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Showing 1–24 of 30 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Doppler flow measurement Clear all
Withdrawn No phase listed Observational Accepts healthy volunteers

Gas Kinetics and Metabolism in Anesthesia During Non Steady State

NCT00225381
View directory record Official record
Conditions
Anesthetized Healthy Patients (ASA 1 or 2) in the Supine Position, Excluding Head, Neck and Head Surgeries, Anesthetized Patient With Severe Systemic Disease (ASA 3 or 4)
Interventions
connection of measuring device to anesthesia circuit, drawing of blood sample through an arterial line, placed according to clinical criteria by primary anesthesia team, changing operating room bed position (head down and up position), adding PEEP during anesthesia, placement of esophageal Doppler for cardiac output measurements, Humidity sensor, A mixing chamber (bymixer), Pneumotachometer cuvette, Mass spectrometer sampling port
Device · Procedure
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2012
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Mar 22, 2021 · Synced Sep 8, 2026, 9:28 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Vascular Dysfunction in Hypertensive Postmenopausal Women

NCT03371823
View directory record Official record
Conditions
Cardiovascular Diseases, Hypertension
Interventions
Normotensive, Hypertensives
Other · Drug
Lead sponsor
University of Delaware
Other
Eligibility
50 Years to 70 Years · Female only
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated Jan 18, 2022 · Synced Sep 8, 2026, 9:28 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Validation of Pulse Wave Doppler Demodulation Algorithm for the Continuous, Non-invasive Measurement of Blood Flow Velocity

NCT01750125
View directory record Official record
Conditions
Focus is on Healthy Subjects
Interventions
measure ascending aortic blood flow with pulse wave Doppler
Device
Lead sponsor
University of Virginia
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 30, 2014 · Synced Sep 8, 2026, 9:28 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Microvascular Function in Patients Undergoing 5-Fluorouracil Chemotherapy

NCT04042298
View directory record Official record
Conditions
Gastrointestinal Cancer, Head and Neck Cancer, Breast Cancer, Chemotherapy Effect, 5-Fluorouracil Toxicity
Interventions
Arterial blood pressure, Skin microcirculatory blood flow, Brachial artery blood flow, Venous blood draw
Other
Lead sponsor
Kansas State University
Other
Eligibility
21 Years and older
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Manhattan, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 1, 2025 · Synced Sep 8, 2026, 9:28 PM EDT
Terminated No phase listed Observational

Cardiomyopathy in Steroid-resistant Nephrotic Syndrome: Impact of Focal Segmental Glomerulosclerosis

NCT00883636
View directory record Official record
Conditions
Focal Segmental Glomerulosclerosis, Nephrotic Syndrome, Steroid Resistant Nephrotic Syndrome, Chronic Kidney Disease
Interventions
Cardiovascular Assessment, Renal Assessment, Genetic Evaluation
Other
Lead sponsor
Northwell Health
Other
Eligibility
6 Months to 21 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
New Hyde Park, New York
Source: ClinicalTrials.gov public record
Updated Jun 18, 2013 · Synced Sep 8, 2026, 9:28 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Cardiovascular and Neurovascular Regulation in GWI

NCT04586049
View directory record Official record
Conditions
Brain Blood Flow, Neurovascular Control
Interventions
MRI, Transcranial Doppler Ultrasound, Sympathetic Nerve Activity
Device · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
45 Years to 68 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Sep 8, 2026, 9:28 PM EDT
Terminated Not applicable Interventional Results available

Impact of Transjugular Intrahepatic Portosystemic Shunts on Liver Stiffness

NCT03352882
View directory record Official record
Conditions
Portal Hypertension, Liver Fibroses
Interventions
Ultrasound
Diagnostic Test
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 79 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 30, 2019 · Synced Sep 8, 2026, 9:28 PM EDT
Completed No phase listed Observational

Doppler Flow Wires in Cerebral Angiography

NCT03145701
View directory record Official record
Conditions
Aneurysm, Cerebral Aneurysm
Interventions
Not listed
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
117 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 30, 2020 · Synced Sep 8, 2026, 9:28 PM EDT
Completed Phase 4 Interventional Results available

The Effect of Linagliptin on Mitochondrial and Endothelial Function

NCT01969084
View directory record Official record
Conditions
Type II Diabetes Mellitus
Interventions
Linagliptin, Placebo, Microcirculation testing, Macrocirculation testing, MRI Scans
Drug · Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
30 Years to 70 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 17, 2016 · Synced Sep 8, 2026, 9:28 PM EDT
Recruiting Not applicable Interventional

qDSA Blood Flow Measurement in Patients Undergoing TAE of the Liver

NCT06971991
View directory record Official record
Conditions
Transarterial Embolism, Transarterial Chemoembolization, Radioembolization
Interventions
qDSA Blood Flow Measurement
Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 29, 2026 · Synced Sep 8, 2026, 9:28 PM EDT
Completed No phase listed Observational

