NeoCast Embolic SystemOnyx LES, an FDA-Approved Commercial Liquid Embolic
NeoCast Embolic System: NeoCast will be used to embolize a participant's middle meningeal artery in an endovascular procedure before or after adjunctive surgery to drain the hematoma
Onyx LES, an FDA-Approved Commercial Liquid Embolic: Onyx LES, an FDA-approved commercial liquid embolic, will be used to embolize a participant's middle meningeal artery in an endovascular procedure before or after adjunctive surgery to drain the hematoma
Study summary
The purpose of this study is to evaluate the safety and efficacy of embolization of the middle meningeal artery (MMA) using the NeoCast Embolic System for treatment of symptomatic subacute or chronic subdural hematoma (SDH) adjunctive to surgery.
Eligibility
Sex
ALL
Min age
18 Years
Max age
90 Years
Healthy volunteers
No
Inclusion Criteria:
* Participant whose age is ≥ 18 and ≤ 90 years;
* Pre-morbid mRS ≤ 2;
* Confirmed diagnosis of subacute or chronic subdural hematoma that measures ≥10 mm in greatest thickness;
* Participant presents with one or more of the following corroborating neurological symptoms: headache; cognitive decline; speech difficulty; gait impairment or imbalance; focal neurological deficit; and/or seizure, within the last 30 days;
* Participant is planned for middle meningeal artery embolization within ±7 days of surgical evacuation of hematoma via burr hole or craniotomy;
* Participant or Legally Authorized Representative/Person Responsible for consenting on their behalf understands the nature of the procedure, consents to participation in the study and provides a signed informed consent form;
* Participant (woman of child-bearing potential) with a current negative pregnancy test who has agreed to an appropriate method of contraception throughout the trial;
* Participant is willing to return to the investigational site for follow-up visits.
Exclusion Criteria:
* Diagnosed with acute SDH
* Participant with prior embolization of either MMA
* Participant with urgent or emergent (within 1 hour of assessment) subdural hematoma evacuation needed
* Participant with bilateral SDH where both sides require surgery or contralateral SDH \>5mm in greatest thickness
* Participant identified with potentially dangerous anatomic variations leading to increased procedural risk, risk of incomplete embolization, or unsafe access for MMA embolization (i.e., MMA originating from ophthalmic artery)
* Participant who presents with a meningioma ≥1 cm or \< 1 cm with mass effect
* Subjects with conditions placing them at high-risk for ischemic stroke who cannot be taken off anticoagulants for at least 7 days post-surgery
* Participant currently undergoing radiation therapy for carcinoma or sarcomas of the head or neck region
* SDH developed due to underlying condition or structure pathology (e.g., dural AV fistula, AVM, tumor, arachnoid cyst, ventriculoperitoneal shunt, spontaneous intracranial hypotension or previous craniotomy)
* Presumed microbial superinfection
* Participant who is breastfeeding
* Participant with life expectancy of \<1 year
* Participants with acute renal impairment that the investigator assesses could be at risk for contrast induced nephropathy
* Participant with a life-threatening allergy to radiographic contrast (unless treatment for allergy is tolerated or can be managed medically)
* Participant is allergic to any of the materials used in the NeoCast device or the Onyx LES commercial embolic device
* Participant who is currently participating or planning to participate within 6 months in another clinical research study
Primary outcome measure(s)
Comparison of NeoCast arm vs. Onyx LES arm for a composite endpoint of treatment failure events — 90 Days post-treatment The Primary Effectiveness Endpoint is a non-inferiority comparison of the NeoCast and Onyx LES groups for treatment failure as defined by the occurrence of any of the following events:
1. Residual or re-accumulation of the SDH (≥10 mm) on 90-day scan post-treatment (assessed by a blinded, independent Imaging Core Lab);
2. Re-operation (after index procedure) or surgical rescue within 90 days post-treatment (CEC adjudicated);
3. Any new, major disabling stroke, myocardial infarction (MI) or death from any (neurological) cause within 90 days post-treatment (CEC adjudicated)
Safety Outcomes including Device-related or Procedure-related Serious Adverse Events — 180 days post-treatment CEC-adjudicated safety outcomes in both arms including:
* Incidence of device-related Serious Adverse Events
* Incidence of embolization procedure-related Serious Adverse Events
* Incidence of device-related neurological deaths or disabling strokes within 30 days of embolization procedure
* Incidence of device-related Adverse Events
Trial sites (2)
Facility
City
Region
Status
Yale Neurosciences Institute
New Haven
Connecticut
University of Washington Medicine - Harborview Medical Center
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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