To evaluate the efficacy and safety of the blood flow guide device manufactured by Jiangsu Changyida Medical Technology Co., Ltd. for endovascular embolization of intracranial aneurysms

Inclusion Criteria:

●≥18 years old and ≤75 years old, male or unpregnant female

• Untreated and unruptured intracranial wide-necked aneurysm confirmed by preoperative imaging diagnosis (wide-necked aneurysm was defined as the tumor neck ≥4mm or the tumor body/tumor neck ratio <2)
• The target aneurysm is planned to be treated with blood flow guidance device only, without the need to complete the treatment by stages
• The width of tumor neck should be less than 30mm
• Imaging measurements of the tumor parent artery showed that the diameter was 1.5mm ~ 6.5mm
• The subject or legal guardian can understand the purpose of the study, demonstrate sufficient compliance with the study protocol, and sign the informed consent

Exclusion Criteria:

• The target aneurysm has previously received craniotomy clipping or other endovascular interventional treatment
• Target aneurysms were haemacular aneurysms, pseudoaneurysms, arteriovenous malformations and moyamoya disease related aneurysms
• DSA suggested vascular path tortuosity or severe arteriosclerosis, and it was difficult for the instrument to reach the target vessel
• Contraindications to dual antiplatelet therapy and anticoagulation therapy
• Patients with known clear allergy to nickel-titanium alloys and platinum-tungsten alloys
• People with known severe allergy to contrast media (excluding rash)
• patients with known dementia or mental illness
• Preoperative complicated with serious heart, liver, kidney, respiratory system diseases and bleeding disorders
• Life expectancy is less than one year
• Is participating in, or may participate in, any other drug or medical device clinical trial after inclusion in this clinical trial
• Other conditions determined by the investigator to be unsuitable for participation in this clinical trial