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Visualization of Cerebral Arteries Using Contrast-Enhanced Transcranial Ultrasound in 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 : Terminated (Study terminated due to slow recruitment and funding ended.)
First Posted : January 27, 2006
Results First Posted : August 7, 2019
Last Update Posted : August 7, 2019
National Institute of Neurological Disorders and Stroke (NINDS)
Information provided by (Responsible Party):
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 Other: 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 400 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)
Actual Enrollment : 61 participants
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 : March 2005
Actual Primary Completion Date : October 2007
Actual Study Completion Date : October 2007

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Ultrasound

Arm Intervention/treatment
Experimental: All stroke code patients
After written informed consent Code Stroke patients will undergo a contrast-enhanced transcranial ultrasound study to visualize the intracranial arteries. To do so, an ultrasound contrast agent (Definity) will be administered intravenously and transcranial ultrasound will be applied via the temporal bone window on both sides. Goal is to visualize and assess the intracranial arteries bilaterally. This includes the following vessel segments on both sides: middle cerebral artery (M1,M2,M3 segments), anterior cerebral artery (A1,A2 segments), posterior cerebral artery (P1,P2 segments), internal carotid artery (C1/2,C3/4 segments).
Other: ultrasound
single intravenous administration of maximum 1.5 milliliter ultrasound contrast agent (Definity), followed by maximum 15 minutes transcranial insonation using diagnostic ultrasound.
Other Name: Doppler

Primary Outcome Measures :
  1. Number of Participants With Successful Visualization of the Intracranial Arteries in Comparison to Reference Method (MRA/CTA) [ Time Frame: within 24 hours after reference method ]
    The number of participants with successful visualization (yes/no) of the cerebral artery segments was assessed by an experienced sonographer who was blinded to the cerebral MRA/CTA.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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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
University of California San Diego Hillcrest Medical Center
San Diego, California, United States, 92101
Sharp Memorial Hospital, 7901 Frost Street
San Diego, California, United States, 92103-8756
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: University of California, San Diego Identifier: NCT00282841     History of Changes
Other Study ID Numbers: P50NS44148MATTREY
P50NS044148-06 ( U.S. NIH Grant/Contract )
First Posted: January 27, 2006    Key Record Dates
Results First Posted: August 7, 2019
Last Update Posted: August 7, 2019
Last Verified: July 2019
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