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Trial record 3 of 3 for:    ROADSTER

The ENROUTE Transcarotid Neuroprotection System (ENROUTE Transcarotid NPS) DW-MRI Evaluation (DW-MRI-US)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03982420
Recruitment Status : Recruiting
First Posted : June 11, 2019
Last Update Posted : September 21, 2021
Information provided by (Responsible Party):
Silk Road Medical

Tracking Information
First Submitted Date June 6, 2019
First Posted Date June 11, 2019
Last Update Posted Date September 21, 2021
Actual Study Start Date June 27, 2019
Estimated Primary Completion Date January 2022   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures
 (submitted: June 10, 2019)
Incidence of ipsilateral new white lesions [ Time Frame: 30 days ]
Incidence of ipsilateral new white lesions from baseline (pre-procedure) by DW-MRI to 30 days post procedure
Original Primary Outcome Measures Same as current
Change History
Current Secondary Outcome Measures
 (submitted: June 10, 2019)
  • Incidence of Periprocedural SAEs [ Time Frame: 30 days ]
    All stroke, Neurological Death, Stroke/Neurological Death in patients eligible for ROADSTER 2, Stroke/Neurological Death in patients ineligible for ROADSTER 2
  • Rate of contralateral new white lesions by DW-MRI [ Time Frame: 30 days ]
Original Secondary Outcome Measures Same as current
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title The ENROUTE Transcarotid Neuroprotection System (ENROUTE Transcarotid NPS) DW-MRI Evaluation
Official Title The ENROUTE Transcarotid Neuroprotection System (ENROUTE Transcarotid NPS) DW-MRI Evaluation
Brief Summary The goal of this evaluation is to document the incidence of post procedure DW-MRI lesions (relative to baseline) in patients treated with the transcarotid artery revascularization (TCAR) procedure.
Detailed Description

This is a prospective, single-arm, multi-center evaluation of patients requiring carotid revascularization who are treated with the FDA-cleared ENROUTE Transcarotid NPS in conjunction with the FDA-approved ENROUTE Transcarotid Stent System. Both the ENROUTE Transcarotid NPS and ENROUTE Transcarotid Stent System have received CE mark and are commercially available in the European Union.

Patients enrolled in this study will have been offered the TCAR intervention as part of standard of care for the treatment of carotid artery stenosis, regardless of whether or not they agree to be in the study. Therefore, the act of participation in this procedure will not be the determining factor in whether or not the patient receives the TCAR treatment. Subject participation means they agree to undergo two additional DW-MRI imaging procedures immediately after the procedure and at 30 days to determine whether there is an increase in new white lesions. Any other procedure other than the active collection of consent and data by the sponsor is standard of care for the treatment of carotid artery stenosis.

These patients will be monitored to document the incidence of post procedure DW-MRI lesions (relative to baseline).

Study Type Observational
Study Design Observational Model: Case-Only
Time Perspective: Prospective
Target Follow-Up Duration Not Provided
Biospecimen Not Provided
Sampling Method Non-Probability Sample
Study Population Patients participating in this evaluation will be comprised of male and female symptomatic or asymptomatic patients requiring carotid revascularization.
  • Carotid Artery Diseases
  • Carotid Atherosclerosis
  • Carotid Stenosis
  • Carotid Artery Plaque
  • Carotid Disease
Intervention Procedure: Transcarotid Revascularization (TCAR)
Carotid revascularization treated with the FDA-cleared ENROUTE Transcarotid NPS in conjunction with the FDA-approved ENROUTE Transcarotid Stent
Other Name: Carotid Revascularization, Carotid Artery Stenting
Study Groups/Cohorts Not Provided
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status Recruiting
Estimated Enrollment
 (submitted: June 10, 2019)
Original Estimated Enrollment Same as current
Estimated Study Completion Date January 2022
Estimated Primary Completion Date January 2022   (Final data collection date for primary outcome measure)
Eligibility Criteria

Inclusion Criteria:

  • Stenosis must be >50% as determined by ultrasound or angiogram1 and the patient has a history of stroke (minor or non-disabling; NIHSS ≤4 or mRS ≤2), TIA and/or amaurosis fugax within 180 days of the procedure ipsilateral to the carotid artery to be stented.
  • Stenosis must be >80% as determined by ultrasound or angiogram without any neurological symptoms within the prior 180 days.
  • Target vessel must meet diameter requirements for stent (refer to stent IFU for diameter requirements).
  • Patient has a discrete lesion located in the internal carotid artery (ICA) with or without involvement of the contiguous common carotid artery (CCA).
  • Patient is willing to comply with the protocol requirements and return to the treatment center for all required clinical evaluations.
  • Patient must have a life expectancy ≥ 3 years at the time of the index procedure without contingencies related to other medical, surgical or endovascular intervention.
  • Patient meets at least one of the surgical high-risk criteria listed in CMS National Coverage Determination (NCD) for Percutaneous Transluminal Angioplasty (20.7)

