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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Completed Not applicable Interventional

Water-aided Colonoscopy vs Air Insufflation Colonoscopy in Colorectal Cancer Screening

NCT02041507
View directory record Official record
Conditions
Colorectal Cancer, Colorectal Adenomas, Colorectal Polyps, Pain
Interventions
Air insufflation method., Water Immersion method., Water Exchange method.
Other
Lead sponsor
Presidio Ospedaliero Santa Barbara
Other
Eligibility
50 Years to 70 Years
Enrollment
1,224 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 12, 2016 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Sequential Exposure to Nitrogen Dioxide and Ozone in Healthy Adult Human Volunteers.

NCT02133586
View directory record Official record
Conditions
Respiratory Depression
Interventions
Ozone, Nitrogen dioxide
Other
Lead sponsor
Environmental Protection Agency (EPA)
Federal
Eligibility
18 Years to 40 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 16, 2020 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional

Clinical Trial of Air Cleaners to Improve Indoor Air Quality and COPD Health

NCT02236858
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease (COPD)
Interventions
HEPA Air Cleaner, Sham HEPA Air Cleaner
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
40 Years and older
Enrollment
142 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 13, 2021 · Synced Sep 11, 2026, 6:14 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Role of Macrophage Activation in Lung Injury Following Ozone Exposure

NCT05794087
View directory record Official record
Conditions
Air Pollution
Interventions
Clean Air, Ozone
Other
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years to 40 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Piscataway, New Jersey
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Ozone Cardiovascular Effects in Genetically Susceptible People

NCT01192477
View directory record Official record
Conditions
Healthy
Interventions
Ozone
Other
Lead sponsor
University of Rochester
Other
Eligibility
18 Years to 40 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Dec 3, 2013 · Synced Sep 11, 2026, 6:14 AM EDT
Recruiting Not applicable Interventional

Peri-implantitis Management: Surgical and Maintenance Outcomes

NCT07550127
View directory record Official record
Conditions
Peri-implantitis
Interventions
Resective surgery with implantoplasty, Resective surgery with mechanical debridement
Procedure
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 9, 2026 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Phase 4 Interventional Results available

A Study to Evaluate the Efficacy and Safety of a Leave-in Spray in Subjects With Head Lice Infestation

NCT05565820
View directory record Official record
Conditions
Pediculosis Capitis, Lice Infestations, Head Lice
Interventions
Vamousse Spray 'n' Go, Nix Creme Rinse Lice Treatment
Other · Drug
Lead sponsor
Alliance Pharmaceuticals
Industry
Eligibility
2 Years to 75 Years
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 23, 2025 · Synced Sep 11, 2026, 6:14 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

BATokines as Biomarkers of Brown Fat in Humans

NCT05050240
View directory record Official record
Conditions
Healthy Lifestyle
Interventions
Cooling Vest Procedure, Fasting overnight
Other
Lead sponsor
Rockefeller University
Other
Eligibility
18 Years to 28 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 26, 2026 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional

A Comparison of Air Insufflation, Water Immersion and Water Exchange Colonoscopy in Diagnostic Patients

NCT01781650
View directory record Official record
Conditions
Pain, Colorectal Adenomas, Colorectal Cancer
Interventions
Air Insufflation method., Water Immersion method., Water Exchange method.
Other
Lead sponsor
Presidio Ospedaliero Santa Barbara
Other
Eligibility
18 Years to 85 Years
Enrollment
288 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 14, 2014 · Synced Sep 11, 2026, 6:14 AM EDT
Recruiting Phase 3 Interventional

Multi-Center Clean Air Randomized Controlled Trial in COPD

NCT06376994
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease (COPD)
Interventions
Air cleaner, Sham air cleaner
Device
Lead sponsor
JHSPH Center for Clinical Trials
Other
Eligibility
40 Years and older
Enrollment
770 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
11
States / cities
Birmingham, Alabama • Los Angeles, California • Iowa City, Iowa + 7 more
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Responses to Exposure to Low Levels of Concentrated Ambient Particles in Healthy Young Adults

NCT03232086
View directory record Official record
Conditions
Exposure to Pollution
Interventions
Clean Air, PM2.5
Other
Lead sponsor
Environmental Protection Agency (EPA)
Federal
Eligibility
18 Years to 35 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 4, 2021 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Human Biological Responses to Low Level Ozone

NCT02857283
View directory record Official record
Conditions
Environmental Exposure, Nasal Inflammation
Interventions
Ozone, Filtered Air, Health and Exposure Tracker (HET)
Other · Device
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 50 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated May 13, 2021 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Wildfire Related Air Pollution Exposure and Cognitive Function Pilot Study

