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ClinicalTrials.gov public records Last synced Oct 3, 2026, 7:23 PM EDT

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Showing 1–24 of 50 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: transcranial Doppler ultrasonography (TCD) Clear all
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

CLOTBUST Hands-Free: A Phase I/II Pilot Safety Trial

NCT01240356
View directory record Official record
Conditions
Stroke
Interventions
2-MHz transcranial Doppler ultrasound, 2-MHz transcranial Doppler ultrasound insonation
Device
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
2
States / cities
Birmingham, Alabama • Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 23, 2016 · Synced Oct 3, 2026, 7:23 PM EDT
Terminated Not applicable Interventional

Effects of Cerebral Protection With Filters vs. Flow Reversal on Cerebral Embolization After Carotid Artery Stenting

NCT01414387
View directory record Official record
Conditions
Carotid Artery Disease, Stroke
Interventions
Carotid filter, Carotid reversal of flow
Procedure
Lead sponsor
Dallas VA Medical Center
Federal
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Aug 2, 2017 · Synced Oct 3, 2026, 7:23 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Transcranial Doppler Using Wearable Ultrasound Patch

NCT06073145
View directory record Official record
Conditions
Medical Device Complication, Brain Injuries, Brain Diseases, Stroke, Vasospasm
Interventions
conventional transcranial Doppler probe and wearable ultrasound patch.
Device
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Apr 10, 2024 · Synced Oct 3, 2026, 7:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Acute Dietary Sodium on Cerebrovascular Reactivity and Blood Pressure Reactivity

NCT03564262
View directory record Official record
Conditions
Blood Pressure, Cerebrovascular Reactivity
Interventions
Low Sodium Meal (138 mg sodium), High Sodium Meal (1,495 mg sodium)
Other
Lead sponsor
University of Delaware
Other
Eligibility
18 Years to 45 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated Sep 22, 2020 · Synced Oct 3, 2026, 7:23 PM EDT
Recruiting No phase listed Observational

Brain Blood Flow and Cerebral Autoregulation Monitoring in Critically Ill Children

NCT07613918
View directory record Official record
Conditions
Critical Illness, Pediatric Critical Illness, Respiratory Failure, Traumatic Brain Injury, Cardiac Arrest
Interventions
Transcranial Doppler
Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
1 Day to 17 Years
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Oct 3, 2026, 7:23 PM EDT
Completed Not applicable Interventional

DCS Study in Extremely Premature Newborns

NCT04367181
View directory record Official record
Conditions
Premature Birth, Extremely Low Birth Weight, Infant, Small for Gestational Age, Intracerebral Hemorrhage
Interventions
Diffuse Correlation Spectroscopy (DCS), Amplitude Integrated Electroencephalography (aEEG)
Device
Lead sponsor
Maria Angela Franceschini
Other
Eligibility
0 Hours to 72 Hours
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Oct 3, 2026, 7:23 PM EDT
Terminated No phase listed Observational Results available

Validation of Velocity Curvature Index as a Diagnostic Biomarker Tool for Assessment of Large Vessel Stroke

NCT05547412
View directory record Official record
Conditions
Stroke, Acute Ischemic Stroke
Interventions
NovaGuide 2 Intelligent Ultrasound System
Device
Lead sponsor
NeuraSignal Inc dba NovaSignal
Industry
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Chattanooga, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 9, 2024 · Synced Oct 3, 2026, 7:23 PM EDT
Not yet recruiting No phase listed Observational

Prospective Observational Multimodal Neuromonitoring in Adult NSICU Patients

NCT07577713
View directory record Official record
Conditions
Subarachnoid Hemorrhage, Aneurysmal, Brain Injuries, Traumatic, Cerebral Hemorrhage, Ischemic Stroke, Delayed Emergence From Anesthesia, Encephalopathy
Interventions
Not listed
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Oct 3, 2026, 7:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sex-specific Effect of Restricted Sleep on Brain Health

NCT05920759
View directory record Official record
Conditions
Cerebrovascular Circulation
Interventions
Cerebral blood flow
Diagnostic Test
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 45 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 26, 2025 · Synced Oct 3, 2026, 7:23 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Exercise in Adolescents With Insulin Resistance

NCT04154865
View directory record Official record
Conditions
Insulin Resistance
Interventions
Hypercapnia, Transcranial Doppler, Cycle ergometer, Cognitive Tests
Other · Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
12 Years to 18 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 3, 2024 · Synced Oct 3, 2026, 7:23 PM EDT
Terminated No phase listed Observational Results available

Variability in Transcranial Doppler Technique in Neuro-Critical Care Patients

NCT04583163
View directory record Official record
Conditions
Cerebral Aneurysm, Stroke, Vasospasm, Cerebral, Subarachnoid Hemorrhage, Aneurysmal, Aneurysmal Subarachnoid Hemorrhage, Cerebral Ischemia
Interventions
Transcranial Doppler
Diagnostic Test
Lead sponsor
Hackensack Meridian Health
Other
Eligibility
18 Years and older
Enrollment
3 participants
Timeline
2020 – 2022
U.S. locations
1
States / cities
Hackensack, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 15, 2025 · Synced Oct 3, 2026, 7:23 PM EDT
Completed Not applicable Interventional Results available

RoBotic TCD Ultrasound BubbLe Study Compared to Transthoracic Echocardiography for Detection of Right to Left Shunt

