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Visualization of the Cerebral Arterial Circulation Using Contrast-Enhanced Transcranial Ultrasound in Code Stroke Patients

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00282841
Recruitment Status : Unknown
Verified July 2008 by University of California, San Diego.
Recruitment status was:  Active, not recruiting
First Posted : January 27, 2006
Last Update Posted : September 11, 2009
National Institute of Neurological Disorders and Stroke (NINDS)
Information provided by:
University of California, San Diego

Brief Summary:
The purpose of this study is to find out more about the usefulness of ultrasound in combination with a contrast solution to look for blood vessel blockage or occlusion in the brains of stroke patients.

Condition or disease Intervention/treatment Phase
Stroke Procedure: ultrasound Not Applicable

Detailed Description:

Ischemic stroke is a common, devastating and costly disease. A stroke is usually caused by a blockage in one of the arteries that carries blood to the brain.

The purpose of this study is to visualize the blood vessels in the brain and to look for vessel occlusion (i.e., blockage) which may be the cause of stroke. Ultrasound contrast imaging may or may not improve the ability to diagnose vessel occlusion in the brain quickly and precisely, thereby expediting the therapy currently in place for acute stroke.

The contrast solutions used in this study have been approved by the Food and Drug Administration because they improve ultrasound pictures taken in the heart. While the solutions are approved for use with ultrasound in viewing the heart, the usefulness in viewing brain vessels has not been approved and is experimental.

The study will enroll 403 participants with possible diagnosis of acute stroke. Individuals participating in the study will be injected with a contrast solution via an intravenous line. A small probe will be used to obtain images of blood vessels in the head. The study researchers will measure vital signs prior to injection of the contrast solution, 5 minutes after the injection, and at the end of the ultrasound. Each participant will have a 5-minute mental function assessment and a brief neurological exam. Participants will undergo at least 3 ultrasounds. The total time of each ultrasound is less than 30 minutes.

This study is part of the Specialized Program of Translational Research in Acute Stroke to enhance and initiate translational research that ultimately will benefit stroke patients. Results from this study may help investigators learn about the future development of new diagnostic tests for stroke.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 403 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Visualization of the Cerebral Arterial Circulation Using Contrast-Enhanced Transcranial Ultrasound in Code Stroke Patients
Study Start Date : May 2005
Estimated Primary Completion Date : May 2010
Estimated Study Completion Date : May 2010

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Ultrasound

Arm Intervention/treatment
Experimental: 1
contrast-enhanced transcranial ultrasound to visualize the intracranial arteries
Procedure: ultrasound
single intravenous administration of max. 1.5ml ultrasound contrast agent (Definity), followed by max. 15min transcranial insonation using diagnostic ultrasound.

Primary Outcome Measures :
  1. visualization of the intracranial arteries in comparison to reference method (MRA/CTA) [ Time Frame: within 24 hours ]

Secondary Outcome Measures :
  1. Measure: vessel recanalization during/post tPA administration [ Time Frame: within 24 hours ]
  2. sensitivity/specificity, positive/negative predictive value of contrast-enhanced ultrasound in comparison to CTA/MRA [ Time Frame: baseline, 30min, 3h, 24h, day30 ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • patient 18 years of age or older
  • code stroke patient

Exclusion Criteria:

  • women with positive pregnancy test
  • women who are breast feeding
  • severe emphysema
  • pulmonary vasculitis
  • history of pulmonary emboli
  • chronic renal failure

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00282841

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United States, California
Sharp Memorial Hospital, 7901 Frost Street
San Diego, California, United States, 92103-8756
University of California San Diego Hillcrest Medical Center
San Diego, California, United States
Sponsors and Collaborators
University of California, San Diego
National Institute of Neurological Disorders and Stroke (NINDS)
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Principal Investigator: Robert Mattrey, MD UCSD Stroke Center

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Responsible Party: Robert F. Mattrey, M.D., Director of Research, Department of Radiology, University of California, San Diego Identifier: NCT00282841     History of Changes
Other Study ID Numbers: P50NS44148MATTREY
First Posted: January 27, 2006    Key Record Dates
Last Update Posted: September 11, 2009
Last Verified: July 2008

Keywords provided by University of California, San Diego:
contrast solution

Additional relevant MeSH terms:
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Cerebrovascular Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases