Doppler Flow Wires in Cerebral Angiography

The purpose of this study is to use a wire with a Doppler tip to measure blood flow in vessels in the brain and determine hemodynamic factors associated with treatment success or failure. Many neurological diseases cause abnormal blood flow in the brain in specific vessels. The special wire used in this study is place into brain blood vessels during standard of care procedure to treat such diseases, and blood flow parameters (such as velocity and pressure) are measured to gain better understanding of these neurological diseases.

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Key information

Conditions

Aneurysm Brain Diseases Cardiovascular Diseases Central Nervous System Diseases Cerebral Aneurysm Cerebrovascular Disorders Intracranial Aneurysm Intracranial Arterial Diseases Nervous System Diseases Vascular Diseases

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Harborview Medical Center

Seattle, Washington, 98104, United States

About this study

Current treatments of cerebral aneurysms are imperfect, and aneurysmal hemodynamics is an important factor in treatment failure. The identification of hemodynamic factors that influence treatment success could predict outcome. Published studies show that the hemodynamic environment of aneurysms changes after treatment, and there is limited retrospective evidence that the degree of change affects treatment success. However, previous hemodynamic calculations did not have access to patient-specific measurements of blood flow, which substantially reduced their accuracy. In addition, no prospective studies of the predictive value of post-treatment aneurysm hemodynamics have been done.

Methods: Prospectively test new aneurysm patients for hemodynamic predictors of treatment outcome based upon the hypothesis long-term aneurysm treatment outcome can be prospectively predicted by measuring the immediate hemodynamic effects of aneurysm treatment with novel patient-specific modeling techniques. Task 1: In a new cohort of patients undergoing aneurysm treatment, the investigators will again use Doppler guidewire measurements to create patient-specific hemodynamic models of treatment effects. By prospectively applying the knowledge of crucial hemodynamic changes the investigators will use immediate post-treatment hemodynamics to predict long-term treatment outcome.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Patient with an unruptured intracranial aneurysm ≥ 5mm in size undergoes endovascular treatment and subsequent angiographic follow-up

Exclusion criteria

-previously enrolled in the study

Treatment and study plan

Primary outcomes

Treatment Prediction

Time frame: May 2017- July 2019

The results of this prospective aim have the potential to substantially influence aneurysm management by predicting long-term outcome at the time of initial treatment. The investigators will determine how well the prospective test predicts long-term treatment success as applied at the time of treatment, using computational fluid dynamics modeling of hemodynamic factors with the incorporation of patient-specific measurements obtained by the Doppler guidewire

Sponsors and collaborators

Lead sponsor

University of Washington

Other

Registry information

Official study title

Predicting Cerebral Aneurysm Recurrence Using Doppler Guidewire Measurements

Important dates

Study start: 2020
Primary completion: 2020
Study completion: 2020
First posted: May 9, 2017
Registry last updated: Oct 1, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed