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Showing 1–24 of 52 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Platelet Thrombus Clear all
Completed No phase listed Observational

Platelet Sub-study of the TWILIGHT Trial

NCT04001374
View directory record Official record
Conditions
Coronary Artery Disease, Myocardial Infarction
Interventions
Ticagrelor, ASA
Drug
Lead sponsor
Juan Badimon
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 25, 2020 · Synced Jul 22, 2026, 11:55 AM EDT
Completed No phase listed Observational

Heparin-Induced Thrombocytopenia Registry

NCT00456326
View directory record Official record
Conditions
Heparin-Induced Thrombocytopenia
Interventions
Not listed
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
Not listed
Enrollment
242 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 17, 2008 · Synced Jul 22, 2026, 11:55 AM EDT
Completed Not applicable Interventional

GRAVITAS: Gauging Responsiveness With A VerifyNow Assay-Impact On Thrombosis And Safety

NCT00645918
View directory record Official record
Conditions
Coronary Arteriosclerosis, Acute Coronary Syndrome
Interventions
clopidogrel, placebo
Drug
Lead sponsor
Accumetrics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
2,800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
72
States / cities
Birmingham, Alabama • Scottsdale, Arizona • La Jolla, California + 59 more
Source: ClinicalTrials.gov public record
Updated Jun 15, 2011 · Synced Jul 22, 2026, 11:55 AM EDT
Terminated No phase listed Observational Results available

Evaluating the Presence of Blood Clots in People With Heparin-Induced Thrombocytopenia (HIT) (The HOT Study)

NCT00594685
View directory record Official record
Conditions
Thrombocytopenia
Interventions
Not listed
Lead sponsor
Carelon Research
Other
Eligibility
6 Months and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
21
States / cities
Atlanta, Georgia • Iowa City, Iowa • New Orleans, Louisiana + 13 more
Source: ClinicalTrials.gov public record
Updated Mar 12, 2013 · Synced Jul 22, 2026, 11:55 AM EDT
Completed Phase 2 Interventional

Platelet Aggregation Inhibition in Children on Clopidogrel (PICOLO)

NCT00115375
View directory record Official record
Conditions
Congenital Heart Defects, Blood Platelet Disorders
Interventions
Clopidogrel (SR25990)
Drug
Lead sponsor
Sanofi
Industry
Eligibility
Up to 24 Months
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Bridgewater, New Jersey
Source: ClinicalTrials.gov public record
Updated Mar 24, 2009 · Synced Jul 22, 2026, 11:55 AM EDT
Completed Phase 4 Interventional Results available

ECMO Hemostatic Transfusions in Children

NCT05796557
View directory record Official record
Conditions
Extracorporeal Membrane Oxygenation Complication, Hemorrhage, Thromboembolism, Transfusion Adverse Reaction
Interventions
Platelet Transfusion
Biological
Lead sponsor
Yale University
Other
Eligibility
Up to 18 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
9
States / cities
Atlanta, Georgia • Iowa City, Iowa • Louisville, Kentucky + 5 more
Source: ClinicalTrials.gov public record
Updated May 30, 2025 · Synced Jul 22, 2026, 11:55 AM EDT
Not listed No phase listed Observational

National Vaccine Adverse Event Reporting Survey and Etiology

NCT05095844
View directory record Official record
Conditions
COVID-19, Vaccine Adverse Reaction, Vaccine Reaction, Vaccine or Biological Substance, Unspecified Causing Adverse Effects in Therapeutic Use, Corona Virus Infection, Blood Clot, Thrombocytopenia, Neuritis, Vasculitis, Influenza, Guillain-Barré, GWAS, Genetic Sequencing
Interventions
vaccinated
Biological
Lead sponsor
Neuroganics LLC
Industry
Eligibility
5 Years to 99 Years
Enrollment
100,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Northglenn, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 17, 2022 · Synced Jul 22, 2026, 11:55 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Effects of Dietary Erythritol on Platelet Reactivity and Vascular Inflammation

