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Computed Tomography Perfusion (CTP) to Predict Response to Recanalization in Ischemic Stroke Project (CRISP) (CRISP)

This study has been completed.
Saint Luke's Health System
University of Pittsburgh
Emory University
Chatanooga Center for Neurological Research
University of Miami
Information provided by (Responsible Party):
Maarten Lansberg, Stanford University Identifier:
First received: June 15, 2012
Last updated: October 13, 2016
Last verified: October 2016

The overall goal of the CTP to predict Response to recanalization in Ischemic Stroke Project (CRISP) is to develop a practical tool to identify acute stroke patients who are likely to benefit from endovascular therapy.

The project has two main parts. During the first part, the investigators propose to develop a fully automated system (RAPID) for processing of CT Perfusion (CTP) images that will generate brain maps of the ischemic core and penumbra. There will be no patient enrollment in part one of this project.

During the second part, the investigators aim to demonstrate that physicians in the emergency setting, with the aid of a fully automated CTP analysis program (RAPID), can accurately predict response to recanalization in stroke patients undergoing revascularization. To achieve this aim the investigators will conduct a prospective cohort study of 240 consecutive stroke patients who will undergo a CTP scan prior to endovascular therapy. The study will be conducted at four sites (Stanford University, St Luke's Hospital, University of Pittsburgh Medical Center, and Emory University/Grady Hospital). Patients will have an early follow-up MRI scan within 12+/-6 hours to assess reperfusion and a late follow-up MRI scan at day 5 to determine the final infarct.


Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Computed Tomography Perfusion (CTP) to Predict Response to Recanalization in Ischemic Stroke Project

Resource links provided by NLM:

Further study details as provided by Maarten Lansberg, Stanford University:

Primary Outcome Measures:
  • NIHSS Score [ Time Frame: 30 Day ]
    A "favorable clinical response", defined as an 8-point or more improvement on the NIH score when comparing the baseline score to the 30-day score or a 30-day NIH score of 0-1, will be the primary endpoint for the study

Secondary Outcome Measures:
  • modified Rankin Score [ Time Frame: 90 day ]
    90 day modified Rankin Score 0-2, 90 day modified Rankin distribution, and 90 day Rankin Score 0-1

Enrollment: 201
Study Start Date: September 2011
Study Completion Date: February 2016
Primary Completion Date: February 2016 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
acute ischemic stroke patients

Inclusion Criteria:

  1. be 18 or older;
  2. have a clinical diagnosis of ischemic stroke and a score of 5 or more points on the NIHSSS;
  3. be scheduled to undergo intraarterial (IA) therapy for acute hemispheric stroke (either as primary therapy or as adjuvant therapy following intravenous tPA treatment);
  4. be scheduled to have a standard CT including perfusion imaging and CT angiography of the circle of Willis (CTA) prior to IA therapy;
  5. begin intra-arterial thrombectomy within 90 minutes of completion of the CT scan and within 18 hours of symptom onset. (Start of IA therapy is defined as the time of insertion of the femoral artery sheath; Time of brain scan is defined as the time that the scan is completed); and
  6. have provided informed consent.

Exclusion Criteria:

  1. have any pre-existing illness resulting in a modified Rankin Scale Score of 3 or higher prior to the qualifying stroke;
  2. are pregnant.
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Please refer to this study by its identifier: NCT01622517

United States, California
Stanford Hospital and Clinics
Stanford, California, United States, 94305
Sponsors and Collaborators
Stanford University
Saint Luke's Health System
University of Pittsburgh
Emory University
Chatanooga Center for Neurological Research
University of Miami
Principal Investigator: Maarten G Lansberg, MD, PhD Stanford University
  More Information

Responsible Party: Maarten Lansberg, Assistant Professor, Stanford University Identifier: NCT01622517     History of Changes
Other Study ID Numbers: 22227
Study First Received: June 15, 2012
Last Updated: October 13, 2016

Additional relevant MeSH terms:
Cerebrovascular Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases processed this record on May 25, 2017