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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

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 5, 2026, 2:33 PM 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 5, 2026, 2:33 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Diesel Exhaust Followed by Administration of Nasal Spray Flu Vaccine on Individuals With & Without Allergies

NCT00617110
View directory record Official record
Conditions
Allergic Rhinitis
Interventions
live attenuated influenza virus (LAIV) with clean air, LAIV and diesel exhaust particles
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 35 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2014
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 2, 2015 · Synced Sep 5, 2026, 2:33 PM 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 5, 2026, 2:33 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect Of Obesity On Ozone-Induced Airway Inflammation

NCT00839943
View directory record Official record
Conditions
Obesity
Interventions
ozone, 0.4 ppm
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2012
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 26, 2012 · Synced Sep 5, 2026, 2:33 PM EDT
Completed Phase 4 Interventional

Comparison FloShield Air System Versus Clearify Visualization System (D-HELP)

NCT02419911
View directory record Official record
Conditions
Laparoscopic Surgery
Interventions
Laparoscopic surgery, FloShield Defogging and Cleaning System, Clearify Defogging and Cleaning System
Procedure · Device
Lead sponsor
Minimally Invasive Devices, Inc.
Industry
Eligibility
18 Years and older
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
3
States / cities
South Miami, Florida • Las Vegas, Nevada • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 27, 2015 · Synced Sep 5, 2026, 2:33 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Secondhand Effects of Hookah (i.e., Waterpipe) Smoke and Aerosol

NCT04661683
View directory record Official record
Conditions
Hookah Smoking, Secondhand Aerosol, Vascular Stiffness, Vaping
Interventions
Combustible Hookah Smoke, Electronic Hookah Aerosol, Clean Room Air
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 49 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Sep 5, 2026, 2:33 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Epigenetic Effect Modifications With Ozone Exposure on Healthy Volunteers

NCT02469428
View directory record Official record
Conditions
Exposure to Environmental Pollution, Non-occupational
Interventions
Clean air, Ozone
Other
Lead sponsor
Environmental Protection Agency (EPA)
Federal
Eligibility
18 Years to 40 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 29, 2019 · Synced Sep 5, 2026, 2:33 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigation of Cecal Intubation Rates and Pain Levels Between Water Exchange and Air Insufflation Flexible Sigmoidoscopy

NCT03209349
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Water Exchange Sigmoidoscopy, Air Insufflation Sigmoidoscopy
Procedure
Lead sponsor
Kelowna Gastroenterology Associates
Other
Eligibility
50 Years to 74 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
North Hills, California
Source: ClinicalTrials.gov public record
Updated Nov 6, 2022 · Synced Sep 5, 2026, 2:33 PM EDT
Recruiting Not applicable Interventional

Asthma Intervention With Residential Ventilation and Air Cleaner (AIRVAC) Study

NCT07196436
View directory record Official record
Conditions
Asthma Control, Pulmonary Function, Quality of Life, Stress, Sleep Quality
Interventions
Energy Recovery Ventilator, Portable Air Cleaner, Energy Recovery Ventilator (Sham), Portable Air Cleaner (Sham)
Device
Lead sponsor
The University of Texas at Arlington
Other
Eligibility
5 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
2
States / cities
Arlington, Texas • Plano, Texas
Source: ClinicalTrials.gov public record
Updated Oct 28, 2025 · Synced Sep 5, 2026, 2:33 PM 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 5, 2026, 2:33 PM 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 5, 2026, 2:33 PM 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 5, 2026, 2:33 PM 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 5, 2026, 2:33 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cardiopulmonary Responses to Exposure to Ozone and Diesel Exhaust

NCT01874834
View directory record Official record
Conditions
Respiratory Depression, Blood Pressure
Interventions
ozone
Other
Lead sponsor
Environmental Protection Agency (EPA)
Federal
Eligibility
18 Years to 55 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 10, 2013 · Synced Sep 5, 2026, 2:33 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Wood Stove Interventions and Child Respiratory Health

NCT02240134
View directory record Official record
Conditions
Lower Tract Respiratory Infection
Interventions
Education Intervention (Tx1), Air Filtration Unit Treatment (Tx2), Placebo Intervention (Tx3)
Behavioral · Device
Lead sponsor
University of Montana
Other
Eligibility
Up to 5 Years
Enrollment
523 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
Missoula, Montana
Source: ClinicalTrials.gov public record
Updated Jun 21, 2022 · Synced Sep 5, 2026, 2:33 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Learning and Living With Wildfire Smoke

NCT06322966
View directory record Official record
Conditions
Behavior and Behavior Mechanisms, Health Knowledge, Attitudes, Practice
Interventions
Air Action Curriculum
Other
Lead sponsor
University of Washington
Other
Eligibility
14 Years and older
Enrollment
85 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 14, 2025 · Synced Sep 5, 2026, 2:33 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Short-Term Health Outcomes of Cooking UFP Exposure

NCT07311967
View directory record Official record
Conditions
Cognitive Function Decline, Air Pollution Exposure, Respiratory Inflammation
Interventions
Clean Indoor Air Exposure (Control), Exposure to Cooking-Generated Ultrafine Particles and Gases
Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 30, 2025 · Synced Sep 5, 2026, 2:33 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Air Pollution Study: The Effect of Ozone on the Lung

NCT02673775
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
135 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
Piscataway, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 24, 2025 · Synced Sep 5, 2026, 2:33 PM 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 5, 2026, 2:33 PM 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 5, 2026, 2:33 PM 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 5, 2026, 2:33 PM 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 5, 2026, 2:33 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Interaction of Social Factors With Air Pollution

NCT02206750
View directory record Official record
Conditions
Exposure to Environmental Pollution, Non-occupational
Interventions
Clean Air, Ozone
Other
Lead sponsor
Environmental Protection Agency (EPA)
Federal
Eligibility
18 Years to 33 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 25, 2017 · Synced Sep 5, 2026, 2:33 PM EDT