Safety and Effectiveness of ENTERPRISE 2 Device in the Endovascular Treatment of Intracranial Aneurysms

Study Overview
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Brief Summary
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The study is designed to evaluate the safety and effectiveness of ENTERPRISE 2 vascular reconstruction device and delivery system (hereinafter referred to as ENTERPRISE 2) to facilitate endovascular coil embolization of intracranial aneurysms.

Detailed Description
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This is a prospective, multicenter, single-arm observational study, in which enrolled patients will be implanted with the ENTERPRISE 2 for evaluation of safety and effectiveness of ENTERPRISE 2 in real-world applications. The study population will consist of 164 patients with ruptured or unruptured intracranial aneurysms and a parent vessel diameter of ≥2.5 mm and ≤4 mm. All patients will be implanted with the study device. The enrolled patients will be followed at 30 days, 180 days, 1 year, 2 years, 3 years, 4 years and 5 years post procedure. The primary endpoint is the incidence of aneurysm recanalization (at 180 days) evaluated through digital subtraction angiography (DSA). Secondary effectiveness endpoints include incidence of aneurysm recanalization (at 1 year), successful stent/coil placement rate (immediately post procedure), aneurysm occlusion (immediately post procedure, at 180 days and 1 year), incidence of retreatment (at 30 and 180 days, and 1, 2, 3, 4 and 5 years). Safety evaluation include: incidence of disabling stroke or neurological death (at 180 days and 1 year), incidence of in-stent thrombosis (at 180 days and 1 year), and incidence of in-stent stenosis (at 180 days and 1 year). Exploratory endpoints include stent wall apposition performance (intra-procedure), first-time deployment success rate (intra-procedure) and duration of stent deployment (intra-procedure).

Official Title
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ENTERPRISE 2 Vascular Reconstruction Device and Delivery System Registry: A Multicenter, Prospective, Single-arm Observational Study to Evaluate the Safety and Effectiveness With the Device to Facilitate Endovascular Coil Embolization of Intracranial Aneurysms

Conditions
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Intracranial Aneurysm

Intervention / Treatment
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* Device: ENTERPRISE 2 device


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient (or his/her legal representative) understands the nature of the procedure and provides voluntary written informed consent for the use of his/her peri-procedural and follow-up data; Aged between 18 years and 80 years of age the time of consent; Patient has been diagnosed with ruptured (Hunt-Hess Grade I-III) or unruptured intracranial aneurysm and requires the endovascular treatment; Parent vessel with a diameter of ≥2.5 mm and ≤4 mm; Patient is willing to return to the investigational site for the post-procedure follow-up evaluations. Exclusion Criteria: Severe co-morbidity associated with a life-expectancy of less than twelve months as determined by the investigator; Poor clinical condition with modified Rankin Scale (mRS) score ≥4; Having prior or potential severe allergic reaction to contrast medium; Known allergies to any of the device components, including Enterprise 2 and PROWLER® SELECT™ Plus Infusion Catheter; Angiogram demonstrating that the aneurysm is not appropriate for endovascular treatment (i.e. severe intracranial vessel tortuosity, stenosis, intracranial vasospasm not responsive to medical therapy); Arteriovenous malformation (AVM) in the territory of the target aneurysm; Unsuitable for the antithrombotic and/or anticoagulant therapies; Implantation of an intracranial stent associated with aneurysm or symptom distribution within 12 weeks prior to signature of Informed Consent Form; Implantation of a carotid stent associated with aneurysm or symptom distribution within 12 weeks prior to signature of Informed Consent Form; Evidence of active infection; Pregnant or lactating women; Having participated in clinical studies of other investigational drugs or devices within 30 days prior to signature of Informed Consent Form, excluding epidemiological studies of observational nature or natural history or not involving intervention; Pre-planned staged procedure of target aneurysms.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| ENTERPRISE 2 group<br>The study population enrolled for this clinical study is aneurysm patients who need stent-assisted coiling treatment, using ENTERPRISE 2 device. | Device: ENTERPRISE 2 device<br>* The ENTERPRISE 2 Vascular Reconstruction Device is intended for use with occlusive devices in the treatment of intracranial aneurysms.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of aneurysm recanalization | Incidence of aneurysm recanalization (at 180 days) = number of target aneurysm recanalization (at 180 days) ÷ total number of target aneurysms receiving follow-up × 100%. The results of aneurysm angiography at 180-day follow-up will be obtained through DSA, and the post-procedure immediate aneurysm recanalization shown in angiograms will be graded as per the Raymond-Roy Classification Scale. The Raymond-Roy Classification at each follow-up time point increased by ≥ one class relative to that immediately after the procedure is defined as recanalization (e.g., Class I immediately after the procedure, Class II at 180-day follow-up). | at 180 days post procedure | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of aneurysm recanalization | Incidence of aneurysm recanalization (at 1 year) = number of target aneurysm recanalization (at 1 year) ÷ total number of target aneurysms receiving follow-up × 100%. The results of aneurysm angiography at 1 year follow-ups will be obtained through DSA or MRA or CTA. | at 1 year post procedure | 
| Successful stent/coil placement rate | Successful stent/coil placement rate = number of target aneurysms with successful stent/coil placement ÷ total number of target aneurysms× 100%. Successful stent/coil placement is defined as successful stent deployment and successful delivery and placement of the coil at the target aneurysm assessed immediately post procedure through angiography. | immediately post procedure | 
| Aneurysm occlusion | Aneurysm occlusion rate = number of target aneurysms with Raymond-Roy Class I or II aneurysm occlusion÷ total number of target aneurysms× 100%. The aneurysm occlusion will be assessed by classifying the post-procedure immediate aneurysm occlusion shown in angiograms based on the Raymond-Roy Classification. | immediately post procedure, at 180 days and at 1 year post procedure | 
| Incidence of retreatment | Incidence of retreatment = number of target aneurysms receiving retreatment during the follow-up ÷ total number of target aneurysms receiving follow-up ×100%. Retreatment refers to any intervention to the target aneurysm after completing first stent-assisted coil embolization for the target aneurysm. | at 30 days, 180 days, 1 year, 2 years, 3 years, 4 years and 5 years post procedure | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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intracranial aneurysms, Neurovascular