Early Markers of Radiation-Induced Cardiac Injury in Hodgkin Lymphoma Treated With Radiation Therapy

NCT02404818
View directory record Official record
Conditions
Hodgkin's Lymphoma
Interventions
Cardiac Magnetic Resonance Imaging, Echocardiogram
Procedure
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 9, 2022 · Synced Sep 8, 2026, 9:28 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 16, 2025 · Synced Sep 8, 2026, 9:28 PM EDT
Completed Not applicable Interventional

Optimizing Left Ventricular Lead To Improve Cardiac Output

NCT01399801
View directory record Official record
Conditions
Ischemic Congestive Cardiomyopathy, Dilated Cardiomyopathy, Congestive Heart Failure
Interventions
Doppler flow measurement, standard implantation of the LV lead
Procedure
Lead sponsor
Ann Marie Chikowski
Other
Eligibility
Not listed
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Wynnewood, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 29, 2022 · Synced Sep 8, 2026, 9:28 PM EDT
Completed Not applicable Interventional

Ultrasound Instrument to Prevent Dialysis Graft Failure

NCT00309348
View directory record Official record
Conditions
Hemodialysis
Interventions
Weekly measurement of graft flow
Other
Lead sponsor
DVX, LLC
Industry
Eligibility
18 Years and older
Enrollment
111 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
2
States / cities
Jackson Heights, New York • Jamaica, New York
Source: ClinicalTrials.gov public record
Updated Sep 26, 2017 · Synced Sep 8, 2026, 9:28 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 26, 2026 · Synced Sep 8, 2026, 9:28 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Blood Flow and Pain Crises in People With Sickle Cell Disease

NCT01568710
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years to 99 Years
Enrollment
94 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2018
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 8, 2018 · Synced Sep 8, 2026, 9:28 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Assessing the Effects of a Topically Applied Cream to Clitoral Blood Flow

NCT01085981
View directory record Official record
Conditions
Female Sexual Dysfunction
Interventions
arginine 20%, nicotinamide .01%, niacin.1%, in LipodermPG 50%, Topical study cream, GRAS cream
Drug
Lead sponsor
East Suburban Ob Gyn
Other
Eligibility
25 Years to 60 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Monroeville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 11, 2010 · Synced Sep 8, 2026, 9:28 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Pulmonary Blood Flow Measurements in CHF Patients

NCT01831713
View directory record Official record
Conditions
Congestive Heart Failure (CHF)
Interventions
Not listed
Lead sponsor
Echosense Ltd.
Industry
Eligibility
50 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 14, 2015 · Synced Sep 8, 2026, 9:28 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Cerebral Blood Flow Evaluation With Trancranial Doppler After Interscalene Nerve Block

NCT04642612
View directory record Official record
Conditions
Regional Anesthesia, Horner Syndrome, Cerebral Blood Flow
Interventions
TCD Measurement
Device
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 85 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Sep 15, 2021 · Synced Sep 8, 2026, 9:28 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 9, 2024 · Synced Sep 8, 2026, 9:28 PM EDT
Completed Not applicable Interventional

Intraosseous Catheter Confirmation Study

NCT03908879
View directory record Official record
Conditions
Critical Illness
Interventions
Standard intraosseous (IO) catheter confirmation procedure, Color flow Doppler intraosseous (IO) catheter confirmation procedure, Pressure transduction intraosseous (IO) catheter confirmation procedure
Procedure
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Newark, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 7, 2023 · Synced Sep 8, 2026, 9:28 PM EDT
Completed Not applicable Interventional Results available

Efficacy of Ambrisentan in Limited Scleroderma Patients in Improving Blood Flow to Hands or Feet

NCT01072669
View directory record Official record
Conditions
Ischemia
Interventions
ambrisentan
Drug
Lead sponsor
Soumya Chatterjee
Other
Eligibility
18 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated May 2, 2013 · Synced Sep 8, 2026, 9:28 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 26, 2026 · Synced Sep 8, 2026, 9:28 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Pilot Study of VTI Doppler Probe Use to Identify Neurovascular Bundle During Prostate Surgery

NCT01794936
View directory record Official record
Conditions
Prostate Cancer, Nerve Sparing Prostatectomy
Interventions
VTI Probe
Device
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older · Male only
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 28, 2024 · Synced Sep 8, 2026, 9:28 PM EDT