Pilot Study of the CereVasc® eShunt® System in Normal Pressure Hydrocephalus

Study Overview
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Brief Summary
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The eShunt System includes proprietary delivery componentry and the eShunt Implant, a permanent implant deployed in a minimally invasive, neurointerventional procedure. The eShunt Implant is designed to mimic the function of the arachnoid granulations by draining excess cerebrospinal fluid (CSF) from the intracranial subarachnoid space (SAS) into the venous system.

Detailed Description
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This is a prospective, non-randomized, open-label, single-center, pilot study in subjects with normal pressure hydrocephalus for whom a traditional CSF shunt implant is indicated. Up to 30 subjects will receive the eShunt Implant at one investigational site. Subjects will return for five follow-up visits in the first year and then continue to attend visits every six months for five years post-implantation. The study objectives are to demonstrate safety of the eShunt Procedure, as well as demonstrate safety and efficacy of the eShunt Implant in a small sample of patients. Subjects will be followed long-term; primary analysis results will be used to support additional studies.

Official Title
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Pilot Study to Evaluate the Safety and Effectiveness of the CereVasc® eShunt® System in the Treatment of Normal Pressure Hydrocephalus

Conditions
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Hydrocephalus, Normal Pressure, Hydrocephalus

Intervention / Treatment
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* Device: eShunt Implant


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients 65-85 years old and traditional CSF shunt placement is indicated based upon a diagnostic NPH evaluation Patient is able and willing to provide written informed consent History or evidence of gait impairment duration ≥6 months Clinical presentation consistent with NPH including 2 or more of the clinical triad (i.e., history of gait disturbance, progressive mental deterioration, and urinary urgency or incontinence), together with: Brain MRI signs of ventricular enlargement disproportionate to cerebral atrophy (Evans Index >0.3) and the absence of severe hippocampal atrophy Pre-procedure spinal tap test with subsequent gait disturbance improvement (Timed Up and Go Test) of at least 20% CSF opening pressure ≥10 cmH2O Baseline cognitive evaluation assessed by Montreal Cognitive Assessment (MoCA) test score ≥12 Pre-procedure MRI confirmation of anatomy suitable for eShunt Procedure, as described in Section 1.8.3.4.2 and confirmed by SSC Pre-procedure CT confirmation of anatomy suitable for eShunt Procedure, as described in Section 1.8.3.4.2 and confirmed by SSC Exclusion Criteria: Unable to walk 10 meters (33 feet) with or without an assistive device Conditions impairing gait that are considered to be unrelated to hydrocephalus Signs or symptoms of obstructive hydrocephalus Active systemic infection or infection detected in CSF Prior or existing shunts, endoscopic third ventriculostomy, or any previous surgical intervention for hydrocephalus Hypersensitivity or contraindication to heparin or radiographic contrast agents which cannot be adequately pre-medicated, desensitized or where no alternative is available Occlusion or stenosis of the internal jugular vein Venous distension in the neck on physical exam Atrial septal defect or patent foramen ovale identified on cardiac echocardiogram History of bleeding diatheses, coagulopathy or will refuse blood transfusion in cases of emergency Stroke or transient ischemic attack within 180 days of eShunt Procedure Presence of a deep vein thrombosis superior to the popliteal vein International Normalized Ratio (INR) or Partial Thromboplastin Time (PTT) results outside of normal range (INR 0.8-1.4; PTT 25-35 seconds) Presence of a posterior fossa tumor or mass Life expectancy < 1 year Currently participating in another investigational drug or device trial that could conflict with study data collection or follow-up Other medical illnesses that may cause the patient to be non-compliant with the protocol or confound data interpretation Pregnant or planning to become pregnant Unwilling or unable to comply with follow-up requirements

Ages Eligible for Study
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Minimum Age: 65 Years
Maximum Age: 85 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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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Interventional Model Description: Single group assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Treatment Arm<br>The Treatment Arm receives the eShunt Implant. | Device: eShunt Implant<br>* The eShunt System consists of endovascular delivery componentry and a permanent implant intended to shunt cerebrospinal fluid from the intracranial subarachnoid space to the venous system in adults.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Device and/or procedure-related serious adverse events (SAEs) | Rate of occurrence of device and/or procedure-related serious adverse events (SAEs) | 90 days following eShunt Implant deployment | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of participants with abnormal MRI findings | Number of participants with abnormal MRI findings and descriptive summaries of findings | 90 days following eShunt Implant deployment | 
| Number of participants with abnormal CT findings | Number of participants with abnormal CT findings and descriptive summaries of findings | 90 days following eShunt Implant deployment | 
| Number of participants with clinically significant abnormal complete blood count (CBC) results | Number of participants with clinically significant abnormal results and descriptive summaries of CBC results | 90, 180 and 365 days following eShunt Implant deployment | 
| Number of participants with clinically significant abnormal blood chemistry results | Number of participants with clinically significant abnormal findings and descriptive summaries of blood chemistry results | 90, 180 and 365 days following eShunt Implant deployment | 
| Number of participants with clinically significant abnormal neurological exam findings | Number of participants with clinically significant abnormal findings and descriptive summaries of neurological exam finding | 90, 180 and 365 days following eShunt Implant deployment and at study completion | 
| Number of participants with adverse events | Tabulation of all adverse events | 90, 180 and 365 days following eShunt Implant deployment and at study completion | 
| Change in gait compared to baseline | Change in gait compared to baseline as measured by the duration in seconds of the Timed Up and Go Test (shorter durations indicate improvement (increased mobility)) | 90, 180 and 365 days following eShunt Implant deployment | 
| Change in cognitive ability compared to baseline | Change in cognitive ability compared to baseline as measured by Montreal Cognitive Assessment (MoCA) scores (scores range from 0-30; higher scores indicate improvement (less cognitive disability)) | 90, 180 and 365 days following eShunt Implant deployment | 
| Change in urinary symptoms compared to baseline | Change in urinary symptoms compared to baseline as measured by the Neurogenic Bladder Symptom Score (NBSS) (scores range from 0-28; lower scores indicate improvement (fewer symptoms)) | 90, 180 and 365 days following eShunt Implant deployment | 
| Change in Modified Rankin Scale compared to baseline | Change in degree of disability compared to baseline as measured by Modified Rankin Scale (mRS) scores (scores range from 0-6; lower scores indicate improvement (less disability)) | 90, 180 and 365 days following eShunt Implant deployment | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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eShunt, Minimally invasive shunt, Endovascular shunt