Compare the Safety and Effectiveness of Two Different Kinds of Stent System in Intracranial Aneurysms

A Prospective, Multicenter, Randomized Controlled Trial to Evaluate the Safety and Effectiveness of the SINOMED IAS for the Treatment of Intracranial Aneurysms

The primary objective of this trial is to evaluate the safety and efficacy of SINOMED IAS in patients with intracranial aneurysms.

Study Overview

• Status: Completed
• Conditions: Intracranial Aneurysm
• Intervention / Treatment: Device: SINOMED IAS Stent System; Device: Neuroform Atlas Stent System

Detailed Description

This study is a prospective, multicenter, 1:1 randomized clinical trial to evaluate the safety and efficacy of stent system in the treatment of intracranial aneurysms. A total of 204 patients are planned to be included. The primary endpoint is the incidence of success aneurysm occlusion at 6-month post procedure. All patients will have clinical follow-up during intraoperative, 30 days, 6 months, 1 year.

• Study Type: Interventional
• Enrollment (Actual): 203
• Phase: Not Applicable

Contacts and Locations

Study Locations

• China
  • Beijing, China
    • Beijing Tiantan Hospital, Capital Medical University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Age 18 years to 80 years.
2. Wide-necked (Wide-necked is defined as width ≥ 4 mm or a dome-to-neck ratio < 2), saccular, intracranial aneurysms arising from a parent vessel with a diameter of ≥ 2.5 mm and ≤ 5mm.
3. Modified Rankin Scale (mRS) ≤ 2.
4. Subject understands the nature of the procedure, provides voluntary written informed consent prior to the treatment, and is willing to comply with specified follow-up evaluation.
5. The investigators judged the use of stent-assisted coil embolization to be appropriate for the treatment of intracranial aneurysm.

Exclusion Criteria:

1. Target aneurysm is an aneurysm requiring staged procedure.
2. Target aneurysm that has been previously treated with vascular embolization or surgery.
3. Target aneurysms are fusiform aneurysms, dissecting aneurysms, pseudoaneurysms, blood blister-like aneurysms, infected aneurysms, aneurysms associated with arteriovenous malformations.
4. Hospitalized surgical treatment within 30 days before operation, or planned hospitalized surgical treatment within 6 months after surgery.
5. Acutely ruptured aneurysm within 14 days of enrollment.
6. Hunt and Hess (H&H) scale ≥3.
7. Subject who had Moyamoya disease, arteriovenous malformations, arteriovenous fistulae, intracranial tumors, or intracranial mass lated to target aneurysms.
8. Severe stenosis or tortuosity of intracranial arteries or anatomical anomalies that make it difficult to reach the site of the lesion with device.
9. Platelet count <50*103/mm3 (50*109/L) or any known coagulation deficiency, or International normalized ratio (INR)>3.0.
10. Known hypersensitivity/allergies or contraindication to contrast media, stent components, antiplatelets, anticoagulants.
11. Life expectancy < 1 year, and unable to complete the required follow-ups;
12. Female who was pregnant or breastfeeding, women/men planning to havve children in the next year.
13. Currently enrolled in another investigational device or drug study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: SINOMED IAS Stent System; The SINOMED IAS Stent System is intended for use with occlusive devices in the treatment of intracranial aneurysms.	Device: SINOMED IAS Stent System; Stent-assisted coiling (SAC) of intracranial aneurysms paved the way for endovascular coiling of wide-neck aneurysms, improving rates of aneurysm obliteration and recurrence.
Active Comparator: Neuroform Atlas Stent System; The Neuroform Atlas Stent System is intended for use with occlusive devices in the treatment of intracranial aneurysms.	Device: Neuroform Atlas Stent System; Stent-assisted coiling (SAC) of intracranial aneurysms paved the way for endovascular coiling of wide-neck aneurysms, improving rates of aneurysm obliteration and recurrence.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Success aneurysm occlusion at 6 month post procedure	The Raymond-Roy occlusion classification (RROC) is an angiographic classification scheme for grading the occlusion of flow diverter treated cerebral aneurysms (class I: complete obliteration, class II: residual neck, class III: residual aneurysm). Higher class represent a worse outcome. The percentage of Success aneurysm occlusion in which class 1 or 2 is achieved on the Raymond Scale at the 6 months follow-up angiographic assessments will be evaluated.	6 months post procedure

