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Sponsors and Collaborators: |
National Institute of Neurological Disorders and Stroke (NINDS) University of California, Los Angeles |
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Information provided by: | National Institute of Neurological Disorders and Stroke (NINDS) |
ClinicalTrials.gov Identifier: | NCT00389467 |
The purpose of this study is to compare the effectiveness of treating acute ischemic stroke with the Merci Retriever (mechanical embolectomy) within 8 hours of symptom onset to standard medical treatment, and to identify people who might benefit from the Merci device by the appearance of the stroke on MRI.
Condition | Intervention | Phase |
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Stroke |
Procedure: Merci Retriever |
Phase II |
Study Type: | Interventional |
Study Design: | Treatment, Randomized, Single Blind (Outcomes Assessor), Active Control, Parallel Assignment, Efficacy Study |
Official Title: | Magnetic Resonance and Recanalization of Stroke Clots Using Embolectomy |
Estimated Enrollment: | 120 |
Study Start Date: | May 2004 |
Estimated Study Completion Date: | May 2009 |
Estimated Primary Completion Date: | May 2009 (Final data collection date for primary outcome measure) |
Arms | Assigned Interventions |
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1: Active Comparator
Participants will be randomized to receive treatment either with the Merci Retriever and standard medical care or standard medical care alone.
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Procedure: Merci Retriever
The MERCI Retriever consists of a flexible, nickel titanium (nitinol) wire with a helical-shaped distal tip. The helical distal tip is covered with a platinum radiopaque coil, which facilitates fluoroscopic visualization. The body of the MERCI Retriever is covered with a hydrophilic coating that helps facilitate device placement. The MERCI Retriever is available in 6 configurations (Merci Retrievers X5, X6, L5, L4, L6, Retriever K Mini).
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2: No Intervention
standard medical care
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Stroke most commonly occurs when there is a blockage of blood flow to one of the arteries in the brain. The blockage is often caused by a clot. There is currently only one FDA-approved stroke treatment. However, only 2 percent of ischemic stroke patients receive this treatment because it must be given within 3 hours of the stroke onset. There is an overwhelming need for new treatments that extend the time window to treatment since most individuals with stroke arrive at the hospital after the 3-hour time window.
One of the most promising new devices is the Merci Retriever, a tiny corkscrew device designed to remove clots from arteries and thereby restore blood flow to the brain.
The primary purpose of this study is to compare the effectiveness of treatment with the Merci Retriever within 8 hours of symptom onset to standard medical treatment, and to identify people who might benefit from the device by the appearance of the stroke on magnetic resonance imaging (MRI). Previous testing has determined that the use of the Merci Retriever is successful in opening up blocked blood vessels in approximately ½ of the individuals in whom it is used.
A total of 120 participants from approximately 30 different medical centers will be enrolled into this study. Participants will be randomized to receive treatment either with the Merci Retriever and standard medical care or standard medical care alone. Standard care for stroke patients may include intravenous fluid, careful regulation of blood pressure, blood-thinning medicine (such as heparin or warfarin), anti-platelet medicine (such as aspirin or clopidogrel), and rehabilitation therapies.
Participants receiving the Merci Retriever will have a cerebral arteriogram with pictures taken with dye prior to the procedure to determine the location of the blockage, and following the procedure to determine if blood supply has been restored. The total Merci Retriever procedure will take approximately 1 to 2 hours. Participants will have brief neurological exams several times during this time to monitor changes in their neurological condition.
Participants will have follow-up visits, including neurological exams, at 30 days and at 90 days.
This study is part of the Specialized Program of Translational Research in Acute Stroke (SPOTRIAS), which allows researchers to enhance and initiate translational research that ultimately will benefit stroke patients by treating more patients in less than 2 hours, and finding ways to treat additional patients later.
