StrokeNet Thrombectomy Endovascular Platform

NCT ID: NCT06289985

Last Updated: 2025-12-04

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

1600 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-01-31

Study Completion Date

2030-01-31

Brief Summary

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STEP is a Randomized, Multifactorial, Adaptive Platform trial that seeks to optimize the care of patients with acute ischemic stroke (AIS) due to large (LVO) or medium vessel occlusions (MVO).

Detailed Description

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The StrokeNet Thrombectomy Endovascular Platform (STEP) is conducted within NIH StrokeNet at 38 comprehensive stroke centers across the US. The primary goal is to optimize all aspects of care of acute ischemic stroke patients with a large or a medium vessel occlusion. The platform trial operates under an overarching Master Protocol in an inferentially integrated framework. The platform trial is designed to support the studies of three broad categories of therapeutics: expansion of endovascular treatment (EVT) indications, innovative EVT devices and concomitant medical therapies, and novel pre- and early-hospital technologies and systems of care. As new interventions are put forth, they will be added to the Master Protocol as a new Domain or part of an existing Domain. STEP utilizes a flexible Bayesian design with frequent adaptive analyses to assess whether a given intervention is superior, inferior, or equivalent either within a Domain or for specific populations within the Domain.

Conditions

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Ischemic Stroke

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

FACTORIAL

Adaptive Bayesian Platform Trial evaluating multiple interventions in multiple domains.
Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Endovascular Therapy (EVT) Indication Expansion Domain: Low NIHSS Strata

Adult patients with acute cerebral ischemia within 24 hours of last known well who have large vessel occlusion (LVO) and mild deficits/low NIHSS (NIHSS 0-5) will be randomized to receive one of two strategies:

* Endovascular Therapy (EVT)
* Medical Management (MM)

Group Type OTHER

Endovascular thrombectomy with any FDA-approved category POL or NRY device

Intervention Type DEVICE

Endovascular thrombectomy with any FDA-approved category POL or NRY device - Neurovascular Mechanical Thrombectomy Device For Acute Ischemic Stroke Treatment (POL), and/or Catheter, Thrombus Retriever (NRY)

Medical Management

Intervention Type OTHER

Medical Management (MM) may involve any combination of the following: intravenous thrombolysis, antiplatelets, anti-hypertensives, cholesterol-lowering medications, and rehabilitative care.

Endovascular Therapy (EVT) Indication Expansion Domain: Medium/Distal Occlusions Strata

Adult patients with acute cerebral ischemia within 24 hours of last known who have Medium Vessel Occlusion (MVO) with Non-dominant/Co-dominant M2 occlusion or Distal Medium Vessel Occlusion (DMVO) patients with M3 occlusion will be randomized to receive one of two strategies:

* Endovascular Therapy (EVT)
* Medical Management (MM)

Group Type OTHER

Endovascular thrombectomy with any FDA-approved category POL or NRY device

Intervention Type DEVICE

Endovascular thrombectomy with any FDA-approved category POL or NRY device - Neurovascular Mechanical Thrombectomy Device For Acute Ischemic Stroke Treatment (POL), and/or Catheter, Thrombus Retriever (NRY)

Medical Management

Intervention Type OTHER

Medical Management (MM) may involve any combination of the following: intravenous thrombolysis, antiplatelets, anti-hypertensives, cholesterol-lowering medications, and rehabilitative care.

Interventions

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Endovascular thrombectomy with any FDA-approved category POL or NRY device

Endovascular thrombectomy with any FDA-approved category POL or NRY device - Neurovascular Mechanical Thrombectomy Device For Acute Ischemic Stroke Treatment (POL), and/or Catheter, Thrombus Retriever (NRY)

Intervention Type DEVICE

Medical Management

Medical Management (MM) may involve any combination of the following: intravenous thrombolysis, antiplatelets, anti-hypertensives, cholesterol-lowering medications, and rehabilitative care.

Intervention Type OTHER

Other Intervention Names

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EVT Endovascular Recanalization Therapy Endovascular Therapy

Eligibility Criteria

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Inclusion Criteria

1. Suspected diagnosis acute ischemic stroke
2. Likely causative intracranial large or medium vessel occlusion


1\. Age 18 years or older 2. Pre-stroke modified Rankin Scale score 0-2 3. Presentation to enrolling hospital within 24 hours of last known well/stroke onset 4. Able to initiate arterial puncture within 2 hours from qualifying CTA/MRA or CTP/MRP imaging

\*CT/MR and qualifying CTA/MRA or CTP/MRP should be repeated if more than 120 minutes have elapsed since the imaging and randomization has not been performed. The exception is for LVO Mild deficit/Low NIHSS 0-5 for which imaging would only need to be repeated if there has been significant improvement in the NIHSS prior to randomization.

