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| General |
| Study Status |
Ongoing |
Application Number /
Requirement Number |
P140026 S016/ PAS001 |
| Date Original Protocol Accepted |
04/28/2022
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| Date Current Protocol Accepted |
07/20/2023
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| Study Name |
ROADSTER 3 PAS
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| Device Name |
ENROUTE Transcarotid Stent System
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| General Study Protocol Parameters |
| Study Design |
Prospective Cohort Study
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| Data Source |
New Data Collection
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| Comparison Group |
Objective Performance Criterion
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| Analysis Type |
Analytical
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| Study Population |
Transit. Adolescent A (distinctively) : 18-21 yrs,
Transit. Adolescent B (as adults) : 18-21 yrs,
Adult: >21
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| Detailed Study Protocol Parameters |
| Study Objectives |
Open label, single arm, multicenter study; To evaluate real world usage of the ENROUTE Transcarotid Stent System (ENROUTE TSS) when used in conjunction with the ENROUTE Transcarotid Neuroprotection System (ENROUTE NPS) in patients at standard risk for adverse events from carotid endarterectomy (CEA).
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| Study Population |
Patients at standard risk for complications from CEA with atherosclerotic
extracranial internal carotid artery (ICA) stenosis with or without involvement of the contiguous common artery (CCA) determined by duplex ultrasound, CT/CTA, MR/MRA or angiography. Patients must meet one of the following criteria regarding neurological symptom status and degree of stenosis:
Symptomatic (greater than or equal to 70% stenosis of the common or internal carotid artery by ultrasound or greater than or equal to 50% stenosis of the common or internal carotid artery by angiogram), OR
Asymptomatic (greater than or equal to 70% stenosis of the common or internal carotid artery by ultrasound or greater than or equal to 60% stenosis of the common or internal carotid artery by angiogram)
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| Sample Size |
No. of subjects: A maximum of 400 patients treated per protocol.
No. of sites: A minimum of 30 and up to a maximum of 60 sites.
Sites location: US
Assumptions for Sample Size Estimation:
Primary Endpoint
Assumed Incidence – 4%
Priori threshold – 8%
Power – 80%
Nominal alpha – 2.5%
Calculated sample size is 315
Key Secondary Endpoint
Incidence of cranial nerve injury within 30 days of the index procedure
Assumed incidence – 0.5%
Priori threshold – 2.7% (reported from VQI standard risk patients, )
Nominal alpha -2.5%
Power -80%
Calculated Sample size is 300
The testing strategy is to reject 2.7% with 97.5% confidence
To account for the larger of the 2 calculated sample sizes, a maximum of 400 patients will be enrolled.
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| Key Study Endpoints |
Safety Endpoints
Primary:
Hierarchical composite of Major Adverse Events (MAEs) defined as any death, stroke, or myocardial infarction (MI) within 30 days of the index procedure and ipsilateral stroke within 31 days to 365 days of the index procedure.
Key Secondary Endpoints:
Incidence of cranial nerve injury within 30 days of the index procedure
Other Key Secondary Endpoints:
Stroke within 30 days of the index procedure
Death within 30 days of the index procedure
MI within 30 days of the index procedure
Stroke/Death/MI within 30 days of the index procedure
Ipsilateral stroke at 1 year
Additional secondary endpoints:
Persistent cranial nerve injury at 6 months and 1 year
Rate of cardiac death within 30 days of the index procedure
Rate of neurological death within 30 days of the index procedure
Rate of hierarchical ipsilateral stroke, death, and MI within 30 days of the index procedure
Cardiac death at 1 year of patients who experienced an MI within 30 days of the index procedure
Access site complications (arterial/venous)
Serious Hematoma/bleeding complications (arterial/venous access site)
Rate of stent thrombosis or occlusion within 30 days of the index
Procedure
Rate of dissection within 30 days of the index procedure (during index procedure or a reintervention procedure)
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| Follow-up Visits and Length of Follow-up |
1 year
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| Interim or Final Data Summary |
| Interim Results |
Safety Results
Primary Endpoint
In the first 20% of per protocol patients enrolled (63 patients), there have been no reports of major adverse events (i.e., stroke, death, MI) within 30 days of the index procedure or reports of ipsilateral stroke within 31 to 365 days of the index procedure. Secondary Endpoint In the first 20% of per protocol patients enrolled (63 patients), and 30-day follow-up visit completed, there have been no reports of the secondary endpoint adverse events in this interim analysis (i.e., cranial nerve injury access site complications, serious hematoma/bleeding complications, stent thrombosis or occlusions, dissections, ipsilateral stroke at 1 year).
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| Actual Number of Patients Enrolled |
179 (total per protocol treated subjects)
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| Actual Number of Sites Enrolled |
53
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| Patient Follow-up Rate |
Follow-up rates below are based on all enrolled subjects (N=179)
30-Day Follow-up Visit: 165 (92.2%) subjects completed this visit and 14 (7.8%) subjects are pending the visit. 1-Year Follow-up Visit: 4 (2.2%) subjects completed this visit and exited the study; 175 (97.8%) subjects are pending the visit. There has been no (0, 0.0%) lost to follow -up.
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| Final Safety Findings |
Endpoint events adjudicated by the CEC are reported below:
Primary Endpoint (N=158 Subjects):
In the first 50% of per protocol subjects enrolled, one (1, 0.6%) subject experienced a major adverse event (stroke) within 30 days of the index procedure. There have been no reports of death, MI, or ipsilateral stroke within 31 to 365 days of the index procedure.
Secondary Endpoints (N=158 Subjects): In the first 50% of per protocol subjects enrolled, one (1, 0.6%) subject experienced a cranial nerve injury within 30 days of index procedure. Three (3, 1.9%) subjects experienced an arterial dissection during the index procedure and no dissections were reported during a reintervention procedure. There have been no (zero) reports of access site complications, serious hematoma/bleeding complications, stent thrombosis or occlusions.
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| Final Effect Findings |
Same as safety
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