Clinical trial Recruiting at 27 sites Interventional Ages 18 and up

Evaluating the long-term safety and effectiveness of the WEB device for treating wide neck bifurcation intracranial aneurysms

Official title: Post-Approval Study - Post-Market Surveillance Study to Evaluate the Long-Term Safety and Effectiveness of the WEB Device

Run by Microvention-Terumo, Inc. · NCT04839705 · Data updated 2026-11-12

This study is testing if the WEB device is a safe and effective way to treat wide neck bifurcation brain aneurysms in adults over the long term.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment200 (estimated)
SponsorMicrovention-Terumo, Inc.
Industry-sponsored
Locations29 sites (Hollywood, Florida and 28 other locations)
StatusRecruiting
StartedAugust 24, 2022
Main results expectedMay 8, 2027
Study endsMay 7, 2031
Registry record updatedNovember 10, 2026
Trial IDNCT04839705 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are adults aged 18 and older with a single ruptured or unruptured intracranial aneurysm that requires treatment.

Probably not a fit

Patients with aneurysms unsuitable for endovascular treatment or those with recent ischemic symptoms may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This interventional study aims to assess the long-term safety and effectiveness of the WEB device in treating wide neck bifurcation intracranial aneurysms in adult patients. It is a prospective, multicenter, single-arm study that will evaluate the adequacy of aneurysm occlusion one year after treatment, as determined by a core laboratory. Participants will include adults with either ruptured or unruptured aneurysms requiring treatment, and they will be monitored for safety and effectiveness outcomes over time.

Why it matters

Potential benefit: If successful, this study could provide a safer and more effective treatment option for patients with wide neck bifurcation intracranial aneurysms.

How similar studies have gone: Other studies have shown promising results with similar endovascular approaches, indicating potential for success in this study.

Who can join: the full rules

Show full inclusion / exclusion criteria
Key Inclusion Criteria:

* Patient must be ≥ 18 at the time of screening
* Patient must have a single ruptured or unruptured IA requiring treatment
* Patient must sign and date an IRB-approved written informed consent prior to initiation of any study procedures

Key Exclusion Criteria:

* Patient has an IA with characteristics unsuitable for endovascular treatment
* Patient has conditions placing them at high risk for ischemic stroke or has exhibited ischemic symptoms such as transient ischemic attacks, minor strokes, or stroke-in-evolution within the prior 30 days
* Patient has had an SAH from a non-index IA or any other intracranial hemorrhage within 90 days
* Patient's index IA was previously treated
* Patient is pregnant

Where it's running

  • Memorial Health Systems
    Hollywood, Florida, United States
    Recruiting
  • Orlando Health Neuroscience Institute
    Orlando, Florida, United States
    Recruiting
  • The Queen's Medical Center Neuroscience Institute
    Honolulu, Hawaii, United States
    Recruiting
  • University of Iowa Hospitals and Clinics
    Iowa City, Iowa, United States
    Recruiting
  • University of Kansas Health System
    Kansas City, Kansas, United States
    Recruiting
  • Baptist Health Systems
    Lexington, Kentucky, United States
    Recruiting
Show 23 more locations
  • University of Kentucky, Department of Neurosurgery
    Lexington, Kentucky, United States
    Recruiting
  • Norton Healthcare
    Louisville, Kentucky, United States
    Recruiting
  • LSU Health Sciences Center at Shreveport
    Shreveport, Louisiana, United States
    Recruiting
  • Johns Hopkins University
    Baltimore, Maryland, United States
    Recruiting
  • Massachusetts General Brigham Incorporated
    Boston, Massachusetts, United States
    Recruiting
  • UMass Memorial Health
    Worcester, Massachusetts, United States
    Recruiting
  • Abbott Northwestern Hospital Allina Health
    Minneapolis, Minnesota, United States
    Recruiting
  • The Washington University
    St Louis, Missouri, United States
    Recruiting
  • Albany Medical Center
    Albany, New York, United States
    Recruiting
  • University of Buffalo
    Buffalo, New York, United States
    Recruiting
  • Northshore University Hospital/Northwell Health
    Manhasset, New York, United States
    Recruiting
  • SUNY Stony Brook
    Stony Brook, New York, United States
    Recruiting
  • Montefiore Medical Center
    The Bronx, New York, United States
    Recruiting
  • Ohio State University
    Columbus, Ohio, United States
    Recruiting
  • OhioHealth Research Institute
    Columbus, Ohio, United States
    Recruiting
  • The Toledo Hospital d/b/a ProMedica Toledo Hospital
    Toledo, Ohio, United States
    Recruiting
  • University of Oklahoma Health Sciences Center
    Oklahoma City, Oklahoma, United States
    Recruiting
  • University of Pennsylvania Health Systems
    Philadelphia, Pennsylvania, United States
    Recruiting
  • Thomas Jefferson University Hospital
    Philadelphia, Pennsylvania, United States
    Recruiting
  • Semmes Murphey
    Memphis, Tennessee, United States
    Recruiting
  • West Virginia University
    Morgantown, West Virginia, United States
    Recruiting
  • University of Maryland, Baltimore
    Baltimore, Maryland, United States
    Withdrawn
  • Duke University
    Durham, North Carolina, United States
    Withdrawn

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.