Ages Eligible for Study: | 18 Years to 85 Years |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
Exclusion Criteria:
NOTE: **A GFR should be calculated on patients with the following risk factors:
Contact: Judy Guzy, RN | 310-794-0600 |
United States, California | |
University of California at Los Angeles, UCLA Stroke Network, 924 Westwood Blvd #300 | Recruiting |
Los Angeles, California, United States, 90024 | |
Contact: Judy Guzy 310-794-0600 | |
University of California at San Diego, UCSD Medical Center, 200 W. Arbor Drive, OPC, 3rd Floor Suite 3 | Recruiting |
San Diego, California, United States, 92103 | |
Contact: Nancy Kelly 619-471-0333 | |
United States, District of Columbia | |
Georgetown University, Georgetown University Hospital, Room GG012, Ground Floor Gorman, 3800 Reservoir Road, NW | Recruiting |
Washington, District of Columbia, United States, 20007 | |
Contact: Margy McCullough 202-687-5396 | |
Washington Hospital Center, East Building Room 6126, 110 Irving Street, NW | Recruiting |
Washington, District of Columbia, United States, 20010 | |
Contact: Lizbeth Keller 202-877-3118 | |
United States, Maryland | |
Suburban Hospital, NINDS Section on Stroke Diagnostics and Therapeutics, 10 Center Drive, Room B1D733 | Recruiting |
Bethesda, Maryland, United States, 20892 | |
Contact: Lisa Davis 301-435-7659 | |
United States, Massachusetts | |
Boston University, One Boston Medical Center Place, Department of Neurology, C329 | Recruiting |
Boston, Massachusetts, United States, 01228 | |
Contact: Helena Lau 617-414-1171 | |
Massachusetts General Hospital, 101 Huntington Ave Ste 300 | Recruiting |
Boston, Massachusetts, United States, 02199 | |
Contact: Shihab Masrur 617-724-4941 | |
United States, Michigan | |
Bronson Methodist Hospital, 301 John Street, Box 92 | Recruiting |
Kalamazoo, Michigan, United States, 49007 | |
Contact: Karen Bergman 269-341-7587 | |
United States, Missouri | |
St. Louis University Hospital, 3635 Vista Avenue at Grand Boulevard Saint Louis, MO | Recruiting |
St. Louis, Missouri, United States, 63110 | |
Contact: Eve Holzemer 314-977-4871 | |
United States, New York | |
Albany Medical Center, Albany Medical College, MC-70, 47 New Scotland Ave | Recruiting |
Albany, New York, United States, 12208 | |
Contact: Linda Graca 518-262-5868 | |
Columbia University, 710 W 168th St, NI 551, , | Recruiting |
New York, New York, United States, 10032 | |
Contact: Juan Rivolta 212-342-1491 | |
Cornell University, New York Presbyterian Hospital, Cornell Campus, 525 East 68th St, Box 141 | Recruiting |
New York, New York, United States, 10021 | |
Contact: Kim Salvaggio 212-746-4998 | |
United States, North Carolina | |
Guilford Neurologic Associates, Moses Cone Hospital, 1126 Church Street, Ste 200 | Recruiting |
Greensboro, North Carolina, United States, 27401 | |
Contact: Patricia Henderson 336-273-2511 ext 138 | |
United States, Ohio | |
University of Cincinnati, Department of Neurology, University of Cincinnati Medical Center, 231 Albert Sabin Way, Medical Sciences Bldg, Rm 4015, PO Box 670525 | Recruiting |
Cincinnati, Ohio, United States, 45267 | |
Contact: Janice Carrozzella 513-475-8793 | |
Ohio State University Medical Center, Stroke Office Room 401, Department of Neurology, 1654 Upham Drive | Recruiting |
Columbus, Ohio, United States, 43210 | |
Contact: Peggy Notestine 614-293-4975 | |
United States, Pennsylvania | |
Allegheny Singer Research Institute, 320 East North Avenue | Recruiting |
Pittsburgh, Pennsylvania, United States, 15212 | |
Contact: Andrew Ku 412-359-3946 | |
University of Pittsburgh, PUHC-426, 200 Lothrop Street | Recruiting |
Pittsburgh, Pennsylvania, United States, 15213 | |
Contact: Jenn Oakley 412-647-1618 | |
United States, Tennessee | |
Chattanooga Center for Neurologic Research, 721 Glenwood Drive, 467 West | Recruiting |
Chattanooga, Tennessee, United States, 37404 | |
Contact: Tammi Owen 426-648-0304 | |
Vanderbilt University Hospital, 3319 West End Avenue | Recruiting |
Nashville, Tennessee, United States, 37203 | |
Contact: Diane Brown 615-936-0062 | |
United States, Texas | |
University of Texas at Houston, University of Texas, Houston Stroke Program, Department of Neurology, 6431 Fannin Street, MSB 7044 | Recruiting |
Houston, Texas, United States, 77030 | |
Contact: Susan Alderman 713-500-5030 | |
United States, Virginia | |
Inova Fairfax Hospital, Inova Research Center, Fairfax Hospital, 3300 Gallows Road | Recruiting |
Falls Church, Virginia, United States, 22042 | |
Contact: Janet Rosecan 703-776-4223 |
Principal Investigator: | Chelsea S Kidwell, MD | Associate Professor of Neurology, Georgetown University |
Principal Investigator: | Reza Jahan, MD | Associate Professor of Radiology, UCLA Medical Center, Interventional Neuroradiology |
Responsible Party: | Georgetown University ( Chelsea S. Kidwell, MD, Associate Professor of Neurology ) |
Study ID Numbers: | P50NS44378 |
Study First Received: | October 16, 2006 |
Last Updated: | December 5, 2008 |
ClinicalTrials.gov Identifier: | NCT00389467 |
Health Authority: | United States: Food and Drug Administration |
stroke ischemic stroke blood clot Merci Retriever |
embolectomy magnetic resonance imaging MRI SPOTRIAS |
Cerebral Infarction Stroke Vascular Diseases Brain Ischemia Central Nervous System Diseases |
Brain Infarction Ischemia Brain Diseases Infarction Cerebrovascular Disorders |
Nervous System Diseases Cardiovascular Diseases |