With the advancement of medical diagnostic technology and the continuous increase of the elderly population in China,chronic internal carotid artery occlusion(CICAO)is becoming increasingly common in clinical practice.Symptomatic CICAO patients with severe hemodynamic disorders have a high risk of recurrent ischemic stroke.Cognitive impairment related to chronic ischemia in CICAO is also receiving increasing attention.However,there is currently a lack of unified evaluation and treatment plans for CICAO patients in clinical practice.This expert consensus summarized the latest clinical trials and research related to CICAO,and combined the clinical practice experience of domestic experts in related fields to provide targeted opinions on the evaluation,treatment and perioperative management of CICAO patients,in order to further standardize the clinical diagnosis and treatment process of the patients with CICAO in China.

Contrast-induced encephalopathy(CIE)is a rare neurological complication of the intravascular application of a contrast media.The clinical manifestation of CIE which is easily misdiagnosed in clinical is not specific.Recently,with the extensive development of interventional diagnosis and therapy in different disciplines,case report of CIE patient is increasing yearly.At present,there is not a uniform diagnosis and treatment standard for CIE in China and abroad.Chinese Federation of Interventional Clinical Neurosciences organized relevant experts in China and developed the expert consensus,to provide suggestions and references for clinicians at all levels to prevent,identify and treat CIE.