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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: observational study Clear all
Recruiting No phase listed Observational

Long-term Impact of Infection With Novel Coronavirus (COVID-19)

NCT04362150
View directory record Official record
Conditions
COVID
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 100 Years
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2030
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 2, 2026, 10:05 PM EDT
Completed No phase listed Observational

Clinical Utility of Capnography in the PACU( Post-anaesthesia Care Unit)

NCT02707003
View directory record Official record
Conditions
Respiratory Depression
Interventions
Not listed
Lead sponsor
Medtronic - MITG
Industry
Eligibility
18 Years and older
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 22, 2020 · Synced Sep 2, 2026, 10:05 PM EDT
Completed No phase listed Observational

Biomarker Differences in Samples From Patients With Undifferentiated Sarcomas

NCT01802125
View directory record Official record
Conditions
Soft Tissue Sarcoma
Interventions
laboratory biomarker analysis
Other
Lead sponsor
Children's Oncology Group
Network
Eligibility
Not listed
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2013
U.S. locations
1
States / cities
Monrovia, California
Source: ClinicalTrials.gov public record
Updated Jul 13, 2016 · Synced Sep 2, 2026, 10:05 PM EDT
Recruiting No phase listed Observational

Lidocaine Infusion Treatment for Subarachnoid Hemorrhage Headaches

NCT06582810
View directory record Official record
Conditions
Subarachnoid; Hemorrhage, Nontraumatic, Headache
Interventions
Not listed
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Wichita, Kansas
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Sep 2, 2026, 10:05 PM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

GLP_1 RA Ultrasound Study

NCT06581120
View directory record Official record
Conditions
Glucagon Like Peptide-1 (GLP-1, Delayed Gastric Emptying, Risk of Aspiration, Diabetes, Morbid Obesity
Interventions
Glucagon-Like Peptide-1 receptor agonists, Point of Care Gastric Ultrasound
Drug · Diagnostic Test
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
10 Years to 25 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 6, 2024 · Synced Sep 2, 2026, 10:05 PM EDT
Completed No phase listed Observational

Long-term Study on Anti-HBV Effect of Tenofovir and Resistance Surveillance in Asian-American Adult Patients

NCT01267162
View directory record Official record
Conditions
Chronic Hepatitis B
Interventions
Not listed
Lead sponsor
Medical Procare PLLC
Other
Eligibility
18 Years to 75 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
5
States / cities
Los Angeles, California • San Jose, California • Flushing, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 15, 2016 · Synced Sep 2, 2026, 10:05 PM EDT
Not listed No phase listed Observational

Diagnosis of Alzheimer's Disease Using Event Related Potentials

NCT02957227
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
No intervention is part of this study but patients use an EEG device during observational data collection.
Device
Lead sponsor
VA Boston Healthcare System
Federal
Eligibility
50 Years to 100 Years
Enrollment
170 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
1
States / cities
Jamaica Plain, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 9, 2022 · Synced Sep 2, 2026, 10:05 PM EDT
Completed No phase listed Observational

A Retrospective Study of Subjects With Thymidine Kinase 2 Deficiency

NCT05017818
View directory record Official record
Conditions
Thymidine Kinase 2 Deficiency
Interventions
Observational retrospective data
Other
Lead sponsor
Zogenix MDS, Inc.
Industry
Eligibility
Not listed
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
4
States / cities
Los Angeles, California • Indianapolis, Indiana • Akron, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 31, 2023 · Synced Sep 2, 2026, 10:05 PM EDT
Active, not recruiting No phase listed Observational

Study of the CycloPen Micro-Interventional System and Long-Term Clinical Outcomes

NCT05506423
View directory record Official record
Conditions
Open Angle Glaucoma
Interventions
CycloPen Cyclodialysis System
Device
Lead sponsor
Iantrek, Inc.
Industry
Eligibility
21 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
15
States / cities
Newport Beach, California • Cape Coral, Florida • DeLand, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 2, 2026, 10:05 PM EDT
Terminated Not applicable Interventional