5\. Has one of the following presentations:

1. LVO patients with mild deficits/low NIHSS (must have both):

1. Mild presenting neurologic deficits - NIHSS 0-5 (Must have some focal neurological deficit attributable to the target occlusion if NIHSS 0)
2. Complete occlusion of the intracranial Internal Carotid Artery (ICA) or M1 Middle Cerebral Artery (MCA)
2. Medium/Distal Vessel Occlusion:

1. Visualized complete occlusion or perfusion deficit (Tmax \> 4s) supportive of a cortical branch occlusion in one of the following vessels:

i) Non-dominant/Co-dominant M2 (defined as serving \< 50% of entire overall MCA territory) ii) M3
2. If symptom onset is \> 6h, the core must be less than 50% of the territory supplied by the occluded vessel as evident by either:

i) Hypodensity and loss of grey-white border on NCCT or ii)ADC \<620 mm2/s on diffusion MRI or rCBF\<30% on CTP
3. NIHSS \> =8

Exclusion Criteria

1. Proven contraindication to endovascular thrombectomy
2. Prisoners/incarcerated

DOMAIN-SPECIFIC ELIGIBILITY CRITERIA:

Each domain may have additional eligibility criteria.


1. Clinical

1. Presumed septic embolus; suspicion of bacterial endocarditis
2. Seizure at stroke onset or between onset and enrollment
3. Known anaphylactic reaction to contrast material that precludes endovascular reperfusion therapy
4. Intracranial occlusion suspected to be chronic, based on history and/or imaging
5. Intracranial dissection, based on history and/or imaging
6. Cerebral vasculitis, based on history and/or imaging
7. Known pregnancy
8. Known pre-existing medical, neurological or psychiatric disease that would confound the neurological or functional evaluations
9. Known serious, advanced, or terminal illness or life expectancy less than 6 months in the investigator judgment
10. Known or high suspicion for underlying intracranial atherosclerotic disease (ICAD)
2. Laboratory

a. Known platelet count \<100,000/uL
3. Imaging

1. CT ASPECT score \<6 (MRI ASPECT score \<7)
2. Unfavorable vascular anatomy that limits access to the occluded artery precluding endovascular reperfusion therapy.
3. Acute occlusions in multiple vascular territories (e.g., bilateral anterior circulation, or anterior/posterior circulation)
4. Tandem occlusions
5. Significant mass effect with midline shift (\>5mm)
6. Evidence of intra-cranial tumor (except small meningioma defined as (1) \<=3 cm, (2) asymptomatic) as confirmed on CT/MRI)
7. Evidence of acute intracranial hemorrhage
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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National Institute of Neurological Disorders and Stroke (NINDS)

NIH

Sponsor Role collaborator

University of Cincinnati

OTHER

Sponsor Role collaborator

University of Virginia

OTHER

Sponsor Role collaborator

Berry Consultants

OTHER

Sponsor Role collaborator

University of California, Los Angeles

OTHER

Sponsor Role collaborator

MOUNT SINAI HOSPITAL

OTHER

Sponsor Role collaborator

The Cooper Health System

OTHER

Sponsor Role collaborator

University of Pittsburgh Medical Center

OTHER

Sponsor Role collaborator

Stony Brook University

OTHER

Sponsor Role collaborator

University at Buffalo

OTHER

Sponsor Role collaborator

Medical University of South Carolina

OTHER

Sponsor Role lead

Responsible Party

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Jordan Elm

Research Professor-Faculty

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Jordan J Elm, PhD

Role: PRINCIPAL_INVESTIGATOR

Medical University of South Carolina

Eva A Mistry, MBBS, MSCI

Role: PRINCIPAL_INVESTIGATOR

University of Cincinnati

Pooja Khatri, MD

Role: PRINCIPAL_INVESTIGATOR

University of Cincinnati

Colin P Derdeyn, MD

Role: PRINCIPAL_INVESTIGATOR

University of Virginia

Jeffery L Saver, MD

Role: PRINCIPAL_INVESTIGATOR

University of California, Los Angeles

Tudor G Jovin, MD

Role: PRINCIPAL_INVESTIGATOR

The Cooper Health System

Raul G Nogueira, MD, FAHA

Role: PRINCIPAL_INVESTIGATOR

University of Pittsburgh

David Fiorella, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Stony Brook University