NCT05967741
View directory record Official record
Conditions
Platelet Aggregation, Spontaneous, Vascular Thrombosis
Interventions
Erythritol, Aspartame
Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 70 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Dec 4, 2025 · Synced Jul 22, 2026, 11:55 AM EDT
Completed No phase listed Observational

The Role of Fat Emboli in the Trauma Inflammatory Response

NCT02069327
View directory record Official record
Conditions
Femoral Fracture
Interventions
Not listed
Lead sponsor
Poudre Valley Health System
Other
Eligibility
Not listed
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Loveland, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 19, 2019 · Synced Jul 22, 2026, 11:55 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

CES1 Crossover Trial of Clopidogrel and Ticagrelor

NCT03161678
View directory record Official record
Conditions
Myocardial Infarction, Thrombosis, Platelet Dysfunction
Interventions
Clopidogrel, Ticagrelor
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 75 Years
Enrollment
111 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Lancaster, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 5, 2024 · Synced Jul 22, 2026, 11:55 AM EDT
Terminated Phase 2 Interventional Results available

Fondaparinux for the Treatment of Heparin-Induced Thrombocytopenia (HIT)

NCT00673439
View directory record Official record
Conditions
Heparin-Induced Thrombocytopenia
Interventions
fondaparinux, warfarin
Drug
Lead sponsor
University of Louisville
Other
Eligibility
18 Years to 75 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Nov 7, 2019 · Synced Jul 22, 2026, 11:55 AM EDT
Active, not recruiting Not applicable Interventional

Thromboelastography With Platelet Mapping to Guide Antiplatelet Therapy After Lower Extremity Revascularization

NCT07597239
View directory record Official record
Conditions
Thrombosis, Arterial Occlusive Diseases, Thromboelastography (TEG), Peripheral Arterial Disease(PAD), Stent Thrombosis, Platelet Inhibition, PRU(Platelet Reactivity Unit)
Interventions
Aspirin, Clopidogrel, Ticagrelor, Platelet Reactivity Testing, Thromboelastography with Platelet Mapping
Drug · Diagnostic Test
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
60 Years and older
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 19, 2026 · Synced Jul 22, 2026, 11:55 AM EDT
Completed Phase 4 Interventional

Effect of Indinavir Plus Two Other Anti-HIV Drugs on Blood Clotting in HIV-Positive Males With Hemophilia

NCT00002386
View directory record Official record
Conditions
HIV Infections, Hemophilia A
Interventions
Indinavir sulfate, Lamivudine, Stavudine, Zidovudine, Zalcitabine, Didanosine
Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
16 Years and older · Male only
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
7
States / cities
San Francisco, California • Washington D.C., District of Columbia • Atlanta, Georgia + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 11:55 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Tumescent Lidocaine on Platelet Function

NCT01463280
View directory record Official record
Conditions
Postoperative Thromboembolism
Interventions
tumescent lidocaine infiltration
Drug
Lead sponsor
Klein, Jeffrey A., M.D.
Individual
Eligibility
18 Years and older
Enrollment
129 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
San Juan Capistrano, California
Source: ClinicalTrials.gov public record
Updated Feb 24, 2014 · Synced Jul 22, 2026, 11:55 AM EDT
Terminated Phase 4 Interventional Results available

Impact of LDL-cholesterol Lowering on Platelet Activation

NCT03331666
View directory record Official record
Conditions
Familial Hypercholesterolemia
Interventions
Evolocumab
Drug
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 31, 2021 · Synced Jul 22, 2026, 11:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

PFA-100 Responsive to Effect of Energy Drinks on Platelet Function

NCT02997111
View directory record Official record
Conditions
Platelet Function, Thrombosis
Interventions
PFA-100
Device
Lead sponsor
St. Louis University
Other
Eligibility
18 Years to 35 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 21, 2017 · Synced Jul 22, 2026, 11:55 AM EDT
Recruiting No phase listed Observational

