stroke patients treated by EVT were enrolled. The subjects were divided into 2 groups; conventional angiography (CA) group and Ao-CBCT group. Ao-CBCT images were acquired in 20 seconds rotational scan. Contrast medium was injected from ascending aorta with 1mL/s for a total of 30 seconds by use of a 4F or 6F catheter and an imaging delay...