Exclusion Criteria

  • Alternative source of cerebral embolus
  • Patient has chronic atrial fibrillation.
  • Patient has had any episode of paroxysmal atrial fibrillation within the past 6 months, or history of paroxysmal atrial fibrillation requiring chronic anticoagulation.
  • Knowledge of cardiac sources of emboli. e.g. left ventricular aneurysm, intracardiac filling defect, cardiomyopathy, aortic or mitral prosthetic heart valve, calcific aortic stenosis, endocarditis, mitral stenosis, atrial septal defect, atrial septal aneurysm, or left atrial myxoma).
  • Recently (<60 days) implanted heart valve (either surgically or endovascularly), which is a known source of emboli as confirmed on echocardiogram.
  • Abnormal angiographic findings: ipsilateral intracranial or extracranial arterial stenosis (as determined by angiography or CTA/MRA ≤ 6 months prior to index procedure) greater in severity than the lesion to be treated, cerebral aneurysm > 5 mm, AVM (arteriovenous malformation) of the cerebral vasculature, or other abnormal angiographic findings.
  • Patient has a history of spontaneous intracranial hemorrhage within the past 12 months, or has had a recent (<7 days) stroke of sufficient size (on CT or MRI) to place him or her at risk of hemorrhagic conversion during the procedure (less than one-third middle cerebral artery volume).
  • Patient had hemorrhagic transformation of an ischemic stroke within the past 60 days.
  • Patient with a history of major stroke attributable to either carotid artery (CVA or retinal embolus) with major neurological deficit (NIHSS ≥ 5 OR mRS ≥ 3) likely to confound study endpoints within 1 month of index procedure.
  • Patient has an evolving stroke.
  • Patient has an intracranial tumor.
  • Patient has neurologic illnesses within the past two years characterized by fleeting or fixed neurologic deficit which cannot be distinguished from TIA or stroke, including but not limited to: moderate to severe dementia, partial or secondarily generalized seizures, complicated or classic migraine, tumor or other space-occupying brain lesions, subdural hematoma, cerebral contusion or other post-traumatic lesions, intracranial infection, demyelinating disease, or intracranial hemorrhage).
  • Patient has had a TIA or amaurosis fugax within 48 hrs prior to the procedure.
  • Patient has an isolated hemisphere defined as the ipsilateral middle cerebral artery being supplied only by the ipsilateral internal carotid artery.
  • Patient has active bleeding diathesis or coagulopathy or will refuse blood transfusion.
  • Patient had or will have CABG, endovascular stent procedure, valve intervention or vascular surgery within 30 days before or after the intervention.
  • Myocardial Infarction within 72 hours prior to the intervention.
  • Occlusion of the ipsilateral common or internal carotid artery.
  • An intraluminal filling defect (defined as an endoluminal lucency surrounded by contrast, seen in multiple angiographic projections, in the absence of angiographic evidence of calcification) whether or not it is associated with an ulcerated target lesion.
  • Patients with carotid string sign (a very high-grade carotid stenosis to the skull base with a long, thin, barely visible string of contrast within the true lumen of the artery.).
  • Ostium of Common Carotid Artery (CCA) requires revascularization (>50% stenosis).
  • Patient has an open stoma in the neck.
  • Patients with hostile necks due to prior neck irradiation
  • Female patients who are pregnant
  • Patient has history of intolerance or allergic reaction to any of the study medications or stent materials (refer to stent IFU), including aspirin (ASA), ticlopidine, clopidogrel, prasugrel, statin or contrast media (that can't be pre medicated). Patients must be able to tolerate statins and a combination of ASA and ticlopidine, ASA and clopidogrel or ASA and prasugrel.
  • Patient has a life expectancy <3 years with contingencies related to other medical, surgical, or interventional procedures as per the Wallaert Score and patients with primary, recurrent or metastatic malignancy who do not have independent assessment of life expectancy performed by the treating oncologist or an appropriate specialist other than the physician performing TCAR.
  • Patient has had a recent GI bleed that would interfere with antiplatelet therapy.
  • Patient is actively participating in an investigational drug or device trial (IND or IDE) that has not completed the required protocol follow-up period.
  • Patient has inability to understand and cooperate with study procedures.
  • Presence of extensive or diffuse atherosclerotic disease involving the proximal common carotid artery that would preclude the safe introduction of the study device.
  • Patient is otherwise unsuitable for intervention in the opinion of the physician.
  • Patients who cannot have MRI due to metallic implants (e.g. orthopedic implants, pacemakers, etc.)
Sexes Eligible for Study: All
Ages 18 Years and older   (Adult, Older Adult)
Accepts Healthy Volunteers No
Contact: Exec. VP, Clinical Affairs 408-585-2112
Listed Location Countries Spain,   United States
Removed Location Countries  
Administrative Information
NCT Number NCT03982420
Other Study ID Numbers SRM-2018-01
Has Data Monitoring Committee No
U.S. FDA-regulated Product
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: Yes
Product Manufactured in and Exported from the U.S.: No
IPD Sharing Statement
Plan to Share IPD: Undecided
Plan Description: Results will be published following study end date.
Responsible Party Silk Road Medical
Study Sponsor Silk Road Medical
Collaborators Not Provided
Investigators Not Provided
PRS Account Silk Road Medical
Verification Date September 2021