The purpose of this study is to assess the efficacy and safety of Self-expanding Intracranial Stent (Tonbridge), by comparing the data obtained from Self-expanding Intracranial Stent (Zhuhai Tonbridge Medical Tech. Co., Ltd.) and LVIS/LVIS Jr. (MicroVention Europe SARL) for endovascular treatment of intracranial aneurysms.

This is a prospective, multi-center, randomized, open, parallel positive controlled, non-inferiority trial. This clinical trial is conducted at more than 2 centers in China, and patients who intend to be treated with stent-assisted coiling for intracranial aneurysms are enrolled. Eligible patients are randomized into experimental group using Self-expanding Intracranial Stent (Tonbridge) or control group using LVIS and LVIS Jr. (MicroVention) in a 1:1 ratio. The purpose of this study is to evaluate the effectiveness and safety of the Self-expanding Intracranial Stent (Tonbridge).

Inclusion Criteria:

• Age 18 to 80 years, any gender;
• Diagnosed as intracranial aneurysm and the subject is assessed as suitable for stent-assisted coiling;
• Subject or guardian is able to understand the purpose of study, shows sufficient compliance with the study protocol and provides a signed informed consent form.

Exclusion Criteria:

• Aneurysm rupture within 30 days before enrollment;
• Diagnosed as blood blister-like aneurysm, pseudoaneurysm, infected aneurysm, or aneurysm related to arteriovenous malformations;
• Conditions that are not appropriate for stent delivery and deployment judged by investigators (severe stenosis of parent artery, severe tortuosity of parent artery, stent failing to reach the lesion, stent in the target lesion of parent artery, etc.);
• Modified Rankin Scale (mRS) score ≥3;
• Heart, lung, liver and renal failure or other severe diseases (intracranial tumor, systemic infection, disseminated intravascular coagulation, myocardial infarction within 12 months before enrollment, history of severe psychosis, severe stenosis or occlusion of cerebral feeding artery, etc.);
• Major surgery within 30 days before enrollment；
• Known coagulation dysfunction or contraindication to anticoagulant and antiplatelet therapy;
• Known allergy to nickel-titanium alloy metal materials;
• Life expectancy <12 months;
• Pregnant or breastfeeding women;
• Subject has participated in other drug or medical device clinical trials within 1 month before signing informed consent;
• Other conditions judged by the investigators as unsuitable for enrollment.