ATHN Transcends: A Natural History Study of Non-Neoplastic Hematologic Disorders

NCT04398628
View directory record Official record
Conditions
Hematologic Disorder, Bleeding Disorder, Connective Tissue Disorder, Hemophilia, Thrombosis, Von Willebrand Diseases, Thrombophilia, Rare Bleeding Disorder, Platelet Disorder, Factor IX Deficiency, Factor VIII Deficiency, Thalassemia, Sickle Cell Disease
Interventions
Not listed
Lead sponsor
American Thrombosis and Hemostasis Network
Network
Eligibility
Not listed
Enrollment
3,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2035
U.S. locations
71
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Los Angeles, California + 59 more
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Jul 22, 2026, 11:55 AM EDT
Completed Phase 2 Interventional

Phase II Study of IL-11 (Neumega) in Von Willebrand Disease

NCT00151125
View directory record Official record
Conditions
Von Willebrand Disease
Interventions
recombinant interleukin-11
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 16, 2016 · Synced Jul 22, 2026, 11:55 AM EDT
Completed Phase 4 Interventional Results available

Reversing Ticagrelor's Effects With Fresh Platelets

NCT02201394
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Ticagrelor loading dose, Aspirin loading dose, Ticagrelor maintenance dose, Aspirin maintenance dose
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 4, 2017 · Synced Jul 22, 2026, 11:55 AM EDT
Completed No phase listed Observational

Platelet Activity in Vascular Surgery for Thrombosis and Bleeding

NCT01897103
View directory record Official record
Conditions
Peripheral Vascular Disease, Peripheral Artery Disease, Carotid Stenosis, Aortic Aneurysm, Abdominal, Aortic Aneurysm, Thoracic, Amputation, Wound, Embolism and Thrombosis, Aortic Aneurysm
Interventions
Not listed
Lead sponsor
NYU Langone Health
Other
Eligibility
21 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 13, 2017 · Synced Jul 22, 2026, 11:55 AM EDT
Completed Phase 4 Interventional Results available

Effects Contrast on Platelet Activity, Thrombosis and Fibrinolysis in Patients Undergoing Coronary Angiography

NCT01848899
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Iodixanol, Ioxaglate, Bivalirudin
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 5, 2016 · Synced Jul 22, 2026, 11:55 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Neonatal Platelet Transfusion Threshold Trial

NCT06676904
View directory record Official record
Conditions
Thrombocytopenia, Neonatal, Platelet Transfusion, Infant, Newborn, Diseases, Infant, Extremely Low Birth Weight, Infant, Small for Gestational Age, Thrombosis
Interventions
Higher Platelet Transfusion Threshold, Lower Platelet Transfusion Threshold
Procedure
Lead sponsor
NICHD Neonatal Research Network
Network
Eligibility
1 Hour to 48 Hours
Enrollment
2,433 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2031
U.S. locations
20
States / cities
Birmingham, Alabama • Palo Alto, California • San Diego, California + 17 more
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Jul 22, 2026, 11:55 AM EDT
Recruiting No phase listed Observational

ATHNdataset Registry

NCT06820515
View directory record Official record
Conditions
Hemophilia, Thrombosis, Hemophilia A, Hemophilia B, Sickle Cell Disease, Glanzmann Thrombasthenia, Bleeding Disorder, Blood Disorder, Von Willebrand Diseases
Interventions
Not listed
Lead sponsor
American Thrombosis and Hemostasis Network
Network
Eligibility
Not listed
Enrollment
200,000 participants
Timeline
2024 – 2055
U.S. locations
1
States / cities
Hickory, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 20, 2026 · Synced Jul 22, 2026, 11:55 AM EDT
Not listed Not applicable Interventional

The Inhibition of Platelet Antiaggregating Activity of Clopidogrel by Atorvastatin Detected by Erythromycin Breath Test: a Metabolic Inhibition of Hepatic Cytochrome P450-3A

NCT00004564
View directory record Official record
Conditions
Hypercholesterolemia, Thrombosis
Interventions
Clopidogrel, Atorvastatin
Drug
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
18 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 11:55 AM EDT