NCT07151235
View directory record Official record
Conditions
Healthy Participants
Interventions
Simulated wildfire smoke exposure, Clean Air exposure
Other
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years to 40 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Piscataway, New Jersey
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Evaluate the Ability of Sunscreen Products to Modulate the Effects of Deep UVA +/- HEV Blue Light Induced Pigmentation and Biomarkers of Cutaneous Oxidative Stress

NCT07695753
View directory record Official record
Conditions
Pigmentation, Oxidative Stress
Interventions
Sunscreen application #1, Sunscreen application #2
Other
Lead sponsor
Kenvue Brands LLC
Industry
Eligibility
18 Years to 60 Years · Female only
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Union, New Jersey
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional Results available

Evaluating the Effect of Tooth Cleaning Devices on Oral Health

NCT01250769
View directory record Official record
Conditions
Dental Plaque
Interventions
Manual Toothbrush, Interproximal Cleaning Device
Device
Lead sponsor
Philips Oral Healthcare
Industry
Eligibility
18 Years to 70 Years
Enrollment
170 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Fort Wayne, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 18, 2012 · Synced Sep 11, 2026, 6:14 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Lotrafilcon B Plano Cosmetic Contact Lenses Study

NCT06493383
View directory record Official record
Conditions
Cosmetic Appearance
Interventions
Lotrafilcon B plano cosmetic contact lenses
Device
Lead sponsor
Alcon Research
Industry
Eligibility
12 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Jun 11, 2025 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional

Acupuncture for the Prevention of Emergence Delirium in Children Undergoing Myringotomy Tube Placement

NCT02383004
View directory record Official record
Conditions
Delirium, Psychomotor Agitation
Interventions
Acupuncture
Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
1 Year to 6 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jan 17, 2017 · Synced Sep 11, 2026, 6:14 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Graded Exercise Hypoxia Testing

NCT06901284
View directory record Official record
Conditions
Hypoxia
Interventions
Graded Exercise Test, Graded Hypoxia Exercise Test
Diagnostic Test
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
2
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional

A Comparison of Air Insufflation, Water Immersion and Water Exchange Colonoscopy in CRC Screening

NCT01780818
View directory record Official record
Conditions
Pain, Colorectal Adenomas, Colorectal Cancer
Interventions
Air Insufflation method., Water Immersion method., Water Exchange method.
Other
Lead sponsor
Presidio Ospedaliero Santa Barbara
Other
Eligibility
50 Years to 70 Years
Enrollment
288 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 14, 2014 · Synced Sep 11, 2026, 6:14 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Caries Detection With Two Different Caries Detecting Devices

NCT06152081
View directory record Official record
Conditions
Caries,Dental
Interventions
LumiCare rinse, QLF Inspektor Pro Imaging
Device
Lead sponsor
Tufts University
Other
Eligibility
21 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 4, 2025 · Synced Sep 11, 2026, 6:14 AM EDT
Suspended Not applicable Interventional Accepts healthy volunteers

Controlled Exposure of Healthy Nonsmokers to Secondhand and Thirdhand Cigarette Smoke

NCT04013256
View directory record Official record
Conditions
Pollution; Exposure, Smoke Inhalation, Exposure to Pollution
Interventions
Cigarette Smoke, Clean Air and Clean Clothing/Sham exposure
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 50 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Aug 27, 2023 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Epigenetic Effects of Diesel Exhaust and Ozone Exposure

NCT01492517
View directory record Official record
Conditions
Exposure to Pollution, Inhalation of Ozone
Interventions
Ozone exposure, Diesel exhaust, Ozone18, Clean Air
Other
Lead sponsor
Environmental Protection Agency (EPA)
Federal
Eligibility
18 Years to 55 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2015
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 17, 2016 · Synced Sep 11, 2026, 6:14 AM EDT
Active, not recruiting Not applicable Interventional Results available

Community Mobilization for Improved Clean Cookstove Uptake, Household Air Pollution Reduction, and Hypertension Prevention

NCT05048147
View directory record Official record
Conditions
Hypertension
Interventions
Community Mobilization
Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 85 Years
Enrollment
1,280 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
2
States / cities
Chicago, Illinois • New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Sep 11, 2026, 6:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Human Perception of Odors and Odor Blockers

NCT06191419
View directory record Official record
Conditions
Tobacco Smoking, Smoking Behaviors
Interventions
Odorants
Other
Lead sponsor
Tim McClintock
Other
Eligibility
18 Years to 60 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 11, 2026, 6:14 AM EDT