Ultrasound Enhanced Thrombolytic Therapy of Middle Cerebral Artery Occlusion

Transcranial Ultrasound Enhanced Thrombolysis (TRUST)

The purpose of the present, randomized, controlled multicenter phase III trial is to investigate the safety and efficacy of continuous 1-hour insonation of occluded middle cerebral artery with 2 MHz TCCS in stroke patients treated with intravenous tissue plasminogen activator (t-PA) within 3 hours after symptom onset.

Study Overview

• Status: Unknown
• Conditions: Thrombosis; Intracranial Embolism
• Intervention / Treatment: Procedure: transcranial ultrasound in patients treated with iv t-PA

Detailed Description

Thrombolysis with intravenous(iv) tissue plasminogen activator (t-PA) is the only effective and approved therapy for acute ischemic stroke. The most frequent cause of ischemic stroke is thrombosis of the middle cerebral artery (MCA). Preliminary in vitro, animal and human studies suggest that ultrasound accelerates thrombolysis induced by t-PA, and recanalization of acute MCA occlusion due to thrombolysis is an independent predictor of good clinical outcome. Thus, insonation of an occluded MCA through the temporal bone in stroke patients who are treated with iv t-PA might enhance recanalization and improve clinical outcome. The present prospective, randomized, controlled multicenter pilot study will investigate the safety and efficacy of continuous 1-hour insonation of the occluded MCA with 2 MHz transcranial color duplex sonography in patients with ischemic stroke treated with iv t-PA within 3 hours after symptom onset. It is planned to randomize 400 patients in 6 Swiss centers during an enrolment period of 33 months with an individual follow up of 3 months. The study endpoints include safety and efficacy assessments. The primary safety endpoint is to determine the rate of symptomatic intracranial hemorrhage (ICH) in both treatment groups. The primary efficacy endpoint is to determine whether a good functional outcome (modified Rankin scale, mRs, score of 0-2) differs between both treatment groups. Secondary endpoints include (1) asymptomatic ICH occuring during or within the first 24-48 hours after t-PA infusion, (2) early clinical recovery by 10 or more National Institute of Health Stroke Scale (NIHSS) points or dramatic recovery (total NIHSS score of 3 or less) at 24-48 hours after t-PA infusion, (3) mean mRS score at 90 days after t-PA infusion, (4) death occuring during the study period, and (5) recanalization at 24-48 hours after t-PA infusion.

• Study Type: Interventional
• Enrollment: 400
• Phase: Phase 3

Contacts and Locations

Study Locations

• Switzerland
  • Aarau, Switzerland
    • Recruiting
    • Kantonsspital Aarau, Department of Neurology
    • Contact: Hansjörg Hungerbühler, MD; Phone Number: +41 62 838 66 75; Email: hansjoerg.hungerbuehler@ksa.ch
    • Principal Investigator: Hansjörg Hungerbühler, MD
  • Basel, Switzerland
    • Recruiting
    • University Hospital of Basel, Department of Neurology
    • Contact: Stefan Engelter, MD; Phone Number: +41 61 265 25 25; Email: sengelter@uhbs.ch
    • Principal Investigator: Philippe Lyrer, MD
    • Principal Investigator: Stefan Engelter, MD
  • Bern, Switzerland
    • Recruiting
    • University hospital of Bern, Department of Neurology
    • Contact: Marcel Arnold, MD; Phone Number: +41 31 632 33 32; Email: marcel.arnold@insel.ch
    • Principal Investigator: H.-P. Mattle, MD
    • Principal Investigator: Marcel Arnold, MD
  • Geneva, Switzerland
    • Recruiting
    • University Hospital of Geneva, Department of Neurology
    • Contact: Roman Sztajzel, MD; Phone Number: +41 22 372 83 10; Email: Roman.Sztajzel@hcuge.ch
    • Principal Investigator: Roman Sztajzel, MD
  • Lausanne, Switzerland
    • Recruiting
    • University Hospital of Lausanne, Department of Neurology
    • Contact: Patrik Michel, MD; Phone Number: +41 21 314 11 85; Email: patrik.michel@chuv.hospvd.ch
    • Principal Investigator: Patrik Michel, MD
  • Zurich, Switzerland, 8091
    • Recruiting
    • University Hospital of Zurich, Department of Neurology
    • Contact: Ralf W Baumgartner, MD; Phone Number: +41 1 255 56 86; Email: ralf.baumgartner@usz.ch
    • Contact: Dimitrios Georgiadis, MD; Email: dimitrios.georgiadis@usz.ch
    • Principal Investigator: Ralf W Baumgartner, MD
    • Principal Investigator: Dimitrios Georgiadis, MD
    • Sub-Investigator: Hakan Sarikaya, MD