Flaxseed in Preventing Breast Cancer in Premenopausal Women at Risk of Developing Breast Cancer

NCT00794989
View directory record Official record
Conditions
Breast Cancer, Precancerous Condition
Interventions
Ground Flaxseed, No Intervention
Dietary Supplement · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
21 Years to 50 Years · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
2
States / cities
Chicago, Illinois • Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 2, 2016 · Synced Sep 2, 2026, 10:05 PM EDT
Completed No phase listed Observational Results available

Study of Entecavir in Patients With Chronic Hepatitis B Virus (HBV) Infection

NCT00388674
View directory record Official record
Conditions
Chronic Hepatitis B
Interventions
entecavir, Other anti-HBV medication
Drug
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
16 Years and older
Enrollment
12,522 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2016
U.S. locations
20
States / cities
Coronado, California • Los Angeles, California • San Francisco, California + 14 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2018 · Synced Sep 2, 2026, 10:05 PM EDT
Completed No phase listed Observational

Characterization of Dyschromic Hypertrophic Scar

NCT04619589
View directory record Official record
Conditions
Burn Scar, Hypertrophic Scar, Hyperpigmentation, Hypopigmented Scar
Interventions
Not listed
Lead sponsor
Medstar Health Research Institute
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Nov 2, 2023 · Synced Sep 2, 2026, 10:05 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Protocol CAUSE-03 / CHEETAH

NCT06136091
View directory record Official record
Conditions
Asthma
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
6 Years to 17 Years
Enrollment
310 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
8
States / cities
Aurora, Colorado • Washington D.C., District of Columbia • Chicago, Illinois + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Sep 2, 2026, 10:05 PM EDT
Not yet recruiting No phase listed Observational

Assessment Of Burn Severity and Extent Spatial Frequency Domain Imaging

NCT06921421
View directory record Official record
Conditions
Burn, Burn Injury
Interventions
Spatial Frequency Domain Imaging
Diagnostic Test
Lead sponsor
The Metis Foundation
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Fort Sam Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 9, 2025 · Synced Sep 2, 2026, 10:05 PM EDT
Completed No phase listed Observational Results available

Hybrid Revascularization Observational Study

NCT01121263
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Not listed
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
298 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
11
States / cities
Atlanta, Georgia • Baltimore, Maryland • Boston, Massachusetts + 8 more
Source: ClinicalTrials.gov public record
Updated Mar 13, 2014 · Synced Sep 2, 2026, 10:05 PM EDT
Completed No phase listed Observational

DISRUPT PAD III Observational Study

NCT05881421
View directory record Official record
Conditions
Peripheral Arterial Disease
Interventions
Not listed
Lead sponsor
Shockwave Medical, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,373 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
26
States / cities
Palo Alto, California • Aurora, Colorado • Loveland, Colorado + 22 more
Source: ClinicalTrials.gov public record
Updated May 30, 2023 · Synced Sep 2, 2026, 10:05 PM EDT
Completed No phase listed Observational

Interview of Patients With HR+/HER2- Metastatic Breast Cancer Who Received Capivasertib + Fulvestrant

NCT07008963
View directory record Official record
Conditions
Metastatic Breast Cancer
Interventions
non-interventional
Other
Lead sponsor
AstraZeneca
Industry
Eligibility
Not listed
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Redwood Shores, California
Source: ClinicalTrials.gov public record
Updated Feb 22, 2026 · Synced Sep 2, 2026, 10:05 PM EDT
Terminated No phase listed Observational

Correlation Of Respiratory Rate Level And Trend Evaluation in Heart Failure Patients

NCT00758121
View directory record Official record
Conditions
Heart Failure
Interventions
Cardiac Resynchronization Therapy Defibrillator
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Nov 5, 2009 · Synced Sep 2, 2026, 10:05 PM EDT
Completed Not applicable Interventional

