INdobufen Versus asPirin in Endovascular Unruptured Intracranial Aneurysms Treatment (INPUT)

Not Applicable

Not yet recruiting

• Conditions: Unruptured Intracranial Aneurysm; Indobufen
• Interventions: Drug: Indobufen treatment; Drug: Aspirin treatment

• Registration Number: NCT07089862
• Lead Sponsor: Beijing Tiantan Hospital

Brief Summary

This project aims to evaluate the safety and efficacy of the antiplatelet regimen combining indobufen and clopidogrel in preventing ischemic events after stent-assisted coiling embolization and flow diverter implantation for intracranial aneurysms.

Using a randomization system, patients with unruptured intracranial aneurysms scheduled for interventional treatment will be divided into an experimental group and a control group. Patients in the experimental group will be required to take indobufen (100 mg twice daily) + clopidogrel (75 mg once daily) starting 5 days before the procedure and continuing until 180 days postoperatively. Patients in the control group will be required to take aspirin (100 mg once daily) + clopidogrel (75 mg once daily) starting 5 days before the procedure and continuing until 180 days postoperatively.

An independent group of researchers will assess cerebrovascular thromboembolic events and bleeding events at different time points.

Detailed Description

Not available

Study Timeline

• Status Verified: 2025-06
• Study First Submitted: 2025-07-22
• Study First Submitted QC: 2025-07-22
• Study First Posted: 2025-07-28
• Last Update Submitted: 2025-08-20
• Last Update Posted: 2025-08-22
• Study Start: 2025-08-31
• Primary Completion: 2026-12-31
• Study Completion: 2026-12-31

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 2500

Inclusion Criteria

1. Age 18-75 years (male or female);
2. Radiologically confirmed saccular intracranial aneurysm (by specialist assessment);
3. Scheduled for endovascular embolization (including: coil embolization with stent assistance or flow diversion);
4. Signed informed consent obtained.

Exclusion Criteria

1. Concomitant vascular malformations, tumors, abscesses or other cerebral diseases such as multiple sclerosis;
2. Major surgery within 30 days prior to enrollment including fracture surgery or hip replacement;
3. History of ischemic stroke, ischemic heart disease or hemorrhagic disorders including intracranial hemorrhage, gastrointestinal bleeding, fundus hemorrhage or unexplained bleeding within the past 6 months;
4. Planned elective surgery within 3 months after the procedure;
5. Any hematologic disorders or inherited coagulation abnormalities;
6. Severe renal or hepatic dysfunction;
7. History of hemostatic disorders, systemic bleeding, thrombocytopenia or neutropenia;
8. History of symptomatic non-traumatic intracranial hemorrhage or cerebral amyloid angiopathy;
9. Severe cardiopulmonary diseases considered by investigators to be unsuitable for the study;
10. Women of childbearing potential with negative pregnancy test but refusing contraceptive measures, or those who are pregnant or lactating;
11. Current participation in other investigational drug or device trials.

Withdrawal Criteria:

1. Receiving aneurysm treatment other than coil embolization with stent assistance or flow diversion;
2. Occurrence of endpoint events during stent-assisted aneurysm embolization procedure (as adjudicated by the Clinical Events Committee), including procedure-related hemorrhagic events (aneurysm rupture, parent artery rupture, subarachnoid hemorrhage, acute ipsilateral intracerebral hemorrhage, and acute ipsilateral subdural/epidural hematoma) or ischemic events (acute large vessel occlusion, in-stent thrombosis, and diffuse ipsilateral vascular infarction caused by plaque dislodgement);
3. Device-related quality issues during stent-assisted embolization, including stent problems (stent fracture, failure to deploy properly, incomplete expansion due to product defect) and coil problems (premature detachment before intentional deployment, coil unraveling, and failure to detach);
4. Postoperative life expectancy <3 months;
5. Inability to complete 5-day premedication due to emergency surgery or other reasons;
6. Intolerance to oral antiplatelet therapy due to allergy or other contraindications.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Indobufen+clopidogrel group	Indobufen treatment	Patients in the experimental group will be required to take indobufen (100 mg twice daily) + clopidogrel (75 mg once daily) starting 5 days before the procedure and continuing until 180 days postoperatively.
Aspirin+clopidogrel group	Aspirin treatment	Patients in the control group will be required to take aspirin (100 mg once daily) + clopidogrel (75 mg once daily) starting 5 days before the procedure and continuing until 180 days postoperatively.

Primary Outcome Measures

Name	Time	Method
Primary Efficacy Endpoint Events: Cerebrovascular thromboembolic events occurring within 90 days postoperatively	within 90 days after endovascular treatment of unruptured intracranial aneurysms	Cerebrovascular thromboembolic events within 90 days after endovascular treatment of unruptured intracranial aneurysms, including: Ischemic stroke, Transient ischemic attack (TIA), Stent thrombosis, Emergency revascularization, Cerebrovascular death
Primary Safety Endpoint Events: Incidence of bleeding events classified as Type 2, 3, or 5 according to the Bleeding Academic Research Consortium (BARC) criteria within 90 days after endovascular treatment of unruptured intracranial aneurysms.	Within 90 days after endovascular treatment of unruptured intracranial aneurysms.	Bleeding events classified as Type 2, 3, or 5 according to the Bleeding Academic Research Consortium (BARC) criteria within 90 days after endovascular treatment of unruptured intracranial aneurysms.

Secondary Outcome Measures

Name	Time	Method
Cerebrovascular thromboembolic events occurring within 30 days postoperatively	Within 30 days postoperatively	Cerebrovascular thromboembolic events within 30 days after endovascular treatment of unruptured intracranial aneurysms, including: Ischemic stroke, Transient ischemic attack (TIA), Stent thrombosis, Emergency revascularization, Cerebrovascular death
Cerebrovascular thromboembolic events occurring within 180 days postoperatively	Within 180 days postoperatively	Cerebrovascular thromboembolic events within 180 days after endovascular treatment of unruptured intracranial aneurysms, including: Ischemic stroke, Transient ischemic attack (TIA), Stent thrombosis, Emergency revascularization, Cerebrovascular death
Platelet aggregation rate within 24 hours before surgery	Within 24 hours before surgery	Platelet aggregation rate within 24 hours before surgery, including ADP-induced platelet aggregation, Collagen-induced platelet aggregation and Arachidonic acid-induced platelet aggregation.