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Child; Adult; Older Adult
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• acute ischemic stroke in the MCA territory according to clinical and cranial computed tomography (CT) or cranial MR imaging (MRI) findings
• patient undergoing iv thrombolysis with t-PA within 3 hours after stroke onset
• Occlusion of sphenoidal (M1) or insular (M2) segment of the MCA at CT (CTA), MR (MRA) or catheter (CA) angiography
• appropriate temporal bony window without echocontrast agents for insonation with TCCS
• full functional independence prior to present stroke (mRS 0-1), use of a cane for walking due to comorbid condition is acceptable
• written informed consent, signed and dated by the subject (or subject's authorized representative, if allowed by local laws) and by the person obtaining the consent, indicating agreement to comply with all protocol-specific procedures

Exclusion Criteria:

• unconsciousness (more than 2 points on item 1a on NIHSS)
• history of intracranial hemorrhage, arteriovenous malformation or aneurysm
• severe cranio-cerebral trauma within the last 3 months
• symptoms of subarachnoidal hemorrhage
• time of symptom onset unclear
• large surgical intervention or trauma within the last 10 days
• expected survival below 90 days after iv t-PA treatment
• severe hepatic disease, esophageal varices, acute pancreatitis
• septic embolism, endocarditis, pericarditis after myocardial infarction
• pregnancy or childbirth within the last 30 days or nursing mothers
• history of hemorrhagic diathesis or coagulopathy
• untreatable increase of arterial blood pressure (>185mmHg systolic, >110mmHg diastolic)
• intracranial hemorrhage, arteriovenous malformations or aneurysm at brain imaging
• thrombocytes <100'000 per microliter
• international normalized ratio (INR)>1.7 or partial thromboplastin time (PTT) prolongated
• serum glucose <2.7mmol/l or >22.2mmol/l
• severe renal insufficiency or other contraindications against CT-contrast agents

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Symptomatic intracranial hemorrhage (safety)
Functional outcome (efficacy)

Secondary Outcome Measures

Outcome Measure
Asymptomatic intracranial hemorrhage 24-48 hours after t-PA infusion
Early clinical recovery by 10 or more NIHSS points or dramatic recovery (total NIHSS 3 or less)at 24-48 hours after t-PA infusion
Mean mRS score at 90 days after t-PA infusion
Death occurring during study period
Recanalization at 24-48 hours after t-PA infusion

Collaborators and Investigators

• Sponsor: University of Zurich
• Collaborators: Swiss National Science Foundation
• Investigators: Study Chair: Ralf W Baumgartner, MD, University Hospital of Zurich, Department of Neurology, Zurich, Switzerland

Study record dates

Study Major Dates

• Study Start: June 1, 2006
• Study Completion (Anticipated): June 1, 2009

Study Registration Dates

• First Submitted: June 13, 2006
• First Submitted That Met QC Criteria: June 13, 2006
• First Posted (Estimate): June 14, 2006

Study Record Updates

• Last Update Posted (Estimate): April 27, 2007
• Last Update Submitted That Met QC Criteria: April 25, 2007
• Last Verified: April 1, 2007

More Information

Terms related to this study

• Keywords: middle cerebral artery occlusion; intracranial embolism and thrombosis; ultrasound enhanced thrombolysis; Patients receiving iv thrombolytic therapy (t-PA)
• Additional Relevant MeSH Terms: Ischemia; Pathologic Processes; Necrosis; Cardiovascular Diseases; Vascular Diseases; Cerebrovascular Disorders; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Embolism and Thrombosis; Brain Ischemia; Infarction; Stroke; Brain Infarction; Cerebral Arterial Diseases; Intracranial Arterial Diseases; Intracranial Embolism and Thrombosis; Thromboembolism; Cerebral Infarction; Embolism; Thrombosis; Infarction, Middle Cerebral Artery; Intracranial Embolism
• Other Study ID Numbers: E-031/2004