Adnan Siddiqui, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

University at Buffalo

J Mocco, MD, MS

Role: PRINCIPAL_INVESTIGATOR

MOUNT SINAI HOSPITAL

Locations

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University of Alabama Hospital

Birmingham, Alabama, United States

Site Status RECRUITING

UCSD Health La Jolla

La Jolla, California, United States

Site Status RECRUITING

Kaiser Permanente Los Angeles Medical Center

Los Angeles, California, United States

Site Status RECRUITING

Ronald Reagan UCLA Medical Center

Los Angeles, California, United States

Site Status RECRUITING

UCSD Medical Center - Hillcrest Hospital

San Diego, California, United States

Site Status RECRUITING

Stanford University Medical Center

Stanford, California, United States

Site Status RECRUITING

Hartford Hospital

Hartford, Connecticut, United States

Site Status RECRUITING

Yale New Haven Hospital

New Haven, Connecticut, United States

Site Status RECRUITING

Jackson Memorial Hospital

Miami, Florida, United States

Site Status RECRUITING

Tampa General Hospital

Tampa, Florida, United States

Site Status RECRUITING

Grady Memorial Hospital

Atlanta, Georgia, United States

Site Status RECRUITING

University of Chicago Medical Center

Chicago, Illinois, United States

Site Status RECRUITING

University of Iowa Hospitals & Clinics

Iowa City, Iowa, United States

Site Status RECRUITING

Brigham and Women's Hospital

Boston, Massachusetts, United States

Site Status RECRUITING

Boston Medical Center

Boston, Massachusetts, United States

Site Status RECRUITING

M Health Fairview Southdale Hospital

Edina, Minnesota, United States

Site Status RECRUITING

M Health Fairview University of Minnesota Medical Center

Minneapolis, Minnesota, United States

Site Status RECRUITING

Barnes Jewish Hospital

St Louis, Missouri, United States

Site Status RECRUITING

Cooper University Hospital

Camden, New Jersey, United States

Site Status RECRUITING

NYU Langone Hospital

Brooklyn, New York, United States

Site Status RECRUITING

Buffalo General Medical Center

Buffalo, New York, United States

Site Status RECRUITING

The Mount Sinai Hospital

New York, New York, United States

Site Status RECRUITING

Stony Brook University Hospital

Stony Brook, New York, United States

Site Status RECRUITING

Montefiore Medical Center

The Bronx, New York, United States

Site Status RECRUITING

Carolinas Medical Center

Charlotte, North Carolina, United States

Site Status RECRUITING

Wake Forest Baptist Medical Center

Winston-Salem, North Carolina, United States

Site Status RECRUITING

University of Cincinnati Medical Center

Cincinnati, Ohio, United States

Site Status RECRUITING

UH Cleveland Medical Center

Cleveland, Ohio, United States

Site Status RECRUITING

Cleveland Clinic

Cleveland, Ohio, United States

Site Status RECRUITING

OSU Wexner Medical Center

Columbus, Ohio, United States

Site Status RECRUITING

Hospital of the University of Pennsylvania

Philadelphia, Pennsylvania, United States

Site Status RECRUITING

UPMC Presbyterian Hospital

Pittsburgh, Pennsylvania, United States

Site Status RECRUITING

UPMC Mercy Hospital

Pittsburgh, Pennsylvania, United States

Site Status RECRUITING

Rhode Island Hospital

Providence, Rhode Island, United States

Site Status RECRUITING

Medical University of South Carolina University Hospital

Charleston, South Carolina, United States

Site Status RECRUITING

Memorial Hermann Texas Medical Center

Houston, Texas, United States

Site Status RECRUITING

Medical City Plano

Plano, Texas, United States

Site Status RECRUITING

University of Texas Health Science Center

San Antonio, Texas, United States

Site Status RECRUITING

University of Utah Healthcare

Salt Lake City, Utah, United States

Site Status RECRUITING

UVA Medical Center

Charlottesville, Virginia, United States

Site Status RECRUITING

Harborview Medical Center

Seattle, Washington, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Jordan Elm

Role: CONTACT

843-876-1605

Other Identifiers

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1OT2NS129366-01

Identifier Type: NIH

Identifier Source: secondary_id

View Link

STEP

Identifier Type: -

Identifier Source: org_study_id

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