Mechanical Insufflation in the Philadelphia Amyotrophic Lateral Sclerosis Cohort (MI-PALS) Study

NCT06119087
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis, Chronic Respiratory Failure, Airway Clearance Impairment, Neuromuscular Diseases
Interventions
Mechanical insufflation
Device
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 2, 2026, 10:05 PM EDT
Recruiting No phase listed Observational

Evaluation of 18F-TFB PET/CT Scan in Patients With Differentiated Thyroid Cancer

NCT05575440
View directory record Official record
Conditions
Differentiated Thyroid Gland Carcinoma, Thyroid Gland Follicular Carcinoma, Thyroid Gland Papillary Carcinoma
Interventions
Computed Tomography, Fluorine F 18 Tetrafluoroborate, Positron Emission Tomography, Survey Administration
Procedure · Radiation · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Sep 2, 2026, 10:05 PM EDT
Not yet recruiting No phase listed Observational

A Prospective Study of Physical Function in Adults Who Receive Systemic Therapy for Stage I-III Gastroesophageal Cancer, FAST-GO Study

NCT07517211
View directory record Official record
Conditions
Clinical Stage I Esophageal Adenocarcinoma AJCC v8, Clinical Stage I Esophageal Squamous Cell Carcinoma AJCC v8, Clinical Stage I Gastric Cancer AJCC v8, Clinical Stage I Gastroesophageal Junction Adenocarcinoma AJCC v8, Clinical Stage II Esophageal Adenocarcinoma AJCC v8, Clinical Stage II Esophageal Squamous Cell Carcinoma AJCC v8, Clinical Stage II Gastric Cancer AJCC v8, Clinical Stage II Gastroesophageal Junction Adenocarcinoma AJCC v8, Clinical Stage III Esophageal Adenocarcinoma AJCC v8, Clinical Stage III Esophageal Squamous Cell Carcinoma AJCC v8, Clinical Stage III Gastric Cancer AJCC v8, Clinical Stage III Gastroesophageal Junction Adenocarcinoma AJCC v8
Interventions
Non-Interventional Study
Other
Lead sponsor
Jonsson Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 2, 2026, 10:05 PM EDT
Completed No phase listed Observational

T-SPOT.CMV and T-SPOT.PRT Diagnostic Assays

NCT02382211
View directory record Official record
Conditions
Infection in Solid Organ Transplant Recipients
Interventions
Not listed
Lead sponsor
Oxford Immunotec
Industry
Eligibility
18 Years to 75 Years
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
35
States / cities
Tucson, Arizona • Irvine, California • Loma Linda, California + 30 more
Source: ClinicalTrials.gov public record
Updated Apr 24, 2019 · Synced Sep 2, 2026, 10:05 PM EDT
Active, not recruiting No phase listed Observational

Patient Reported Outcome Post Radiation Therapy or Chemoradiotherapy Patient Care in Patients With Oropharyngeal Cancer

NCT04874493
View directory record Official record
Conditions
Oropharyngeal Carcinoma
Interventions
Electronic Health Record Review, Questionnaire Administration
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 15, 2026 · Synced Sep 2, 2026, 10:05 PM EDT
Completed Not applicable Interventional Results available

Additional Long-Term Follow-up for Subjects Implanted With a CyPass® Micro-Stent

NCT04629521
View directory record Official record
Conditions
Primary Open Angle Glaucoma, Cataract
Interventions
CyPass Micro-Stent, Cataract Surgery
Device · Procedure
Lead sponsor
Alcon Research
Industry
Eligibility
45 Years and older
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
12
States / cities
Glendale, Arizona • Orange, California • Fort Collins, Colorado + 9 more
Source: ClinicalTrials.gov public record
Updated Apr 25, 2024 · Synced Sep 2, 2026, 10:05 PM EDT