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Rate of Device defect	Device defects refer to the unreasonable risks that may endanger human health and life safety during the normal use of medical devices in the course of clinical trials, such as label errors, quality problems, failures, etc.	within 1 year of whole trial
Technical success	Technical success defined as stable stent placement with complete coverage across the aneurysm neck and parent artery patency.	Intra-procedure
Success aneurysm occlusion immediately after the procedure	The percentage of aneurysms in which class 1 or 2 is achieved on the Raymond Scale immediately post-procedure angiographic assessments, will be evaluated.	Immediately after the procedure
Complete aneurysm occlusion without significant parent artery stenosis (≤50%) or retreatment at 6 months post procedure	Proportion of subjects with complete occlusion of the target aneurysm, ≤50% stenosis of the parent artery at the target intracranial aneurysms (IA) at 6 months as assessed by angiography, and in whom an unplanned alternative treatment of the target IA had not been performed within 6 months.	6 months post procedure
Complete aneurysm occlusion at 6 months post procedure	Complete occlusion defined as complete obliteration of the aneurysm sac, including the neck (Raymond I).	6 months post procedure
Retreatment Rate at 6 months and 1 year post procedure	The percentage of target aneurysms that are retreated at any time up to and including the 6 months and 1 year follow-up visit will be evaluated. Retreatment will be defined as any additional treatment of the target aneurysm after the index procedure (retreatment includes staged procedures), and (regardless of whether retreatment is by surgery or endovascular treatment) due to recanalization, rupture or bleeding.	6 months, 1 year post procedure
In-Stent Stenosis at 6 months post procedure	In-stent stenosis defined as greater than 50% narrowing of the vessel within the stent or within 5mm of either end of the stent.	6 months post procedure
Modified Rankin Scale (mRS) at 30 days, 6 months and 1 year post procedure	Observed scores on the Modified Rankin Scale will be presented at baseline (pre-procedure) and follow-up (30 days, 6 and 12 months post-procedure). The number and percentage of subjects who have an mRS ≤ 2 will be evaluated.	30 days, 6 months, 1 year post procedure
Major ipsilateral stroke at 30 days, 6 months and 1 year post procedure	National Institute of Health Stroke Scale (NIHSS) was used to assess patients after stroke in an 11-item scale with potential scores ranging from 0 to 42. Higher values represent a worse outcome. A major stroke is defined as a new neurological event which is ipsilateral and in the vascular distribution territory of the stenting procedure and that results in an increase of ≥ 4 on the NIHSS as compared to baseline.	30 days, 6 months, 1 year post procedure
All-cause mortality at 30 days, 6 months and 1 year post procedure	Deaths due to any cause are calculated.	30 days, 180 days and 1 year post procedure
Incidence of adverse events/serious adverse events during 30 days, 6 months and 1 year post procedure	Percentage (%) of participants who experienced adverse events/serious adverse events.	30 days, 6 months and 1 year post procedure
In-stent thrombosis at 6 months post procedure	Stent thrombosis defined as a thrombotic occlusion of a stent.	6 months post procedure

Collaborators and Investigators

• Sponsor: Sinomed Neurovita Technology Inc.
• Investigators: Principal Investigator: xinJian Yang, Beijing Tiantan Hospital

Study record dates

Study Major Dates

• Study Start (Actual): January 17, 2024
• Primary Completion (Actual): November 20, 2025
• Study Completion (Actual): November 20, 2025

Study Registration Dates

• First Submitted: March 4, 2024
• First Submitted That Met QC Criteria: March 4, 2024
• First Posted (Actual): March 12, 2024

Study Record Updates

• Last Update Posted (Actual): March 17, 2026
• Last Update Submitted That Met QC Criteria: March 13, 2026
• Last Verified: March 1, 2026

More Information

Terms related to this study

• Keywords: Stent; Cerebral Aneurysm; Brain Aneurysm; wide-necked cerebral aneurysms
• Additional Relevant MeSH Terms: Cerebrovascular Disorders; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Vascular Diseases; Cardiovascular Diseases; Intracranial Arterial Diseases; Aneurysm; Intracranial Aneurysm
• Other Study ID Numbers: SNSC-IAS-202301

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No