NCT04604015
View directory record Official record
Conditions
Embolic Stroke of Undetermined Source, Transient Ischemic Attack, Right-To-Left Atrial Shunt, Patent Foramen Ovale
Interventions
NeuralBot Investigational System, Transthoracic Echocardiography (TTE)
Diagnostic Test
Lead sponsor
NeuraSignal Inc dba NovaSignal
Industry
Eligibility
18 Years and older
Enrollment
154 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
7
States / cities
Phoenix, Arizona • Portland, Oregon • Chattanooga, Tennessee + 3 more
Source: ClinicalTrials.gov public record
Updated Jan 24, 2024 · Synced Oct 3, 2026, 7:23 PM EDT
Terminated Phase 1Phase 2 Interventional

Transcranial Ultrasound in Clinical SONothrombolysis

NCT00504842
View directory record Official record
Conditions
Acute Ischemic Stroke
Interventions
MRX-801, Placebo
Drug
Lead sponsor
ImaRx Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
13
States / cities
Birmingham, Alabama • Phoenix, Arizona • Newport Beach, California + 9 more
Source: ClinicalTrials.gov public record
Updated Apr 15, 2008 · Synced Oct 3, 2026, 7:23 PM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

Impact of NOS, COX, and ROS Inhibition on Cerebral Blood Flow Regulation

NCT03066115
View directory record Official record
Conditions
Hypoxia, Hypercapnia
Interventions
L-NMMA, Ketorolac, Ascorbic Acid, Intravenous Catheter, Transcranial Doppler Ultrasound
Drug · Procedure
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 45 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jan 10, 2019 · Synced Oct 3, 2026, 7:23 PM EDT
Not yet recruiting No phase listed Observational

Continuous Assessment of Brain Blood Perfusion in Subarachnoid Hemorrhage Patients Using Near-Infrared Spectroscopy (NIRS)

NCT06932640
View directory record Official record
Conditions
Subarachnoid Hemorrhage, Aneurysmal
Interventions
- Non-Invasive Near-infrared Spectroscopy (NIRS) device (HEM1 with Foresight Elite Sensor)
Device
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 89 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 22, 2026 · Synced Oct 3, 2026, 7:23 PM EDT
Completed Phase 2 Interventional

Hydroxyurea to Prevent Stroke in Children With Sickle Cell Anemia and Elevated TCD Flow Velocity

NCT00402480
View directory record Official record
Conditions
Stroke
Interventions
Hydroxyurea
Drug
Lead sponsor
Duke University
Other
Eligibility
3 Years to 18 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 19, 2013 · Synced Oct 3, 2026, 7:23 PM EDT
Completed No phase listed Observational

Monitoring of Cerebral Blood Flow Autoregulation Using Near Infrared Spectroscopy

NCT00769691
View directory record Official record
Conditions
Cardiacsurgery
Interventions
Not listed
Lead sponsor
Johns Hopkins University
Other
Eligibility
60 Years and older
Enrollment
225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 22, 2017 · Synced Oct 3, 2026, 7:23 PM EDT
Recruiting No phase listed Observational

Pulmonary Embolism and Right-to-Left Shunts

NCT07519876
View directory record Official record
Conditions
Pulmonary Embolism (PE), Right-to-Left Shunt, Stroke, Atrial Septal Defects, Patent Foramen Ovale (PFO), Pulmonary Arteriovenous Malformation
Interventions
Not listed
Lead sponsor
Tufts Medical Center
Other
Eligibility
18 Years and older
Enrollment
256 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 9, 2026 · Synced Oct 3, 2026, 7:23 PM EDT
Completed No phase listed Observational

Non-Significant Risk Study Comparing the Nautilus NeuroWaveTM to Transcranial Doppler as an Aid to Diagnosing Vasospasm

NCT01595802
View directory record Official record
Conditions
Cerebral Vasospasm
Interventions
Nautilus NeuroWave, Transcranial Doppler (TCD)
Device
Lead sponsor
Jan Medical, Inc.
Industry
Eligibility
18 Years and older
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 9, 2022 · Synced Oct 3, 2026, 7:23 PM EDT
Terminated Phase 3 Interventional Results available

Sparing Conversion to Abnormal TCD (Transcranial Doppler) Elevation (SCATE)

NCT01531387
View directory record Official record
Conditions
Sickle Cell Anemia
Interventions
Hydroxyurea
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
2 Years to 10 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Feb 8, 2016 · Synced Oct 3, 2026, 7:23 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Brain Blood Flow: Age and Gender

NCT02840851
View directory record Official record
Conditions
Healthy, Aging
Interventions
MRI, TCD
Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
20 Years to 64 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 9, 2019 · Synced Oct 3, 2026, 7:23 PM EDT
Not yet recruiting No phase listed Observational

Feasibility of Using NeuraSignal Transcranial Doppler Robot

NCT06565442
View directory record Official record
Conditions
Cerebral Autoregulation
Interventions
NeuraSignal transcranial doppler robot
Device
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 89 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jul 27, 2026 · Synced Oct 3, 2026, 7:23 PM EDT
Active, not recruiting No phase listed Observational

Cerebral Hemodynamics and Microemboli During Placement of Relay®Branch Thoracic Stent-Graft System

NCT05155956
View directory record Official record
Conditions
Thoracic Aortic Aneurysm, Thoracic Aortic Dissection, Microemboli
Interventions
transcranial Doppler ultrasonography (TCD)
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Oct 3, 2026, 7:23 PM EDT
Completed No phase listed Observational

Transcranial Doppler Ultrasound Monitoring During Flow-Diverter Embolization

NCT02354300
View directory record Official record
Conditions
Intracranial Aneurysm, Aneurysm, Intracranial, Giant Intracranial Aneurysm
Interventions
TCD Ultrasound
Device
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Aug 26, 2016 · Synced Oct 3, 2026, 7:23 PM EDT